

<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.merit.com/role/AccruedExpenses" xlink:href="mmsi-20161231.xsd#AccruedExpenses" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/AccruedExpensesDetails" xlink:href="mmsi-20161231.xsd#AccruedExpensesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/AccruedExpensesTables" xlink:href="mmsi-20161231.xsd#AccruedExpensesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/Acquisitions" xlink:href="mmsi-20161231.xsd#Acquisitions" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/AcquisitionsNarrativeDetails" xlink:href="mmsi-20161231.xsd#AcquisitionsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/AcquisitionsPurchasePriceAllocationDetails" xlink:href="mmsi-20161231.xsd#AcquisitionsPurchasePriceAllocationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/AcquisitionsSummaryOfUnauditedConsolidatedResultsOfOperationsIncludingProformaResultsDetails" xlink:href="mmsi-20161231.xsd#AcquisitionsSummaryOfUnauditedConsolidatedResultsOfOperationsIncludingProformaResultsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/AcquisitionsTables" xlink:href="mmsi-20161231.xsd#AcquisitionsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/CommitmentsAndContingencies" xlink:href="mmsi-20161231.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/CommitmentsAndContingenciesNarrativeDetails" xlink:href="mmsi-20161231.xsd#CommitmentsAndContingenciesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/CommitmentsAndContingenciesScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesDetails" xlink:href="mmsi-20161231.xsd#CommitmentsAndContingenciesScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/CommitmentsAndContingenciesTables" xlink:href="mmsi-20161231.xsd#CommitmentsAndContingenciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/ConsolidatedBalanceSheets" xlink:href="mmsi-20161231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="mmsi-20161231.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="mmsi-20161231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/ConsolidatedStatementsOfCashFlowsParenthetical" xlink:href="mmsi-20161231.xsd#ConsolidatedStatementsOfCashFlowsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:href="mmsi-20161231.xsd#ConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/ConsolidatedStatementsOfOperations" xlink:href="mmsi-20161231.xsd#ConsolidatedStatementsOfOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="mmsi-20161231.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/Derivatives" xlink:href="mmsi-20161231.xsd#Derivatives" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/DerivativesAmountOfGainLossRecognizedInOciAndIncomeStatementDetails" xlink:href="mmsi-20161231.xsd#DerivativesAmountOfGainLossRecognizedInOciAndIncomeStatementDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/DerivativesFairValueOfDerivativeInstrumentsDetails" xlink:href="mmsi-20161231.xsd#DerivativesFairValueOfDerivativeInstrumentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/DerivativesForwardNotionalContractsDetails" xlink:href="mmsi-20161231.xsd#DerivativesForwardNotionalContractsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/DerivativesGainLossInConsolidatedStatementsOfIncomeDetails" xlink:href="mmsi-20161231.xsd#DerivativesGainLossInConsolidatedStatementsOfIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/DerivativesNarrativeDetails" xlink:href="mmsi-20161231.xsd#DerivativesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/DerivativesPolicies" xlink:href="mmsi-20161231.xsd#DerivativesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/DerivativesTables" xlink:href="mmsi-20161231.xsd#DerivativesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/DocumentAndEntityInformation" xlink:href="mmsi-20161231.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EarningsPerCommonShareEps" xlink:href="mmsi-20161231.xsd#EarningsPerCommonShareEps" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EarningsPerCommonShareEpsDetails" xlink:href="mmsi-20161231.xsd#EarningsPerCommonShareEpsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EarningsPerCommonShareEpsTables" xlink:href="mmsi-20161231.xsd#EarningsPerCommonShareEpsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EmployeeBenefitPlans" xlink:href="mmsi-20161231.xsd#EmployeeBenefitPlans" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EmployeeBenefitPlansDetails" xlink:href="mmsi-20161231.xsd#EmployeeBenefitPlansDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrants" xlink:href="mmsi-20161231.xsd#EmployeeStockPurchasePlanStockOptionsAndWarrants" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsAllocationOfRecognizedPeriodCostsDetails" xlink:href="mmsi-20161231.xsd#EmployeeStockPurchasePlanStockOptionsAndWarrantsAllocationOfRecognizedPeriodCostsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsFairValueCalculationAssumptionsDetails" xlink:href="mmsi-20161231.xsd#EmployeeStockPurchasePlanStockOptionsAndWarrantsFairValueCalculationAssumptionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsNarrativeDetails" xlink:href="mmsi-20161231.xsd#EmployeeStockPurchasePlanStockOptionsAndWarrantsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsOptionsOutstandingDetails" xlink:href="mmsi-20161231.xsd#EmployeeStockPurchasePlanStockOptionsAndWarrantsOptionsOutstandingDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsStockOptionActivityDetails" xlink:href="mmsi-20161231.xsd#EmployeeStockPurchasePlanStockOptionsAndWarrantsStockOptionActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsTables" xlink:href="mmsi-20161231.xsd#EmployeeStockPurchasePlanStockOptionsAndWarrantsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/FairValueMeasurements" xlink:href="mmsi-20161231.xsd#FairValueMeasurements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/FairValueMeasurementsFairValueInputsLiabilitiesQuantitativeInformationDetails" xlink:href="mmsi-20161231.xsd#FairValueMeasurementsFairValueInputsLiabilitiesQuantitativeInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/FairValueMeasurementsFinancialAssetsAndLiabilitiesCarriedAtFairValueDetails" xlink:href="mmsi-20161231.xsd#FairValueMeasurementsFinancialAssetsAndLiabilitiesCarriedAtFairValueDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/FairValueMeasurementsLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationDetails" xlink:href="mmsi-20161231.xsd#FairValueMeasurementsLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/FairValueMeasurementsNarrativeDetails" xlink:href="mmsi-20161231.xsd#FairValueMeasurementsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/FairValueMeasurementsTables" xlink:href="mmsi-20161231.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/GoodwillAndIntangibleAssets" xlink:href="mmsi-20161231.xsd#GoodwillAndIntangibleAssets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/GoodwillAndIntangibleAssetsFutureAmortizationExpenseDetails" xlink:href="mmsi-20161231.xsd#GoodwillAndIntangibleAssetsFutureAmortizationExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/GoodwillAndIntangibleAssetsGoodwillDetails" xlink:href="mmsi-20161231.xsd#GoodwillAndIntangibleAssetsGoodwillDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/GoodwillAndIntangibleAssetsNarrativeDetails" xlink:href="mmsi-20161231.xsd#GoodwillAndIntangibleAssetsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/GoodwillAndIntangibleAssetsOtherIntangibleAssetsDetails" xlink:href="mmsi-20161231.xsd#GoodwillAndIntangibleAssetsOtherIntangibleAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/GoodwillAndIntangibleAssetsTables" xlink:href="mmsi-20161231.xsd#GoodwillAndIntangibleAssetsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/IncomeTaxes" xlink:href="mmsi-20161231.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetails" xlink:href="mmsi-20161231.xsd#IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails" xlink:href="mmsi-20161231.xsd#IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/IncomeTaxesDomesticAndForeignDetails" xlink:href="mmsi-20161231.xsd#IncomeTaxesDomesticAndForeignDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails" xlink:href="mmsi-20161231.xsd#IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/IncomeTaxesNarrativeDetails" xlink:href="mmsi-20161231.xsd#IncomeTaxesNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/IncomeTaxesSummaryOfIncomeTaxContingenciesDetails" xlink:href="mmsi-20161231.xsd#IncomeTaxesSummaryOfIncomeTaxContingenciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/IncomeTaxesTables" xlink:href="mmsi-20161231.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/Inventories" xlink:href="mmsi-20161231.xsd#Inventories" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/InventoriesDetails" xlink:href="mmsi-20161231.xsd#InventoriesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/InventoriesTables" xlink:href="mmsi-20161231.xsd#InventoriesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPolicies" xlink:href="mmsi-20161231.xsd#OrganizationAndSummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesAccumulatedOtherComprehensiveIncomeLossDetails" xlink:href="mmsi-20161231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesConcentrationOfCreditRiskDetails" xlink:href="mmsi-20161231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesConcentrationOfCreditRiskDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesDeferredCompensationDetails" xlink:href="mmsi-20161231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesDeferredCompensationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesIntangibleAssetsDetails" xlink:href="mmsi-20161231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesIntangibleAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesOrganizationDetails" xlink:href="mmsi-20161231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesOrganizationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesOtherAssetsDetails" xlink:href="mmsi-20161231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesOtherAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="mmsi-20161231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:href="mmsi-20161231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:href="mmsi-20161231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesTables" xlink:href="mmsi-20161231.xsd#OrganizationAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/QuarterlyResultsOfOperationsUnaudited" xlink:href="mmsi-20161231.xsd#QuarterlyResultsOfOperationsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/QuarterlyResultsOfOperationsUnauditedDetails" xlink:href="mmsi-20161231.xsd#QuarterlyResultsOfOperationsUnauditedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/QuarterlyResultsOfOperationsUnauditedTables" xlink:href="mmsi-20161231.xsd#QuarterlyResultsOfOperationsUnauditedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebt" xlink:href="mmsi-20161231.xsd#RevolvingCreditFacilityAndLongTermDebt" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebtFinancialCovenantsDetails" xlink:href="mmsi-20161231.xsd#RevolvingCreditFacilityAndLongTermDebtFinancialCovenantsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebtFutureMinimumPaymentsOnLongTermDebtDetails" xlink:href="mmsi-20161231.xsd#RevolvingCreditFacilityAndLongTermDebtFutureMinimumPaymentsOnLongTermDebtDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebtNarrativeDetails" xlink:href="mmsi-20161231.xsd#RevolvingCreditFacilityAndLongTermDebtNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebtPrincipalBalancesUnderLongTermDebtDetails" xlink:href="mmsi-20161231.xsd#RevolvingCreditFacilityAndLongTermDebtPrincipalBalancesUnderLongTermDebtDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebtTables" xlink:href="mmsi-20161231.xsd#RevolvingCreditFacilityAndLongTermDebtTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/RoyaltyAgreements" xlink:href="mmsi-20161231.xsd#RoyaltyAgreements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/RoyaltyAgreementsNarrativeDetails" xlink:href="mmsi-20161231.xsd#RoyaltyAgreementsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/ScheduleIiValuationAndQualifyingAccounts" xlink:href="mmsi-20161231.xsd#ScheduleIiValuationAndQualifyingAccounts" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/ScheduleIiValuationAndQualifyingAccountsDetails" xlink:href="mmsi-20161231.xsd#ScheduleIiValuationAndQualifyingAccountsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/SegmentReportingAndForeignOperations" xlink:href="mmsi-20161231.xsd#SegmentReportingAndForeignOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/SegmentReportingAndForeignOperationsAssetsDetails" xlink:href="mmsi-20161231.xsd#SegmentReportingAndForeignOperationsAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/SegmentReportingAndForeignOperationsLongLivedAssetsByGeographicAreaDetails" xlink:href="mmsi-20161231.xsd#SegmentReportingAndForeignOperationsLongLivedAssetsByGeographicAreaDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/SegmentReportingAndForeignOperationsNarrativeDetails" xlink:href="mmsi-20161231.xsd#SegmentReportingAndForeignOperationsNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/SegmentReportingAndForeignOperationsOperatingIncomeDetails" xlink:href="mmsi-20161231.xsd#SegmentReportingAndForeignOperationsOperatingIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/SegmentReportingAndForeignOperationsSalesByBusinessSegmentDetails" xlink:href="mmsi-20161231.xsd#SegmentReportingAndForeignOperationsSalesByBusinessSegmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/SegmentReportingAndForeignOperationsTables" xlink:href="mmsi-20161231.xsd#SegmentReportingAndForeignOperationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/SubsequentEvents" xlink:href="mmsi-20161231.xsd#SubsequentEvents" xlink:type="simple" />
  <link:roleRef roleURI="http://www.merit.com/role/SubsequentEventsDetails" xlink:href="mmsi-20161231.xsd#SubsequentEventsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <link:presentationLink xlink:role="http://www.merit.com/role/AccruedExpenses" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract" xlink:label="loc_us-gaap_PayablesAndAccrualsAbstract_E306F85AA83E4B069ECFD27CC9354390" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock_602B969C6BB9FA2D7A66D27CC935B6DB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_E306F85AA83E4B069ECFD27CC9354390" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesDisclosureTextBlock_602B969C6BB9FA2D7A66D27CC935B6DB" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/AccruedExpensesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract" xlink:label="loc_us-gaap_PayablesAndAccrualsAbstract_04CDCE424917D9474E88D27CC8D7CD95" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedPayrollTaxesCurrent" xlink:label="loc_us-gaap_AccruedPayrollTaxesCurrent_6F0FAA6699AA8790D1F7D27CC8D70B69" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_04CDCE424917D9474E88D27CC8D7CD95" xlink:to="loc_us-gaap_AccruedPayrollTaxesCurrent_6F0FAA6699AA8790D1F7D27CC8D70B69" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedSalariesCurrent" xlink:label="loc_us-gaap_AccruedSalariesCurrent_5E694FED2C669F92CE28D27CC8D847E8" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_04CDCE424917D9474E88D27CC8D7CD95" xlink:to="loc_us-gaap_AccruedSalariesCurrent_5E694FED2C669F92CE28D27CC8D847E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedBonusesCurrent" xlink:label="loc_us-gaap_AccruedBonusesCurrent_F58E5FEC531FF3137CBDD27CC8D83674" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_04CDCE424917D9474E88D27CC8D7CD95" xlink:to="loc_us-gaap_AccruedBonusesCurrent_F58E5FEC531FF3137CBDD27CC8D83674" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedSalesCommissionCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccruedSalesCommissionCurrentAndNoncurrent_13AE457F523C225FDCC3D27CC8D8A1EB" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_04CDCE424917D9474E88D27CC8D7CD95" xlink:to="loc_us-gaap_AccruedSalesCommissionCurrentAndNoncurrent_13AE457F523C225FDCC3D27CC8D8A1EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedVacationCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccruedVacationCurrentAndNoncurrent_949C823B0B91BD108078D27CC8D87052" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_04CDCE424917D9474E88D27CC8D7CD95" xlink:to="loc_us-gaap_AccruedVacationCurrentAndNoncurrent_949C823B0B91BD108078D27CC8D87052" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedRoyaltiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccruedRoyaltiesCurrentAndNoncurrent_647276DD236807A83A39D27CC8D8338A" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_04CDCE424917D9474E88D27CC8D7CD95" xlink:to="loc_us-gaap_AccruedRoyaltiesCurrentAndNoncurrent_647276DD236807A83A39D27CC8D8338A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesAndExciseTaxPayableCurrent" xlink:label="loc_us-gaap_SalesAndExciseTaxPayableCurrent_81D13A3D4909DC82B355D27CC8D81CE0" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_04CDCE424917D9474E88D27CC8D7CD95" xlink:to="loc_us-gaap_SalesAndExciseTaxPayableCurrent_81D13A3D4909DC82B355D27CC8D81CE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_27AE963F3EA130D62AC5D27CC8D87FDA" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_04CDCE424917D9474E88D27CC8D7CD95" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_27AE963F3EA130D62AC5D27CC8D87FDA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_535BF783760B9D880BAFD27CC8D8AEBE" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_04CDCE424917D9474E88D27CC8D7CD95" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_535BF783760B9D880BAFD27CC8D8AEBE" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/AccruedExpensesTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PayablesAndAccrualsAbstract" xlink:label="loc_us-gaap_PayablesAndAccrualsAbstract_ED82846D0A74A2A58EB2D27CC9A7E74A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_9BDAB1A18A71FB87881FD27CC9A70C37" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PayablesAndAccrualsAbstract_ED82846D0A74A2A58EB2D27CC9A7E74A" xlink:to="loc_us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_9BDAB1A18A71FB87881FD27CC9A70C37" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/Acquisitions" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_D72765AA4A59288925F58114F88BAD5D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="loc_us-gaap_BusinessCombinationDisclosureTextBlock_A8B7F59A9F5947185D238114F88BD123" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_D72765AA4A59288925F58114F88BAD5D" xlink:to="loc_us-gaap_BusinessCombinationDisclosureTextBlock_A8B7F59A9F5947185D238114F88BD123" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/AcquisitionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_30F1994BD53CCD81E57B8173C91029DF" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9F2CC350B3BA4A6FF1E98173C911327E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_30F1994BD53CCD81E57B8173C91029DF" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9F2CC350B3BA4A6FF1E98173C911327E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_C4E82F77FA97E83160128173C911F6FE" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9F2CC350B3BA4A6FF1E98173C911327E" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_C4E82F77FA97E83160128173C911F6FE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_F4F10196A724D2B468DA8173C9115944" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_C4E82F77FA97E83160128173C911F6FE" xlink:to="loc_us-gaap_RelatedPartyDomain_F4F10196A724D2B468DA8173C9115944" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvesteeMember" xlink:label="loc_us-gaap_InvesteeMember_51F27884D31547601EA28173C911C566" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyDomain_F4F10196A724D2B468DA8173C9115944" xlink:to="loc_us-gaap_InvesteeMember_51F27884D31547601EA28173C911C566" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LimitedLiabilityCompanyMember" xlink:label="loc_us-gaap_LimitedLiabilityCompanyMember_3A26612AEB46BA076C748173C911460C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RelatedPartyDomain_F4F10196A724D2B468DA8173C9115944" xlink:to="loc_us-gaap_LimitedLiabilityCompanyMember_3A26612AEB46BA076C748173C911460C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_4C4130C1F74159B4CF148173C9126C93" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9F2CC350B3BA4A6FF1E98173C911327E" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_4C4130C1F74159B4CF148173C9126C93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_5C6312A543A5C8B954AE8173C9126774" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_4C4130C1F74159B4CF148173C9126C93" xlink:to="loc_us-gaap_SegmentDomain_5C6312A543A5C8B954AE8173C9126774" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CardiovascularSegmentMember" xlink:label="loc_mmsi_CardiovascularSegmentMember_11E6AFE6D7C97E7AC0898173C9124FD9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_5C6312A543A5C8B954AE8173C9126774" xlink:to="loc_mmsi_CardiovascularSegmentMember_11E6AFE6D7C97E7AC0898173C9124FD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_EFBC596BAB1BBF0E53498173C912A06B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9F2CC350B3BA4A6FF1E98173C911327E" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_EFBC596BAB1BBF0E53498173C912A06B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReceivableTypeDomain" xlink:label="loc_us-gaap_ReceivableTypeDomain_6A93891A1EA4525ACAF88173C912C8FC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_EFBC596BAB1BBF0E53498173C912A06B" xlink:to="loc_us-gaap_ReceivableTypeDomain_6A93891A1EA4525ACAF88173C912C8FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LoansReceivableMember" xlink:label="loc_us-gaap_LoansReceivableMember_6C67A05332FE3C8749668173C9123C9B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReceivableTypeDomain_6A93891A1EA4525ACAF88173C912C8FC" xlink:to="loc_us-gaap_LoansReceivableMember_6C67A05332FE3C8749668173C9123C9B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnInvestmentsByCategoryAxis" xlink:label="loc_us-gaap_GainLossOnInvestmentsByCategoryAxis_C696876B86C5B4056D5A8173C91336BF" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9F2CC350B3BA4A6FF1E98173C911327E" xlink:to="loc_us-gaap_GainLossOnInvestmentsByCategoryAxis_C696876B86C5B4056D5A8173C91336BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain" xlink:label="loc_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_F859D9C5CAB7D1F3CC448173C9137376" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GainLossOnInvestmentsByCategoryAxis_C696876B86C5B4056D5A8173C91336BF" xlink:to="loc_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_F859D9C5CAB7D1F3CC448173C9137376" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostmethodInvestmentsMember" xlink:label="loc_us-gaap_CostmethodInvestmentsMember_017DF36F1477009BA2068173C913D55B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostCategoriesOfInvestmentsDomain_F859D9C5CAB7D1F3CC448173C9137376" xlink:to="loc_us-gaap_CostmethodInvestmentsMember_017DF36F1477009BA2068173C913D55B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CounterpartyNameAxis" xlink:label="loc_us-gaap_CounterpartyNameAxis_40C5A0E639F7A0D01F938173C9130FEC" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9F2CC350B3BA4A6FF1E98173C911327E" xlink:to="loc_us-gaap_CounterpartyNameAxis_40C5A0E639F7A0D01F938173C9130FEC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CounterpartyNameAxis_40C5A0E639F7A0D01F938173C9130FEC" xlink:to="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BluegrassVascularTechnologiesInc.Member" xlink:label="loc_mmsi_BluegrassVascularTechnologiesInc.Member_0A95D419304DC8D7B6628173C9134AAF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:to="loc_mmsi_BluegrassVascularTechnologiesInc.Member_0A95D419304DC8D7B6628173C9134AAF" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CagentVascularLLCMember" xlink:label="loc_mmsi_CagentVascularLLCMember_02EDE4824A43FAB168578173C913521A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:to="loc_mmsi_CagentVascularLLCMember_02EDE4824A43FAB168578173C913521A" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_MedicalCompany1Member" xlink:label="loc_mmsi_MedicalCompany1Member_21C44BAC1BE53E59F36F8173C914DEE5" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:to="loc_mmsi_MedicalCompany1Member_21C44BAC1BE53E59F36F8173C914DEE5" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BlockadeMedicalLlcMember" xlink:label="loc_mmsi_BlockadeMedicalLlcMember_930DC1B5D8FA854A12AD8173C914C1B6" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:to="loc_mmsi_BlockadeMedicalLlcMember_930DC1B5D8FA854A12AD8173C914C1B6" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_LeMaitreVascularInc.Member" xlink:label="loc_mmsi_LeMaitreVascularInc.Member_FA5A7ABAA3973074D8B78173C914D03F" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:to="loc_mmsi_LeMaitreVascularInc.Member_FA5A7ABAA3973074D8B78173C914D03F" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CatchMedicalLLCMember" xlink:label="loc_mmsi_CatchMedicalLLCMember_0413433CBF451E7F09568173C914ED94" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:to="loc_mmsi_CatchMedicalLLCMember_0413433CBF451E7F09568173C914ED94" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DistalAccessLLCMember" xlink:label="loc_mmsi_DistalAccessLLCMember_BC065BDDBE1D25D5B7998173C914CFF3" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:to="loc_mmsi_DistalAccessLLCMember_BC065BDDBE1D25D5B7998173C914CFF3" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_TeleflexIncorporatedMember" xlink:label="loc_mmsi_TeleflexIncorporatedMember_D07392EF03A734A9359F8173C9147854" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:to="loc_mmsi_TeleflexIncorporatedMember_D07392EF03A734A9359F8173C9147854" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CatheterConnectionsInc.Member" xlink:label="loc_mmsi_CatheterConnectionsInc.Member_FCF180A7972DBBABEE2A8173C9148B2D" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:to="loc_mmsi_CatheterConnectionsInc.Member_FCF180A7972DBBABEE2A8173C9148B2D" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_MedicalCompany2Member" xlink:label="loc_mmsi_MedicalCompany2Member_9CD6E2FE0CB06932DD538173C9143B4E" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:to="loc_mmsi_MedicalCompany2Member_9CD6E2FE0CB06932DD538173C9143B4E" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_MedicalCompany3Member" xlink:label="loc_mmsi_MedicalCompany3Member_2EA322A2BF056889C8068173C914D2F1" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C7C02C6F1B213DD0EE0B8173C9132E1D" xlink:to="loc_mmsi_MedicalCompany3Member_2EA322A2BF056889C8068173C914D2F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_194B80DAEF2325B5E8A98173C915078E" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9F2CC350B3BA4A6FF1E98173C911327E" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_194B80DAEF2325B5E8A98173C915078E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="loc_us-gaap_LossContingencyNatureDomain_BD3BF00C840EE62B82F38173C9153AAF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_194B80DAEF2325B5E8A98173C915078E" xlink:to="loc_us-gaap_LossContingencyNatureDomain_BD3BF00C840EE62B82F38173C9153AAF" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_AdditionalPaymentsforLicenseAgreementMilestoneMember" xlink:label="loc_mmsi_AdditionalPaymentsforLicenseAgreementMilestoneMember_B9FB1176F26460F06F8F8173C9155669" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LossContingencyNatureDomain_BD3BF00C840EE62B82F38173C9153AAF" xlink:to="loc_mmsi_AdditionalPaymentsforLicenseAgreementMilestoneMember_B9FB1176F26460F06F8F8173C9155669" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0D8155B25529235F42FB8173C915A546" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9F2CC350B3BA4A6FF1E98173C911327E" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0D8155B25529235F42FB8173C915A546" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6BA0579096043EF0A7378173C91512DB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0D8155B25529235F42FB8173C915A546" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6BA0579096043EF0A7378173C91512DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LicensingAgreementsMember" xlink:label="loc_us-gaap_LicensingAgreementsMember_2CAD1330AD8250BF1A298173C915D192" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6BA0579096043EF0A7378173C91512DB" xlink:to="loc_us-gaap_LicensingAgreementsMember_2CAD1330AD8250BF1A298173C915D192" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_74D94102D1E7CB5FA1588173C915A477" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6BA0579096043EF0A7378173C91512DB" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_74D94102D1E7CB5FA1588173C915A477" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CustomerListsMember" xlink:label="loc_us-gaap_CustomerListsMember_F15869A891005D6407D38173C91529FD" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6BA0579096043EF0A7378173C91512DB" xlink:to="loc_us-gaap_CustomerListsMember_F15869A891005D6407D38173C91529FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DistributionRightsMember" xlink:label="loc_us-gaap_DistributionRightsMember_E6B8C8E3FEDFF696DDDC8173C9161EAA" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6BA0579096043EF0A7378173C91512DB" xlink:to="loc_us-gaap_DistributionRightsMember_E6B8C8E3FEDFF696DDDC8173C9161EAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_52621B77E6B5F948F0F18173C916ACCA" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6BA0579096043EF0A7378173C91512DB" xlink:to="loc_us-gaap_TrademarksMember_52621B77E6B5F948F0F18173C916ACCA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_F6B58E3C40E4B13766218173C9163E22" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9F2CC350B3BA4A6FF1E98173C911327E" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_F6B58E3C40E4B13766218173C9163E22" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2025FB9D9FBDE092A41E8173C91699AF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_F6B58E3C40E4B13766218173C9163E22" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2025FB9D9FBDE092A41E8173C91699AF" xlink:type="arc" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2025FB9D9FBDE092A41E8173C91699AF" xlink:to="loc_mmsi_BluegrassVascularTechnologiesInc.Member_0A95D419304DC8D7B6628173C9134AAF" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DFINEInc.Member" xlink:label="loc_mmsi_DFINEInc.Member_6C50A6B26D81F8B631878173C916467A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2025FB9D9FBDE092A41E8173C91699AF" xlink:to="loc_mmsi_DFINEInc.Member_6C50A6B26D81F8B631878173C916467A" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_HeROGraftMember" xlink:label="loc_mmsi_HeROGraftMember_741CF1FAD1F140D533008173C9163B5D" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2025FB9D9FBDE092A41E8173C91699AF" xlink:to="loc_mmsi_HeROGraftMember_741CF1FAD1F140D533008173C9163B5D" xlink:type="arc" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2025FB9D9FBDE092A41E8173C91699AF" xlink:to="loc_mmsi_CardiovascularSegmentMember_11E6AFE6D7C97E7AC0898173C9124FD9" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_XablecathInc.Member" xlink:label="loc_mmsi_XablecathInc.Member_D5D1D42C7374C689E18B8173C9172B60" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2025FB9D9FBDE092A41E8173C91699AF" xlink:to="loc_mmsi_XablecathInc.Member_D5D1D42C7374C689E18B8173C9172B60" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_QuellentLLCMember" xlink:label="loc_mmsi_QuellentLLCMember_5C19E2DB836B547D5E9F8173C917C664" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2025FB9D9FBDE092A41E8173C91699AF" xlink:to="loc_mmsi_QuellentLLCMember_5C19E2DB836B547D5E9F8173C917C664" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_LimitedLiabilityCompanyAcquisitionMember" xlink:label="loc_mmsi_LimitedLiabilityCompanyAcquisitionMember_01D82E5CE3993E248F328173C917A273" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2025FB9D9FBDE092A41E8173C91699AF" xlink:to="loc_mmsi_LimitedLiabilityCompanyAcquisitionMember_01D82E5CE3993E248F328173C917A273" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_GMedixMember" xlink:label="loc_mmsi_GMedixMember_0FEA52548490805E031A8173C917A247" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2025FB9D9FBDE092A41E8173C91699AF" xlink:to="loc_mmsi_GMedixMember_0FEA52548490805E031A8173C917A247" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_9F2CC350B3BA4A6FF1E98173C911327E" xlink:to="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_EAD189A356A8DAB4F4298173C9187B6C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_EAD189A356A8DAB4F4298173C9187B6C" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CostMethodInvestmentsInterestAcquiredNumberOfUnits" xlink:label="loc_mmsi_CostMethodInvestmentsInterestAcquiredNumberOfUnits_3D2005FD4ED998B9F94F8173C918F66A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_mmsi_CostMethodInvestmentsInterestAcquiredNumberOfUnits_3D2005FD4ED998B9F94F8173C918F66A" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CostMethodInvestmentsOwnershipPercentage" xlink:label="loc_mmsi_CostMethodInvestmentsOwnershipPercentage_4D9FA7BF00C8B6AFE8A98173C9183E48" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_mmsi_CostMethodInvestmentsOwnershipPercentage_4D9FA7BF00C8B6AFE8A98173C9183E48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostMethodInvestments" xlink:label="loc_us-gaap_CostMethodInvestments_5ED4242B35A1664554E28173C918ABF9" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_CostMethodInvestments_5ED4242B35A1664554E28173C918ABF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_CC327F59E424A75D00B88173C9181F71" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_CC327F59E424A75D00B88173C9181F71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_5134B0E9E61293D912548173C9186283" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_5134B0E9E61293D912548173C9186283" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_7A1077C74D5C96946BC88173C91813AE" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_7A1077C74D5C96946BC88173C91813AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferredOther1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferredOther1_E7A28EBC22E1FB629C4B8173C919364B" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferredOther1_E7A28EBC22E1FB629C4B8173C919364B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_C7BF04266AAC88D3F6128173C9191E23" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred_C7BF04266AAC88D3F6128173C9191E23" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory_A6011A2689A2E55BD8998173C9195AF9" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentInventory_A6011A2689A2E55BD8998173C9195AF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment_AA4823E6EF0A6334B5E68173C919032F" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentPropertyPlantAndEquipment_AA4823E6EF0A6334B5E68173C919032F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillPurchaseAccountingAdjustments" xlink:label="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_8EC0AB6B8DBBE3CC36848173C919D4FC" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_GoodwillPurchaseAccountingAdjustments_8EC0AB6B8DBBE3CC36848173C919D4FC" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedExpenses" xlink:label="loc_mmsi_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedExpenses_F84770780E9CFED1B5E78173C9194FA4" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_mmsi_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccruedExpenses_F84770780E9CFED1B5E78173C9194FA4" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxLiabilities" xlink:label="loc_mmsi_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxLiabilities_AE4ED0DD3A3E002231428173C919E6C6" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_mmsi_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentDeferredTaxLiabilities_AE4ED0DD3A3E002231428173C919E6C6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_F4F67E2F067931A485EC8173C91ACEAE" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_F4F67E2F067931A485EC8173C91ACEAE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_92EE93F3B72B448E92658173C91A506E" xlink:type="locator" />
    <link:presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_92EE93F3B72B448E92658173C91A506E" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsTradeReceivablesGross" xlink:label="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsTradeReceivablesGross_19CFF0AFDA1A8EA86E558173C91A1014" xlink:type="locator" />
    <link:presentationArc order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsTradeReceivablesGross_19CFF0AFDA1A8EA86E558173C91A1014" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsTradeReceivablesAllowanceforDoubtfulAccounts" xlink:label="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsTradeReceivablesAllowanceforDoubtfulAccounts_F7E343EDB59A1A2C8FFC8173C91AA6C8" xlink:type="locator" />
    <link:presentationArc order="18" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsTradeReceivablesAllowanceforDoubtfulAccounts_F7E343EDB59A1A2C8FFC8173C91AA6C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_E24F557AB5218F54F9E48173C91AA297" xlink:type="locator" />
    <link:presentationArc order="19" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_E24F557AB5218F54F9E48173C91AA297" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_A9640B5FA213EAC8B6FC8173C91A607A" xlink:type="locator" />
    <link:presentationArc order="20" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual_A9640B5FA213EAC8B6FC8173C91A607A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_84711EE1E8AB8762E1918173C91A3533" xlink:type="locator" />
    <link:presentationArc order="21" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_PaymentsToAcquireIntangibleAssets_84711EE1E8AB8762E1918173C91A3533" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedLicenseAgreementsGross" xlink:label="loc_us-gaap_FiniteLivedLicenseAgreementsGross_6B8F44BB811C9444E0EC8173C91A3948" xlink:type="locator" />
    <link:presentationArc order="22" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_FiniteLivedLicenseAgreementsGross_6B8F44BB811C9444E0EC8173C91A3948" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_AcquisitionPurchasesinAccruedExpenses" xlink:label="loc_mmsi_AcquisitionPurchasesinAccruedExpenses_2641F92C9EFE00C0BF698173C91A5189" xlink:type="locator" />
    <link:presentationArc order="23" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_mmsi_AcquisitionPurchasesinAccruedExpenses_2641F92C9EFE00C0BF698173C91A5189" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_D6AD1B2A934B356702758173C91B926A" xlink:type="locator" />
    <link:presentationArc order="24" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_D6AD1B2A934B356702758173C91B926A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_15821590A0BD7FB8333A8173C91B6968" xlink:type="locator" />
    <link:presentationArc order="25" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_15821590A0BD7FB8333A8173C91B6968" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff" xlink:label="loc_us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff_131B8FE99AF2EE24A2968173C91B7721" xlink:type="locator" />
    <link:presentationArc order="26" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff_131B8FE99AF2EE24A2968173C91B7721" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_AcquisitionPurchasesinLongtermObligations" xlink:label="loc_mmsi_AcquisitionPurchasesinLongtermObligations_58AD0BBBDE108692DD8C8173C91B8547" xlink:type="locator" />
    <link:presentationArc order="27" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_mmsi_AcquisitionPurchasesinLongtermObligations_58AD0BBBDE108692DD8C8173C91B8547" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_FuturePaymentsUnderPurchaseAgreement" xlink:label="loc_mmsi_FuturePaymentsUnderPurchaseAgreement_E85DA5609AAEC3510A738173C91B31BA" xlink:type="locator" />
    <link:presentationArc order="28" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_mmsi_FuturePaymentsUnderPurchaseAgreement_E85DA5609AAEC3510A738173C91B31BA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_844DA358D4968938541F8173C91BB825" xlink:type="locator" />
    <link:presentationArc order="29" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_844DA358D4968938541F8173C91BB825" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_FinitelivedIntangibleAssetsAcquiredLiabilitiesIncurred" xlink:label="loc_mmsi_FinitelivedIntangibleAssetsAcquiredLiabilitiesIncurred_A76B49F9AE3A059AC0748173C91BFB14" xlink:type="locator" />
    <link:presentationArc order="30" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_mmsi_FinitelivedIntangibleAssetsAcquiredLiabilitiesIncurred_A76B49F9AE3A059AC0748173C91BFB14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_5693D39F2795DC5724A98173C91BA08B" xlink:type="locator" />
    <link:presentationArc order="31" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_5693D39F2795DC5724A98173C91BA08B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_BC11212A7ED2A02EEA6D8173C91B37E3" xlink:type="locator" />
    <link:presentationArc order="32" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_57413EC29EFF9138F8618173C917818D" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_BC11212A7ED2A02EEA6D8173C91B37E3" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/AcquisitionsPurchasePriceAllocationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_A6A1A7F4A2BAFA3B3068811DF0F7121C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_E2CFB15ABAA39610C4A6811DF0F85F26" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_A6A1A7F4A2BAFA3B3068811DF0F7121C" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_E2CFB15ABAA39610C4A6811DF0F85F26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_40C9F35CF6518DF9A28F811DF0F8EF2D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_E2CFB15ABAA39610C4A6811DF0F85F26" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_40C9F35CF6518DF9A28F811DF0F8EF2D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_BD53BF60020E905C1579811DF0FC8A73" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_40C9F35CF6518DF9A28F811DF0F8EF2D" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_BD53BF60020E905C1579811DF0FC8A73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_39DF6D5F301BEA68F282811DF0FD4E3C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_BD53BF60020E905C1579811DF0FC8A73" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_39DF6D5F301BEA68F282811DF0FD4E3C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CustomerListsMember" xlink:label="loc_us-gaap_CustomerListsMember_96E26C985965F5714D8A811DF0FD1706" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_BD53BF60020E905C1579811DF0FC8A73" xlink:to="loc_us-gaap_CustomerListsMember_96E26C985965F5714D8A811DF0FD1706" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_622022704B50D010882F811DF0FD116E" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_BD53BF60020E905C1579811DF0FC8A73" xlink:to="loc_us-gaap_TrademarksMember_622022704B50D010882F811DF0FD116E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_E98F66027716BF1124E6811DF0FD4106" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_E2CFB15ABAA39610C4A6811DF0F85F26" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_E98F66027716BF1124E6811DF0FD4106" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2BE6F934F293197BA58E811DF0FED055" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_E98F66027716BF1124E6811DF0FD4106" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2BE6F934F293197BA58E811DF0FED055" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_HeROGraftMember" xlink:label="loc_mmsi_HeROGraftMember_6295F5981CC0CA097D02811DF0FEEC18" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2BE6F934F293197BA58E811DF0FED055" xlink:to="loc_mmsi_HeROGraftMember_6295F5981CC0CA097D02811DF0FEEC18" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DFINEInc.Member" xlink:label="loc_mmsi_DFINEInc.Member_75AED09EB33ECD6111F2811DF0FFA979" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2BE6F934F293197BA58E811DF0FED055" xlink:to="loc_mmsi_DFINEInc.Member_75AED09EB33ECD6111F2811DF0FFA979" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_8E8F26D2FC845AFACCE1811DF0FF99C5" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_E2CFB15ABAA39610C4A6811DF0F85F26" xlink:to="loc_us-gaap_BusinessAcquisitionLineItems_8E8F26D2FC845AFACCE1811DF0FF99C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_A53DBA8B397F1824E2B6811DF0FF8B3C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8E8F26D2FC845AFACCE1811DF0FF99C5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_A53DBA8B397F1824E2B6811DF0FF8B3C" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsTradeReceivables" xlink:label="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsTradeReceivables_68E0916CF82D1C992C7C811DF0FF3711" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_A53DBA8B397F1824E2B6811DF0FF8B3C" xlink:to="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsTradeReceivables_68E0916CF82D1C992C7C811DF0FF3711" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsOtherReceivables" xlink:label="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsOtherReceivables_67A9FBE912D1B6884EC6811DF0FF1E8A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_A53DBA8B397F1824E2B6811DF0FF8B3C" xlink:to="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedCurrentAssetsOtherReceivables_67A9FBE912D1B6884EC6811DF0FF1E8A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_2AD7563593470F82280B811DF1006AD5" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_A53DBA8B397F1824E2B6811DF0FF8B3C" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_2AD7563593470F82280B811DF1006AD5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_5DC89A5E0EBB113BC14B811DF1006BA3" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_A53DBA8B397F1824E2B6811DF0FF8B3C" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_5DC89A5E0EBB113BC14B811DF1006BA3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_42D9176A47ADAA175F40811DF1014711" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_A53DBA8B397F1824E2B6811DF0FF8B3C" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_42D9176A47ADAA175F40811DF1014711" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_17BB89A6F7D3C56F1E0F811DF1014F3E" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_A53DBA8B397F1824E2B6811DF0FF8B3C" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_17BB89A6F7D3C56F1E0F811DF1014F3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_948EB97ED3B5266F37C5811DF101E346" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_A53DBA8B397F1824E2B6811DF0FF8B3C" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_948EB97ED3B5266F37C5811DF101E346" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_FE872AFA1B9E009A4784811DF101E635" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_A53DBA8B397F1824E2B6811DF0FF8B3C" xlink:to="loc_us-gaap_Goodwill_FE872AFA1B9E009A4784811DF101E635" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill" xlink:label="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill_EFF321BD33F430FB007E811DF101B03A" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_A53DBA8B397F1824E2B6811DF0FF8B3C" xlink:to="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill_EFF321BD33F430FB007E811DF101B03A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_70FE247912696F3982A4811DF1010BEC" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8E8F26D2FC845AFACCE1811DF0FF99C5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_70FE247912696F3982A4811DF1010BEC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_34B807ACE222EC693C4F811DF101E840" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_70FE247912696F3982A4811DF1010BEC" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_34B807ACE222EC693C4F811DF101E840" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_C25EBC9F1D5215C8DA38811DF102C60C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_70FE247912696F3982A4811DF1010BEC" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_C25EBC9F1D5215C8DA38811DF102C60C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesCurrent" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesCurrent_270503052C2074389D38811DF102F976" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_70FE247912696F3982A4811DF1010BEC" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesCurrent_270503052C2074389D38811DF102F976" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent_8B4DD9EB7E92019DF2D1811DF102C497" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_70FE247912696F3982A4811DF1010BEC" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent_8B4DD9EB7E92019DF2D1811DF102C497" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_1693E3E14DC59EAE32B9811DF102D5BD" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_70FE247912696F3982A4811DF1010BEC" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_1693E3E14DC59EAE32B9811DF102D5BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_771911BC4754E1D99C5D811DF1030B3A" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8E8F26D2FC845AFACCE1811DF0FF99C5" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_771911BC4754E1D99C5D811DF1030B3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_3312451A35D804DE8F40811E2E62B10E" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_8E8F26D2FC845AFACCE1811DF0FF99C5" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_3312451A35D804DE8F40811E2E62B10E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/AcquisitionsSummaryOfUnauditedConsolidatedResultsOfOperationsIncludingProformaResultsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_4B4EAC2A63C7BA1C17E480C02850F85E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossAbstract" xlink:label="loc_us-gaap_NetIncomeLossAbstract_D866862FC250AB65AB5380C028509B68" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_4B4EAC2A63C7BA1C17E480C02850F85E" xlink:to="loc_us-gaap_NetIncomeLossAbstract_D866862FC250AB65AB5380C028509B68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_us-gaap_SalesRevenueGoodsNet_28C89E4F88D4DC3FCB5680C028504E09" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetIncomeLossAbstract_D866862FC250AB65AB5380C028509B68" xlink:to="loc_us-gaap_SalesRevenueGoodsNet_28C89E4F88D4DC3FCB5680C028504E09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_A3A1ECDC646D99FAAAFA80C02850E1F1" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetIncomeLossAbstract_D866862FC250AB65AB5380C028509B68" xlink:to="loc_us-gaap_NetIncomeLoss_A3A1ECDC646D99FAAAFA80C02850E1F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_505822FF5B13B436461180C02850B44F" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetIncomeLossAbstract_D866862FC250AB65AB5380C028509B68" xlink:to="loc_us-gaap_EarningsPerShareBasic_505822FF5B13B436461180C02850B44F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_E8BBD92CA43EC70524AF80C028563544" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetIncomeLossAbstract_D866862FC250AB65AB5380C028509B68" xlink:to="loc_us-gaap_EarningsPerShareDiluted_E8BBD92CA43EC70524AF80C028563544" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationAbstract" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_B12C9545959B64C21A1280C028568A65" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_4B4EAC2A63C7BA1C17E480C02850F85E" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_B12C9545959B64C21A1280C028568A65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_6789C4B50AE68F2A6DC280C02856881B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_B12C9545959B64C21A1280C028568A65" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_6789C4B50AE68F2A6DC280C02856881B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_FAF8D3845D0760079D7A80C0285681C2" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_B12C9545959B64C21A1280C028568A65" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_FAF8D3845D0760079D7A80C0285681C2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic_A1EE49F153914B144D1080C028562056" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_B12C9545959B64C21A1280C028568A65" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic_A1EE49F153914B144D1080C028562056" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted_714E07AC1D1CD65A768780C0285610A6" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionProFormaInformationAbstract_B12C9545959B64C21A1280C028568A65" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted_714E07AC1D1CD65A768780C0285610A6" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/AcquisitionsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_5CC2C1C948B5FEE6AA788114F889A50C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_37AB920D0C23E0BD62028114F8894C11" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_5CC2C1C948B5FEE6AA788114F889A50C" xlink:to="loc_us-gaap_ScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedTableTextBlock_37AB920D0C23E0BD62028114F8894C11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationTextBlock" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_289750F825000AB4AEF78114F889C02A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_5CC2C1C948B5FEE6AA788114F889A50C" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaInformationTextBlock_289750F825000AB4AEF78114F889C02A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/CommitmentsAndContingencies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_CEBF36BDC39E8B50A26BD27CC9C1AF60" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_94CADEDF0CF7CB782713D27CC9C1F2EC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_CEBF36BDC39E8B50A26BD27CC9C1AF60" xlink:to="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_94CADEDF0CF7CB782713D27CC9C1F2EC" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/CommitmentsAndContingenciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2EE4AD38EDBF0A50F48D8173C7CB6820" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherCommitmentsTable" xlink:label="loc_us-gaap_OtherCommitmentsTable_CE0FB74D7266D5D053128173C7CCF36E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2EE4AD38EDBF0A50F48D8173C7CB6820" xlink:to="loc_us-gaap_OtherCommitmentsTable_CE0FB74D7266D5D053128173C7CCF36E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_7973F1792790EBA9E6F18173C7CC6FEB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsTable_CE0FB74D7266D5D053128173C7CCF36E" xlink:to="loc_us-gaap_RangeAxis_7973F1792790EBA9E6F18173C7CC6FEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_C91E9637034A2FFAE9498173C7CCA681" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_7973F1792790EBA9E6F18173C7CC6FEB" xlink:to="loc_us-gaap_RangeMember_C91E9637034A2FFAE9498173C7CCA681" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_7896C1CB13CCAD80C2778173C7CC1EA5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_C91E9637034A2FFAE9498173C7CCA681" xlink:to="loc_us-gaap_MinimumMember_7896C1CB13CCAD80C2778173C7CC1EA5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_0720C5DC64B3A29D7B788173C7CC0CB1" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_C91E9637034A2FFAE9498173C7CCA681" xlink:to="loc_us-gaap_MaximumMember_0720C5DC64B3A29D7B788173C7CC0CB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherCommitmentsLineItems" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_0919956D429E16F560098173C7CDB544" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsTable_CE0FB74D7266D5D053128173C7CCF36E" xlink:to="loc_us-gaap_OtherCommitmentsLineItems_0919956D429E16F560098173C7CDB544" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="loc_us-gaap_LeaseAndRentalExpense_E66DC707C992EC0DCDDB8173C7CDA70D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_0919956D429E16F560098173C7CDB544" xlink:to="loc_us-gaap_LeaseAndRentalExpense_E66DC707C992EC0DCDDB8173C7CDA70D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities" xlink:label="loc_us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities_981E1C9E35A834F079B98173C7CD6A2F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_0919956D429E16F560098173C7CDB544" xlink:to="loc_us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities_981E1C9E35A834F079B98173C7CD6A2F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract" xlink:label="loc_us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract_7634498FEF4E8F98DB4F8173C7CECDE6" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_0919956D429E16F560098173C7CDB544" xlink:to="loc_us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract_7634498FEF4E8F98DB4F8173C7CECDE6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredCreditsAndOtherLiabilities" xlink:label="loc_us-gaap_DeferredCreditsAndOtherLiabilities_DBFC10FCF1C45BBA2DF98173C7CEFEFE" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_0919956D429E16F560098173C7CDB544" xlink:to="loc_us-gaap_DeferredCreditsAndOtherLiabilities_DBFC10FCF1C45BBA2DF98173C7CEFEFE" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DecreaseinOperatingExpenseGrantsforPropertyPlantandEquipment" xlink:label="loc_mmsi_DecreaseinOperatingExpenseGrantsforPropertyPlantandEquipment_D1D3555E5FEBF15688E68173C7CE563B" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_0919956D429E16F560098173C7CDB544" xlink:to="loc_mmsi_DecreaseinOperatingExpenseGrantsforPropertyPlantandEquipment_D1D3555E5FEBF15688E68173C7CE563B" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_OtherCommitmentForeignGovernmentGrantLiabilityPeriod" xlink:label="loc_mmsi_OtherCommitmentForeignGovernmentGrantLiabilityPeriod_BB91D1C114FA094E81A18173C7CE5EB9" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_0919956D429E16F560098173C7CDB544" xlink:to="loc_mmsi_OtherCommitmentForeignGovernmentGrantLiabilityPeriod_BB91D1C114FA094E81A18173C7CE5EB9" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_GrantRefundableforDiscontinuedOperations" xlink:label="loc_mmsi_GrantRefundableforDiscontinuedOperations_1B69B2A2CF488DCD1AD88173C7CEA30B" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_0919956D429E16F560098173C7CDB544" xlink:to="loc_mmsi_GrantRefundableforDiscontinuedOperations_1B69B2A2CF488DCD1AD88173C7CEA30B" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_OtherCommitmentForeignGovernmentGrantLiabilityRemainingPeriod" xlink:label="loc_mmsi_OtherCommitmentForeignGovernmentGrantLiabilityRemainingPeriod_58C99604BB6F893DBA348173C7CEEBF2" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_0919956D429E16F560098173C7CDB544" xlink:to="loc_mmsi_OtherCommitmentForeignGovernmentGrantLiabilityRemainingPeriod_58C99604BB6F893DBA348173C7CEEBF2" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/CommitmentsAndContingenciesScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2606E28C2708E8DD8B7ED27CC9438278" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_CA31FF91085D998D24E0D27CC94493C6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2606E28C2708E8DD8B7ED27CC9438278" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_CA31FF91085D998D24E0D27CC94493C6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_CEBEA5F5858ADE73D297D27CC9441F29" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2606E28C2708E8DD8B7ED27CC9438278" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_CEBEA5F5858ADE73D297D27CC9441F29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E2139704551B6D48836AD27CC94499ED" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2606E28C2708E8DD8B7ED27CC9438278" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_E2139704551B6D48836AD27CC94499ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_A52648D5FA149A5DD38CD27CC9444D25" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2606E28C2708E8DD8B7ED27CC9438278" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_A52648D5FA149A5DD38CD27CC9444D25" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_0C2A6C8622DCB6729C54D27CC9446A4C" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2606E28C2708E8DD8B7ED27CC9438278" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_0C2A6C8622DCB6729C54D27CC9446A4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_A97EDC5F7F400E969DEFD27CC9444A8C" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2606E28C2708E8DD8B7ED27CC9438278" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_A97EDC5F7F400E969DEFD27CC9444A8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_93DA028FC1629D889334D27CC944FFB0" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_2606E28C2708E8DD8B7ED27CC9438278" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_93DA028FC1629D889334D27CC944FFB0" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/CommitmentsAndContingenciesTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_1B4F5942B0E61D40C083D27CCACC9AE8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_B5D4AB1DBBFC85D36DD4D27CCACC3B40" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_1B4F5942B0E61D40C083D27CCACC9AE8" xlink:to="loc_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_B5D4AB1DBBFC85D36DD4D27CCACC3B40" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_BC0EEB5F3A88ADFED7CE8105CC874148" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_F51E007C23F317C221118105CC87F4A7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_BC0EEB5F3A88ADFED7CE8105CC874148" xlink:to="loc_us-gaap_StatementTable_F51E007C23F317C221118105CC87F4A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_67A33C2F850668863FEE8105CC88A980" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_F51E007C23F317C221118105CC87F4A7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_67A33C2F850668863FEE8105CC88A980" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_395DDF64A45599BB78E38105CC885899" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_67A33C2F850668863FEE8105CC88A980" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_395DDF64A45599BB78E38105CC885899" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_69E8FF2F5F710008F0968105CC88E8D3" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_395DDF64A45599BB78E38105CC885899" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_69E8FF2F5F710008F0968105CC88E8D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_16CB2BDC8FECCC78284D8105CC88CF37" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_395DDF64A45599BB78E38105CC885899" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_16CB2BDC8FECCC78284D8105CC88CF37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_9C90087F47475C5545198105CC89473A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_F51E007C23F317C221118105CC87F4A7" xlink:to="loc_us-gaap_StatementLineItems_9C90087F47475C5545198105CC89473A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_4DC1638CCBAD44BA88458105CC891585" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9C90087F47475C5545198105CC89473A" xlink:to="loc_us-gaap_AssetsAbstract_4DC1638CCBAD44BA88458105CC891585" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_4DC1638CCBAD44BA88458105CC891585" xlink:to="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6024A712F23598B2F6F98105CC89C104" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6024A712F23598B2F6F98105CC89C104" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_E11832D4D906839077768105CC89D60A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_E11832D4D906839077768105CC89D60A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DueFromEmployeesCurrent" xlink:label="loc_us-gaap_DueFromEmployeesCurrent_1A2BC8E9B35F4AA764338105CC89E315" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:to="loc_us-gaap_DueFromEmployeesCurrent_1A2BC8E9B35F4AA764338105CC89E315" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NontradeReceivablesCurrent" xlink:label="loc_us-gaap_NontradeReceivablesCurrent_3CBB2F1885797781DBB28105CC89BF05" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:to="loc_us-gaap_NontradeReceivablesCurrent_3CBB2F1885797781DBB28105CC89BF05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_06AEE816E17689B88D4D8105CC8A8DF2" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:to="loc_us-gaap_InventoryNet_06AEE816E17689B88D4D8105CC8A8DF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_0F5FCE973960531761A48105CC8A61D9" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_0F5FCE973960531761A48105CC8A61D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PrepaidTaxes" xlink:label="loc_us-gaap_PrepaidTaxes_B32B2B21D0374CD9BB278105CC8A60FA" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:to="loc_us-gaap_PrepaidTaxes_B32B2B21D0374CD9BB278105CC8A60FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetCurrent_2ADB817EBFA85EAD45EB8105CC8A8EC9" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:to="loc_us-gaap_DeferredTaxAssetsNetCurrent_2ADB817EBFA85EAD45EB8105CC8A8EC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxesReceivable" xlink:label="loc_us-gaap_IncomeTaxesReceivable_C63F5F9280EA643776DC8105CC8A172A" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:to="loc_us-gaap_IncomeTaxesReceivable_C63F5F9280EA643776DC8105CC8A172A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_404FA7E9498C795080FB8105CC8AE5A0" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_57F5A4D631761C8E61958105CC89825A" xlink:to="loc_us-gaap_AssetsCurrent_404FA7E9498C795080FB8105CC8AE5A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_8E8CFB24350A3954427C8105CC8AC81B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_4DC1638CCBAD44BA88458105CC891585" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_8E8CFB24350A3954427C8105CC8AC81B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Land" xlink:label="loc_us-gaap_Land_8F728CBA4B768904D6A48105CC8B96FB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_8E8CFB24350A3954427C8105CC8AC81B" xlink:to="loc_us-gaap_Land_8F728CBA4B768904D6A48105CC8B96FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BuildingsAndImprovementsGross" xlink:label="loc_us-gaap_BuildingsAndImprovementsGross_6022E82C0DAEC6BD535F8105CC8B9939" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_8E8CFB24350A3954427C8105CC8AC81B" xlink:to="loc_us-gaap_BuildingsAndImprovementsGross_6022E82C0DAEC6BD535F8105CC8B9939" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MachineryAndEquipmentGross" xlink:label="loc_us-gaap_MachineryAndEquipmentGross_FA556319A30FD6564D9E8105CC8B22CF" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_8E8CFB24350A3954427C8105CC8AC81B" xlink:to="loc_us-gaap_MachineryAndEquipmentGross_FA556319A30FD6564D9E8105CC8B22CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FurnitureAndFixturesGross" xlink:label="loc_us-gaap_FurnitureAndFixturesGross_7415196C1EF0D1596E8E8105CC8B9E03" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_8E8CFB24350A3954427C8105CC8AC81B" xlink:to="loc_us-gaap_FurnitureAndFixturesGross_7415196C1EF0D1596E8E8105CC8B9E03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LeaseholdImprovementsGross" xlink:label="loc_us-gaap_LeaseholdImprovementsGross_8F4C54DA42FD753239038105CC8BC161" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_8E8CFB24350A3954427C8105CC8AC81B" xlink:to="loc_us-gaap_LeaseholdImprovementsGross_8F4C54DA42FD753239038105CC8BC161" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConstructionInProgressGross" xlink:label="loc_us-gaap_ConstructionInProgressGross_C931342136DBD69E9A458105CC8B7AD4" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_8E8CFB24350A3954427C8105CC8AC81B" xlink:to="loc_us-gaap_ConstructionInProgressGross_C931342136DBD69E9A458105CC8B7AD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_869F0D78AC4B11CB43188105CC8BD2F5" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_8E8CFB24350A3954427C8105CC8AC81B" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_869F0D78AC4B11CB43188105CC8BD2F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_4AAA84B111F28C6A7F488105CC8BD861" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_8E8CFB24350A3954427C8105CC8AC81B" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_4AAA84B111F28C6A7F488105CC8BD861" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_368DDCC397F82275EF018105CC8CE538" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_8E8CFB24350A3954427C8105CC8AC81B" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_368DDCC397F82275EF018105CC8CE538" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract" xlink:label="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract_F172523AF1248C24AAAA8105CC8C2A6A" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_4DC1638CCBAD44BA88458105CC891585" xlink:to="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract_F172523AF1248C24AAAA8105CC8C2A6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_2816F9C84795950CCCC68105CC8C9DE3" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract_F172523AF1248C24AAAA8105CC8C2A6A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_2816F9C84795950CCCC68105CC8C9DE3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_4E174EEEFDA0DE72E79F8105CC8C7068" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract_F172523AF1248C24AAAA8105CC8C2A6A" xlink:to="loc_us-gaap_Goodwill_4E174EEEFDA0DE72E79F8105CC8C7068" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsNetNoncurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_C5C48CCE13FE7B3C3CFA8105CC8C0395" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract_F172523AF1248C24AAAA8105CC8C2A6A" xlink:to="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_C5C48CCE13FE7B3C3CFA8105CC8C0395" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_2CCDD03FAF169775F0B88105CC8C41B0" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract_F172523AF1248C24AAAA8105CC8C2A6A" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_2CCDD03FAF169775F0B88105CC8C41B0" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrent" xlink:label="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrent_FE2A76875D6A6BD7B92C8105CC8C0555" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract_F172523AF1248C24AAAA8105CC8C2A6A" xlink:to="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrent_FE2A76875D6A6BD7B92C8105CC8C0555" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_E605A050119677C641408105CC8D82AD" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_4DC1638CCBAD44BA88458105CC891585" xlink:to="loc_us-gaap_Assets_E605A050119677C641408105CC8D82AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_9C90087F47475C5545198105CC89473A" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_AAA2B6DE9E093B68E4A98105CC8DC194" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_AAA2B6DE9E093B68E4A98105CC8DC194" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccountsPayableTradeCurrent" xlink:label="loc_us-gaap_AccountsPayableTradeCurrent_5B5661D501A65F34B6B38105CC8D90CC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_AAA2B6DE9E093B68E4A98105CC8DC194" xlink:to="loc_us-gaap_AccountsPayableTradeCurrent_5B5661D501A65F34B6B38105CC8D90CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_0C7AC4817146674A210E8105CC8D443E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_AAA2B6DE9E093B68E4A98105CC8DC194" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_0C7AC4817146674A210E8105CC8D443E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_76EF5DA856642A73104E8105CC8D28EB" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_AAA2B6DE9E093B68E4A98105CC8DC194" xlink:to="loc_us-gaap_LongTermDebtCurrent_76EF5DA856642A73104E8105CC8D28EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DueToEmployeesCurrent" xlink:label="loc_us-gaap_DueToEmployeesCurrent_0774C5D080F1B6F424368105CC8DC2AC" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_AAA2B6DE9E093B68E4A98105CC8DC194" xlink:to="loc_us-gaap_DueToEmployeesCurrent_0774C5D080F1B6F424368105CC8DC2AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_B90E8FFDAAB5F741803D8105CC8EC9AA" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_AAA2B6DE9E093B68E4A98105CC8DC194" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_B90E8FFDAAB5F741803D8105CC8EC9AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_F0F929D23833C534AECB8105CC8E0607" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_AAA2B6DE9E093B68E4A98105CC8DC194" xlink:to="loc_us-gaap_LiabilitiesCurrent_F0F929D23833C534AECB8105CC8E0607" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_7FD86375EF1B37E727178105CC8E3BE2" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_7FD86375EF1B37E727178105CC8E3BE2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_DDB13301C282532A9CAC8105CC8E82D4" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_DDB13301C282532A9CAC8105CC8E82D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilityForUncertainTaxPositionsNoncurrent" xlink:label="loc_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_5CACB1C00FA3940E289D8105CC8E2C9F" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:to="loc_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_5CACB1C00FA3940E289D8105CC8E2C9F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent" xlink:label="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_0179FE750EABECF1B48C8105CC8E0552" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:to="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_0179FE750EABECF1B48C8105CC8E0552" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherDeferredCreditsNoncurrent" xlink:label="loc_us-gaap_OtherDeferredCreditsNoncurrent_83ABF56655FBB863520A8105CC8E4D97" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:to="loc_us-gaap_OtherDeferredCreditsNoncurrent_83ABF56655FBB863520A8105CC8E4D97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_9B9E0551822233616CBD8105CC8FA8B1" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_9B9E0551822233616CBD8105CC8FA8B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_3275173707654807EA738105CC8F7E8F" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:to="loc_us-gaap_Liabilities_3275173707654807EA738105CC8F7E8F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_5BC36051CF73FBED3E658105CC8F3566" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:to="loc_us-gaap_CommitmentsAndContingencies_5BC36051CF73FBED3E658105CC8F3566" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_5EE745268703D68546A28105CC8F2334" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_5EE745268703D68546A28105CC8F2334" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_26BD2F55F0FBAD0AFACF8105CC8FFD66" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_5EE745268703D68546A28105CC8F2334" xlink:to="loc_us-gaap_PreferredStockValue_26BD2F55F0FBAD0AFACF8105CC8FFD66" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_1768A5ECA986F7E4F06F8105CC8F56BB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_5EE745268703D68546A28105CC8F2334" xlink:to="loc_us-gaap_CommonStockValue_1768A5ECA986F7E4F06F8105CC8F56BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_385B61DD3DB270F942DA8105CC8F6D5C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_5EE745268703D68546A28105CC8F2334" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_385B61DD3DB270F942DA8105CC8F6D5C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_96FAC83555709C04218D8105CC90ECFC" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_5EE745268703D68546A28105CC8F2334" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_96FAC83555709C04218D8105CC90ECFC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_9113D43D28D555074D368105CC90825B" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_5EE745268703D68546A28105CC8F2334" xlink:to="loc_us-gaap_StockholdersEquity_9113D43D28D555074D368105CC90825B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_22404B44111CB81FAA518105CC90E71A" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_DC0045527B87DE84CE058105CC8D2BFA" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_22404B44111CB81FAA518105CC90E71A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_D1BC97D0FF1053D6EFFA47FDCB0615C1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_E1ACBE0E7E4161AFBE7E47FDCB06F699" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_D1BC97D0FF1053D6EFFA47FDCB0615C1" xlink:to="loc_us-gaap_StatementTable_E1ACBE0E7E4161AFBE7E47FDCB06F699" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_8944293FD0DB14D1679347FDCB06FBAF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_E1ACBE0E7E4161AFBE7E47FDCB06F699" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_8944293FD0DB14D1679347FDCB06FBAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1A576BD3A2ECD2883FBE47FDCB06A361" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_8944293FD0DB14D1679347FDCB06FBAF" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1A576BD3A2ECD2883FBE47FDCB06A361" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_708D1FFB42AFFD1BF88147FDCB065E14" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1A576BD3A2ECD2883FBE47FDCB06A361" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_708D1FFB42AFFD1BF88147FDCB065E14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_2C22B7939B48AB2C485E47FDCB061DF5" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_1A576BD3A2ECD2883FBE47FDCB06A361" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_2C22B7939B48AB2C485E47FDCB061DF5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_EA34BFBFEC21661AFF0047FDCB07D0E0" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_E1ACBE0E7E4161AFBE7E47FDCB06F699" xlink:to="loc_us-gaap_StatementLineItems_EA34BFBFEC21661AFF0047FDCB07D0E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_AE31954CB14571A1F1E447FDCB077628" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_EA34BFBFEC21661AFF0047FDCB07D0E0" xlink:to="loc_us-gaap_AssetsCurrentAbstract_AE31954CB14571A1F1E447FDCB077628" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_0D15FFE7B35C5E3B193947FDCB079C83" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_AE31954CB14571A1F1E447FDCB077628" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_0D15FFE7B35C5E3B193947FDCB079C83" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract" xlink:label="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract_7B92415CF49BA72C41B647FDCB078B04" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_EA34BFBFEC21661AFF0047FDCB07D0E0" xlink:to="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract_7B92415CF49BA72C41B647FDCB078B04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_29BDDFE7FBECDD38ADEE47FDCB080BBF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_IntangibleAssetsNetGoodwillAndOtherAssetsNoncurrentAbstract_7B92415CF49BA72C41B647FDCB078B04" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_29BDDFE7FBECDD38ADEE47FDCB080BBF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_F95008E73225F0EDBDAB47FDCB08D32C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_EA34BFBFEC21661AFF0047FDCB07D0E0" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_F95008E73225F0EDBDAB47FDCB08D32C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_FA1A48CA1179980D8EB447FDCB0877B3" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_F95008E73225F0EDBDAB47FDCB08D32C" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_FA1A48CA1179980D8EB447FDCB0877B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_609E99D4F2247458EFD047FDCB08D116" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_F95008E73225F0EDBDAB47FDCB08D32C" xlink:to="loc_us-gaap_PreferredStockSharesIssued_609E99D4F2247458EFD047FDCB08D116" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_10B5CF09723A5A62898D47FDCB082ECE" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_F95008E73225F0EDBDAB47FDCB08D32C" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_10B5CF09723A5A62898D47FDCB082ECE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_70C74493E41043E9122747FDCB087D71" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_F95008E73225F0EDBDAB47FDCB08D32C" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_70C74493E41043E9122747FDCB087D71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_1C11253C8DBE4EF36B4547FDCB0929C3" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_F95008E73225F0EDBDAB47FDCB08D32C" xlink:to="loc_us-gaap_CommonStockSharesIssued_1C11253C8DBE4EF36B4547FDCB0929C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_FCD85AB10829EDED857D47FDCB09F862" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_F95008E73225F0EDBDAB47FDCB08D32C" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_FCD85AB10829EDED857D47FDCB09F862" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_EA79CBF4D75D15D54ED48A81EE229B96" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BC1F1664C87EC1746D5C8A81EE27B981" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_EA79CBF4D75D15D54ED48A81EE229B96" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BC1F1664C87EC1746D5C8A81EE27B981" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_1CD9267DA4733C6B2F038A81EE285081" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BC1F1664C87EC1746D5C8A81EE27B981" xlink:to="loc_us-gaap_NetIncomeLoss_1CD9267DA4733C6B2F038A81EE285081" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BC1F1664C87EC1746D5C8A81EE27B981" xlink:to="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_A2D925A20B033DB9B3528A81EE28163C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_A2D925A20B033DB9B3528A81EE28163C" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_LossOnSaleAndOrAbandonmentOfPropertyAndEquipment" xlink:label="loc_mmsi_LossOnSaleAndOrAbandonmentOfPropertyAndEquipment_A80F6D14780657C3C6EC8A81EE2986CB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:to="loc_mmsi_LossOnSaleAndOrAbandonmentOfPropertyAndEquipment_A80F6D14780657C3C6EC8A81EE2986CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_D7BA651484CB3635E10D8A81EE298DCA" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_D7BA651484CB3635E10D8A81EE298DCA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff" xlink:label="loc_us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff_CCA346B1D21B946DF1DC8A81EE29D0EA" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:to="loc_us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff_CCA346B1D21B946DF1DC8A81EE29D0EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_D0C935D8E8C47E87F8AC8A81EE2AE026" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_D0C935D8E8C47E87F8AC8A81EE2AE026" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAmortizationOfDeferredCharges" xlink:label="loc_us-gaap_OtherAmortizationOfDeferredCharges_8C71CDBF70CB0CD61E1C8A81EE2A306A" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:to="loc_us-gaap_OtherAmortizationOfDeferredCharges_8C71CDBF70CB0CD61E1C8A81EE2A306A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_67782A1BFC5F0AFFB3E98A81EE2AD994" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_67782A1BFC5F0AFFB3E98A81EE2AD994" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_13BA04AD790B62E5275A8A81EE2A5835" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_13BA04AD790B62E5275A8A81EE2A5835" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_DE7F58C9062A931639468A81EE2A53FA" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_DE7F58C9062A931639468A81EE2A53FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_7888B3BE858C3CCAE3F18A81EE2B5366" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_B6787F0455683F465E6B8A81EE28BC3E" xlink:to="loc_us-gaap_ShareBasedCompensation_7888B3BE858C3CCAE3F18A81EE2B5366" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BC1F1664C87EC1746D5C8A81EE27B981" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_C4DB38E070A6CF7D9CED8A81EE2B3A9A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_C4DB38E070A6CF7D9CED8A81EE2B3A9A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDueFromEmployeeCurrent" xlink:label="loc_us-gaap_IncreaseDecreaseInDueFromEmployeeCurrent_DD734500DAA64D4EBC4B8A81EE31AF9C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInDueFromEmployeeCurrent_DD734500DAA64D4EBC4B8A81EE31AF9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherReceivables" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherReceivables_DEC14A5ECF1D19C7FC548A81EE31B6E7" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherReceivables_DEC14A5ECF1D19C7FC548A81EE31B6E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_2F28E30F6F92669257D88A81EE31C499" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_2F28E30F6F92669257D88A81EE31C499" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_03F9B8692A53827BA0D88A81EE31D870" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_03F9B8692A53827BA0D88A81EE31D870" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidTaxes" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidTaxes_23E9315812DC4683377D8A81EE321467" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidTaxes_23E9315812DC4683377D8A81EE321467" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInIncomeTaxesReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInIncomeTaxesReceivable_9B04EB97432FE4873BF28A81EE32359B" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInIncomeTaxesReceivable_9B04EB97432FE4873BF28A81EE32359B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_CB77E83164E9499A7B888A81EE324E43" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_CB77E83164E9499A7B888A81EE324E43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableTrade" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableTrade_DF7E3B7A8E82161D7D258A81EE333D4B" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableTrade_DF7E3B7A8E82161D7D258A81EE333D4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_C8424476283D599AD2C88A81EE333968" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_C8424476283D599AD2C88A81EE333968" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDueToEmployeesCurrent" xlink:label="loc_us-gaap_IncreaseDecreaseInDueToEmployeesCurrent_CFD1EC9FD084688AF3878A81EE3348D2" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInDueToEmployeesCurrent_CFD1EC9FD084688AF3878A81EE3348D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_E04692B102F99EF4D3B28A81EE335CA6" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_E04692B102F99EF4D3B28A81EE335CA6" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_IncreaseDecreaseLiabilityForUncertainTaxPositions" xlink:label="loc_mmsi_IncreaseDecreaseLiabilityForUncertainTaxPositions_064B9D11AF23BF8E5E618A81EE33E3E0" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_mmsi_IncreaseDecreaseLiabilityForUncertainTaxPositions_064B9D11AF23BF8E5E618A81EE33E3E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredCompensation" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredCompensation_6E4F5805CD9BC2753A4F8A81EE34878F" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInDeferredCompensation_6E4F5805CD9BC2753A4F8A81EE34878F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_437DAF1BCBF92DC8E6368A81EE3424B9" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_437DAF1BCBF92DC8E6368A81EE3424B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_A0AAC6DF8EA2CD283C108A81EE34C216" xlink:type="locator" />
    <link:presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_76209F86B9F4E2D9A1308A81EE2B73B1" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_A0AAC6DF8EA2CD283C108A81EE34C216" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_64E7F6A6FB05ECED00448A81EE345EDF" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BC1F1664C87EC1746D5C8A81EE27B981" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_64E7F6A6FB05ECED00448A81EE345EDF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2A32EC9F86CACB4B63318A81EE3ACB15" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_EA79CBF4D75D15D54ED48A81EE229B96" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2A32EC9F86CACB4B63318A81EE3ACB15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssetsAbstract" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssetsAbstract_E317BD2A72C96916D3728A81EE3AEBC1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2A32EC9F86CACB4B63318A81EE3ACB15" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssetsAbstract_E317BD2A72C96916D3728A81EE3AEBC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_8551642B49C966A4C59A8A81EE3A526D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PaymentsToAcquireProductiveAssetsAbstract_E317BD2A72C96916D3728A81EE3AEBC1" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_8551642B49C966A4C59A8A81EE3A526D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_7F8A2834ADE9D80648D98A81EE3B5053" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PaymentsToAcquireProductiveAssetsAbstract_E317BD2A72C96916D3728A81EE3AEBC1" xlink:to="loc_us-gaap_PaymentsToAcquireIntangibleAssets_7F8A2834ADE9D80648D98A81EE3B5053" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities" xlink:label="loc_us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities_0C9D713ACB39D47D174A8A81EE3B7C4B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2A32EC9F86CACB4B63318A81EE3ACB15" xlink:to="loc_us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities_0C9D713ACB39D47D174A8A81EE3B7C4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromSaleOfOtherAssetsInvestingActivities" xlink:label="loc_us-gaap_ProceedsFromSaleOfOtherAssetsInvestingActivities_43C7D989D35358F0561D8A81EE3BC488" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2A32EC9F86CACB4B63318A81EE3ACB15" xlink:to="loc_us-gaap_ProceedsFromSaleOfOtherAssetsInvestingActivities_43C7D989D35358F0561D8A81EE3BC488" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_83D466DE72BAB2EE17B88A81EE3BFD1E" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2A32EC9F86CACB4B63318A81EE3ACB15" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_83D466DE72BAB2EE17B88A81EE3BFD1E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_F6EE7513E50B5D03069B8A81EE3C9345" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2A32EC9F86CACB4B63318A81EE3ACB15" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_F6EE7513E50B5D03069B8A81EE3C9345" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3A9EDCE03AE631C35B0A8A81EE3CCBE8" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2A32EC9F86CACB4B63318A81EE3ACB15" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3A9EDCE03AE631C35B0A8A81EE3CCBE8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_912F2A40936280188A528A81EE3CA8E9" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_EA79CBF4D75D15D54ED48A81EE229B96" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_912F2A40936280188A528A81EE3CA8E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_EF6CB911677D2680EF968A81EE3DEBA2" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_912F2A40936280188A528A81EE3CA8E9" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_EF6CB911677D2680EF968A81EE3DEBA2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_345244F2148724BFEF898A81EE3DAD6C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_912F2A40936280188A528A81EE3CA8E9" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_345244F2148724BFEF898A81EE3DAD6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_A1F01641D07B21A712358A81EE3DC545" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_912F2A40936280188A528A81EE3CA8E9" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_A1F01641D07B21A712358A81EE3DC545" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities" xlink:label="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_2E375480B7CD225C0FA58A81EE3D0BE9" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_912F2A40936280188A528A81EE3CA8E9" xlink:to="loc_us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities_2E375480B7CD225C0FA58A81EE3D0BE9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_9BF78AE2A133DF08C4DD8A81EE3DBABF" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_912F2A40936280188A528A81EE3CA8E9" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_9BF78AE2A133DF08C4DD8A81EE3DBABF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_6E5D9A36675869E267638A81EE42431D" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_912F2A40936280188A528A81EE3CA8E9" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_6E5D9A36675869E267638A81EE42431D" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_PaymentOfTaxesExchangeOfCommonStock" xlink:label="loc_mmsi_PaymentOfTaxesExchangeOfCommonStock_4D2B3CD1A63A2DC18B9D8A81EE432C76" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_912F2A40936280188A528A81EE3CA8E9" xlink:to="loc_mmsi_PaymentOfTaxesExchangeOfCommonStock_4D2B3CD1A63A2DC18B9D8A81EE432C76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2F88BBB2F0A2776C545C8A81EE43D76B" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_912F2A40936280188A528A81EE3CA8E9" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2F88BBB2F0A2776C545C8A81EE43D76B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_0AC58FA8769F20EBC33E8A81EE44008D" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_EA79CBF4D75D15D54ED48A81EE229B96" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_0AC58FA8769F20EBC33E8A81EE44008D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_428D322EF78BCE4E6F698A81EE4451F2" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_EA79CBF4D75D15D54ED48A81EE229B96" xlink:to="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_428D322EF78BCE4E6F698A81EE4451F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract_FEDFC56C63AD0F0CD5DB8A81EE44EDC0" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_EA79CBF4D75D15D54ED48A81EE229B96" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract_FEDFC56C63AD0F0CD5DB8A81EE44EDC0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_15563ADC45018F3A86598A81EE444804" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract_FEDFC56C63AD0F0CD5DB8A81EE44EDC0" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_15563ADC45018F3A86598A81EE444804" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6794473D893976489FDA8A81EE445C3D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValueAbstract_FEDFC56C63AD0F0CD5DB8A81EE44EDC0" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6794473D893976489FDA8A81EE445C3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_8EB70FE05E989D5C8E578A81EE44AD3A" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_EA79CBF4D75D15D54ED48A81EE229B96" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_8EB70FE05E989D5C8E578A81EE44AD3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="loc_us-gaap_InterestPaidNet_17B34013C0113C02BAF68A81EE459B79" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_8EB70FE05E989D5C8E578A81EE44AD3A" xlink:to="loc_us-gaap_InterestPaidNet_17B34013C0113C02BAF68A81EE459B79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_6A73941CD95D059D555F8A81EE456960" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_8EB70FE05E989D5C8E578A81EE44AD3A" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_6A73941CD95D059D555F8A81EE456960" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_6942103F7B3E929356A58A81EE465083" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_EA79CBF4D75D15D54ED48A81EE229B96" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_6942103F7B3E929356A58A81EE465083" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_DCE53B2F5D825A3E357F8A81EE46CC89" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_6942103F7B3E929356A58A81EE465083" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_DCE53B2F5D825A3E357F8A81EE46CC89" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ReceivablefromSaleofPropertyPlantandEquipment" xlink:label="loc_mmsi_ReceivablefromSaleofPropertyPlantandEquipment_329AA2DB4A1A1473ACA48A81EE463A27" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_6942103F7B3E929356A58A81EE465083" xlink:to="loc_mmsi_ReceivablefromSaleofPropertyPlantandEquipment_329AA2DB4A1A1473ACA48A81EE463A27" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_AcquisitionofIntangibleAssetinExchangeforConversionofEquityMethodInvestment" xlink:label="loc_mmsi_AcquisitionofIntangibleAssetinExchangeforConversionofEquityMethodInvestment_5E83E8A8F5C139A8CC718A81EE4606B7" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_6942103F7B3E929356A58A81EE465083" xlink:to="loc_mmsi_AcquisitionofIntangibleAssetinExchangeforConversionofEquityMethodInvestment_5E83E8A8F5C139A8CC718A81EE4606B7" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ContingentReceivableReceivedinExchangeForSaleofCostMethodInvestment" xlink:label="loc_mmsi_ContingentReceivableReceivedinExchangeForSaleofCostMethodInvestment_41869CAD8B4EF221D2CA8A81EE4B58FB" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_6942103F7B3E929356A58A81EE465083" xlink:to="loc_mmsi_ContingentReceivableReceivedinExchangeForSaleofCostMethodInvestment_41869CAD8B4EF221D2CA8A81EE4B58FB" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_AcquisitionOfDevelopedTechnologyInAccruedExpenses" xlink:label="loc_mmsi_AcquisitionOfDevelopedTechnologyInAccruedExpenses_3BCD31F9FC8DF089EA4F8A81EE4C4166" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_6942103F7B3E929356A58A81EE465083" xlink:to="loc_mmsi_AcquisitionOfDevelopedTechnologyInAccruedExpenses_3BCD31F9FC8DF089EA4F8A81EE4C4166" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_StockSurrenderedDuringPeriodValueStockOptionsExercised" xlink:label="loc_mmsi_StockSurrenderedDuringPeriodValueStockOptionsExercised_F4317C854F003EF386BB8A81EE4C2797" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_6942103F7B3E929356A58A81EE465083" xlink:to="loc_mmsi_StockSurrenderedDuringPeriodValueStockOptionsExercised_F4317C854F003EF386BB8A81EE4C2797" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/ConsolidatedStatementsOfCashFlowsParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_8C7468A0F41B41E6C4EFD27CCA163122" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_329EDB3FA32DB08B76E0D27CCA17839F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_8C7468A0F41B41E6C4EFD27CCA163122" xlink:to="loc_us-gaap_StatementTable_329EDB3FA32DB08B76E0D27CCA17839F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_D724632DFF7952E02355D27CCA1795F4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_329EDB3FA32DB08B76E0D27CCA17839F" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_D724632DFF7952E02355D27CCA1795F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_58521B2D5DFD81113C1ED27CCA170DE0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_D724632DFF7952E02355D27CCA1795F4" xlink:to="loc_us-gaap_EquityComponentDomain_58521B2D5DFD81113C1ED27CCA170DE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_1377F35BE2633698E45CD27CCA17F40A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_58521B2D5DFD81113C1ED27CCA170DE0" xlink:to="loc_us-gaap_CommonStockMember_1377F35BE2633698E45CD27CCA17F40A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_CE2429680BB39BDB3666D27CCA170A56" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_329EDB3FA32DB08B76E0D27CCA17839F" xlink:to="loc_us-gaap_StatementLineItems_CE2429680BB39BDB3666D27CCA170A56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestPaidCapitalized" xlink:label="loc_us-gaap_InterestPaidCapitalized_8D619149391ABC41ECABD27CCA177772" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_CE2429680BB39BDB3666D27CCA170A56" xlink:to="loc_us-gaap_InterestPaidCapitalized_8D619149391ABC41ECABD27CCA177772" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_StockSurrenderedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_mmsi_StockSurrenderedDuringPeriodSharesStockOptionsExercised_46D81D45F0FA0DFB362AD27CCA17AE37" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_CE2429680BB39BDB3666D27CCA170A56" xlink:to="loc_mmsi_StockSurrenderedDuringPeriodSharesStockOptionsExercised_46D81D45F0FA0DFB362AD27CCA17AE37" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_9D14E02A056E9CF8327247FDCAEC30E7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_64C3A72D64530BBC355E47FDCAECD3E6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_9D14E02A056E9CF8327247FDCAEC30E7" xlink:to="loc_us-gaap_NetIncomeLoss_64C3A72D64530BBC355E47FDCAECD3E6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_3C243D6C39CAFD2453EE47FDCAEC2642" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_9D14E02A056E9CF8327247FDCAEC30E7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_3C243D6C39CAFD2453EE47FDCAEC2642" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_3FFA42A7324AACD0F06947FDCAEC424C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_9D14E02A056E9CF8327247FDCAEC30E7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_3FFA42A7324AACD0F06947FDCAEC424C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_890B639D1A67FD40979E47FDCAECB893" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_9D14E02A056E9CF8327247FDCAEC30E7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax_890B639D1A67FD40979E47FDCAECB893" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_32C7C1F778B68CED158D47FDCAEC5822" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_9D14E02A056E9CF8327247FDCAEC30E7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_32C7C1F778B68CED158D47FDCAEC5822" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax_CD00E389BEB839AC809747FDCAEC37E8" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_9D14E02A056E9CF8327247FDCAEC30E7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax_CD00E389BEB839AC809747FDCAEC37E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_DB296832C13359A1400D47FDCAEC446A" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_9D14E02A056E9CF8327247FDCAEC30E7" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_DB296832C13359A1400D47FDCAEC446A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_80A1942812DDC8E11C7B47FDCAEDDF2F" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_9D14E02A056E9CF8327247FDCAEC30E7" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_80A1942812DDC8E11C7B47FDCAEDDF2F" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_us-gaap_SalesRevenueGoodsNet_FDE646AC4455041B998BD27CCB456F9A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:to="loc_us-gaap_SalesRevenueGoodsNet_FDE646AC4455041B998BD27CCB456F9A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostOfGoodsSold" xlink:label="loc_us-gaap_CostOfGoodsSold_C4C5623333C9D1DE345FD27CCB4577EA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:to="loc_us-gaap_CostOfGoodsSold_C4C5623333C9D1DE345FD27CCB4577EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_9F2DAC1574FB7C574FBED27CCB45DBA4" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:to="loc_us-gaap_GrossProfit_9F2DAC1574FB7C574FBED27CCB45DBA4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_F56945D924D1A692B715D27CCB45798B" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:to="loc_us-gaap_OperatingExpensesAbstract_F56945D924D1A692B715D27CCB45798B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_AE628FAC35DB83F4843ED27CCB455515" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_F56945D924D1A692B715D27CCB45798B" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_AE628FAC35DB83F4843ED27CCB455515" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_358803C9B176E17A9BA7D27CCB46ED5A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_F56945D924D1A692B715D27CCB45798B" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_358803C9B176E17A9BA7D27CCB46ED5A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_8C9DBD55C59816E00AD1D27CCB465AE4" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_F56945D924D1A692B715D27CCB45798B" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_8C9DBD55C59816E00AD1D27CCB465AE4" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BusinessCombinationContingentConsiderationArrangementsContingentConsiderationBenefit" xlink:label="loc_mmsi_BusinessCombinationContingentConsiderationArrangementsContingentConsiderationBenefit_42E4B472999987331D5CD27CCB4666A5" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_F56945D924D1A692B715D27CCB45798B" xlink:to="loc_mmsi_BusinessCombinationContingentConsiderationArrangementsContingentConsiderationBenefit_42E4B472999987331D5CD27CCB4666A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff" xlink:label="loc_us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff_6CFB402917EA2F8D7942D27CCB46E42B" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_F56945D924D1A692B715D27CCB45798B" xlink:to="loc_us-gaap_ResearchAndDevelopmentAssetAcquiredOtherThanThroughBusinessCombinationWrittenOff_6CFB402917EA2F8D7942D27CCB46E42B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_FD5A31F66FB3FE4ED604D27CCB4B9BD3" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_F56945D924D1A692B715D27CCB45798B" xlink:to="loc_us-gaap_OperatingExpenses_FD5A31F66FB3FE4ED604D27CCB4B9BD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_371F56C55B9D54995A1FD27CCB4BB697" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:to="loc_us-gaap_OperatingIncomeLoss_371F56C55B9D54995A1FD27CCB4BB697" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_9A620575204D1C4F59AFD27CCB4B3205" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_9A620575204D1C4F59AFD27CCB4B3205" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_63C8263E6A02A20ADE61D27CCB4B3C0A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_9A620575204D1C4F59AFD27CCB4B3205" xlink:to="loc_us-gaap_InvestmentIncomeInterest_63C8263E6A02A20ADE61D27CCB4B3C0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_2F833A65A7A02EEBBA5CD27CCB4BF9BD" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_9A620575204D1C4F59AFD27CCB4B3205" xlink:to="loc_us-gaap_InterestExpense_2F833A65A7A02EEBBA5CD27CCB4BF9BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_E52AE6CC12C95720BA19D27CCB4C45CB" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_9A620575204D1C4F59AFD27CCB4B3205" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_E52AE6CC12C95720BA19D27CCB4C45CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_0310A2BD5837A3DF1EFBD27CCB4CC64E" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_9A620575204D1C4F59AFD27CCB4B3205" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_0310A2BD5837A3DF1EFBD27CCB4CC64E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_7FBFEED88954D983D194D27CCB4CD4CF" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_7FBFEED88954D983D194D27CCB4CD4CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_7CCC6C3E8E393BBAE293D27CCB4CF3AD" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_7CCC6C3E8E393BBAE293D27CCB4CF3AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_00C84E1D761D783112FDD27CCB4C3615" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:to="loc_us-gaap_NetIncomeLoss_00C84E1D761D783112FDD27CCB4C3615" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_7201857F7EBEDBA3B986D27CCB4C1577" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:to="loc_us-gaap_EarningsPerShareAbstract_7201857F7EBEDBA3B986D27CCB4C1577" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_F0F15082A135F560ECECD27CCB4CA3A7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_7201857F7EBEDBA3B986D27CCB4C1577" xlink:to="loc_us-gaap_EarningsPerShareBasic_F0F15082A135F560ECECD27CCB4CA3A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_D8AEB8A8B678B756C842D27CCB4CB307" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_7201857F7EBEDBA3B986D27CCB4C1577" xlink:to="loc_us-gaap_EarningsPerShareDiluted_D8AEB8A8B678B756C842D27CCB4CB307" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_6F6725FBF4AB8AE3C8CCD27CCB4C0E5B" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_A81B86ABF24EB0373C8BD27CCB45BE25" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_6F6725FBF4AB8AE3C8CCD27CCB4C0E5B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_3E87F20ECED1A72AD306D27CCB4C2B20" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_6F6725FBF4AB8AE3C8CCD27CCB4C0E5B" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_3E87F20ECED1A72AD306D27CCB4C2B20" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_86D9D25EE898403C4007D27CCB4C79A4" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_6F6725FBF4AB8AE3C8CCD27CCB4C0E5B" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_86D9D25EE898403C4007D27CCB4C79A4" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="loc_us-gaap_StatementOfStockholdersEquityAbstract_2077A27419A2FF1EDC568105CC4CE9C4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_A1678CD0FA31D349D2558105CC4C7F99" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfStockholdersEquityAbstract_2077A27419A2FF1EDC568105CC4CE9C4" xlink:to="loc_us-gaap_StatementTable_A1678CD0FA31D349D2558105CC4C7F99" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_6C69E1E9B514796812608105CC4D19D0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_A1678CD0FA31D349D2558105CC4C7F99" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_6C69E1E9B514796812608105CC4D19D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_907396A364A85677010B8105CC4DB474" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_6C69E1E9B514796812608105CC4D19D0" xlink:to="loc_us-gaap_EquityComponentDomain_907396A364A85677010B8105CC4DB474" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_052F7FC446F1B8BC3DE78105CC4D9295" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_907396A364A85677010B8105CC4DB474" xlink:to="loc_us-gaap_CommonStockMember_052F7FC446F1B8BC3DE78105CC4D9295" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_533649A4EE54D01407528105CC4EBD54" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_907396A364A85677010B8105CC4DB474" xlink:to="loc_us-gaap_RetainedEarningsMember_533649A4EE54D01407528105CC4EBD54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_B5386F77C1A6EA390FBC8105CC4EF0D9" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_907396A364A85677010B8105CC4DB474" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_B5386F77C1A6EA390FBC8105CC4EF0D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_E3BB742E49600E9C2E278105CC4E8AE7" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_A1678CD0FA31D349D2558105CC4C7F99" xlink:to="loc_us-gaap_StatementLineItems_E3BB742E49600E9C2E278105CC4E8AE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_E3BB742E49600E9C2E278105CC4E8AE7" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_2072101079235676511F8105CC4FE229" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_StockholdersEquity_2072101079235676511F8105CC4FE229" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_3267C4785A62F44F549F8105CC4FE23B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_3267C4785A62F44F549F8105CC4FE23B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_C713CC2F83E398A299F08105CC4F4DA7" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_NetIncomeLoss_C713CC2F83E398A299F08105CC4F4DA7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_DE89463BD0C2768BD5478105CC4FD226" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_DE89463BD0C2768BD5478105CC4FD226" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_6433A98C3EC6B412FCFD8105CC4F2E3E" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation_6433A98C3EC6B412FCFD8105CC4F2E3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_AB602422BFA86473B0F48105CC4F808F" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_AB602422BFA86473B0F48105CC4F808F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_E8AD31BD8A81860C13368105CC4F7499" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_E8AD31BD8A81860C13368105CC4F7499" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_6F404C7BEB5449EEF48B8105CC4FA631" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_6F404C7BEB5449EEF48B8105CC4FA631" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_CC43A0FED491969FB7378105CC5096A7" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_CC43A0FED491969FB7378105CC5096A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_4398B2C65B0AA52506E08105CC51C83A" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_4398B2C65B0AA52506E08105CC51C83A" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_StockSurrenderedDuringPeriodValuePayrollTaxLiabilitiesStockOptionsExercised" xlink:label="loc_mmsi_StockSurrenderedDuringPeriodValuePayrollTaxLiabilitiesStockOptionsExercised_4CA9D1E7147FF607047E8105CC51D8AE" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_mmsi_StockSurrenderedDuringPeriodValuePayrollTaxLiabilitiesStockOptionsExercised_4CA9D1E7147FF607047E8105CC51D8AE" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_StockSurrenderedDuringPeriodSharesPayrollTaxLiabilitiesStockOptionsExercised" xlink:label="loc_mmsi_StockSurrenderedDuringPeriodSharesPayrollTaxLiabilitiesStockOptionsExercised_E213597B4F2A91692C0B8105CC511F8C" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_mmsi_StockSurrenderedDuringPeriodSharesPayrollTaxLiabilitiesStockOptionsExercised_E213597B4F2A91692C0B8105CC511F8C" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_StockSurrenderedDuringPeriodValueStockOptionsExercised" xlink:label="loc_mmsi_StockSurrenderedDuringPeriodValueStockOptionsExercised_645DFE38B28F9FBC49278105CC51D764" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_mmsi_StockSurrenderedDuringPeriodValueStockOptionsExercised_645DFE38B28F9FBC49278105CC51D764" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_StockSurrenderedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_mmsi_StockSurrenderedDuringPeriodSharesStockOptionsExercised_5BCC5103FD1A87E6BBB28105CC51AFF3" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_mmsi_StockSurrenderedDuringPeriodSharesStockOptionsExercised_5BCC5103FD1A87E6BBB28105CC51AFF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_0CACE58E329BDCFA37AA8105CC5139EA" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_StockholdersEquity_0CACE58E329BDCFA37AA8105CC5139EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_2D44DBAE5A4DC5F45BA88105CC515E49" xlink:type="locator" />
    <link:presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_368F254B76A70436321E8105CC4EF587" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_2D44DBAE5A4DC5F45BA88105CC515E49" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/Derivatives" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_B8276EAA5961C7E24BABD27CCB9B7184" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_BD1991174DD82953B95BD27CCB9BE0DF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_B8276EAA5961C7E24BABD27CCB9B7184" xlink:to="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_BD1991174DD82953B95BD27CCB9BE0DF" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/DerivativesAmountOfGainLossRecognizedInOciAndIncomeStatementDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_7B50665CEEA66FE3A8F880C0276387DF" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_6C6AC7B7B9AC613B844480C027639174" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_7B50665CEEA66FE3A8F880C0276387DF" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_6C6AC7B7B9AC613B844480C027639174" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_7ED67DB5F6CA375BD29680C027639950" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_6C6AC7B7B9AC613B844480C027639174" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_7ED67DB5F6CA375BD29680C027639950" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingRelationshipDomain" xlink:label="loc_us-gaap_HedgingRelationshipDomain_C0C923D872CA63AA030180C02763C86E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_7ED67DB5F6CA375BD29680C027639950" xlink:to="loc_us-gaap_HedgingRelationshipDomain_C0C923D872CA63AA030180C02763C86E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashFlowHedgingMember" xlink:label="loc_us-gaap_CashFlowHedgingMember_71622591A0D214678B8780C02763C3C6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingRelationshipDomain_C0C923D872CA63AA030180C02763C86E" xlink:to="loc_us-gaap_CashFlowHedgingMember_71622591A0D214678B8780C02763C3C6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_F4CF2A24F21D20CD3E3F80C02763CC0F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_6C6AC7B7B9AC613B844480C027639174" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_F4CF2A24F21D20CD3E3F80C02763CC0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_75E92B62CAB3B2A2A96980C0276340A5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_F4CF2A24F21D20CD3E3F80C02763CC0F" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_75E92B62CAB3B2A2A96980C0276340A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestRateSwapMember" xlink:label="loc_us-gaap_InterestRateSwapMember_50764B2D44CD7E5DFFFE80C02763BEB6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_75E92B62CAB3B2A2A96980C0276340A5" xlink:to="loc_us-gaap_InterestRateSwapMember_50764B2D44CD7E5DFFFE80C02763BEB6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_B980FAFB1C0448F9042880D78E4BD913" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_75E92B62CAB3B2A2A96980C0276340A5" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_B980FAFB1C0448F9042880D78E4BD913" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_91258FE05BD2BEC9823580C027633820" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_6C6AC7B7B9AC613B844480C027639174" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_91258FE05BD2BEC9823580C027633820" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_13947F7617EABEEFB1A280C027630D1C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_91258FE05BD2BEC9823580C027633820" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_13947F7617EABEEFB1A280C027630D1C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestExpenseMember" xlink:label="loc_us-gaap_InterestExpenseMember_1DEA7423A1AEEFC5885E80C02763D0BB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_13947F7617EABEEFB1A280C027630D1C" xlink:to="loc_us-gaap_InterestExpenseMember_1DEA7423A1AEEFC5885E80C02763D0BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueNetMember" xlink:label="loc_us-gaap_SalesRevenueNetMember_53B72EC13E6CAA59E26780C027641358" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_13947F7617EABEEFB1A280C027630D1C" xlink:to="loc_us-gaap_SalesRevenueNetMember_53B72EC13E6CAA59E26780C027641358" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostOfGoodsTotalMember" xlink:label="loc_us-gaap_CostOfGoodsTotalMember_E1052B56499443C3AA5B80C027643E99" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_13947F7617EABEEFB1A280C027630D1C" xlink:to="loc_us-gaap_CostOfGoodsTotalMember_E1052B56499443C3AA5B80C027643E99" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_A1E05570A6C429251FBA80C027640378" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_6C6AC7B7B9AC613B844480C027639174" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_A1E05570A6C429251FBA80C027640378" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet_7F7E8068334E8598522F80C027644005" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_A1E05570A6C429251FBA80C027640378" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet_7F7E8068334E8598522F80C027644005" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet_0D6C60E75B292F5EB0BA80C02764BBAA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_A1E05570A6C429251FBA80C027640378" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet_0D6C60E75B292F5EB0BA80C02764BBAA" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/DerivativesFairValueOfDerivativeInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_00FED85C4904115EDB8F80C02768816D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_12982DE4A4331955FAA880C02768B3EF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_00FED85C4904115EDB8F80C02768816D" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_12982DE4A4331955FAA880C02768B3EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_4493D11A9D8103D8889880C02769B80E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_12982DE4A4331955FAA880C02768B3EF" xlink:to="loc_us-gaap_HedgingDesignationAxis_4493D11A9D8103D8889880C02769B80E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_0BEBA7F2EEE602F07EB680C02769D037" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationAxis_4493D11A9D8103D8889880C02769B80E" xlink:to="loc_us-gaap_HedgingDesignationDomain_0BEBA7F2EEE602F07EB680C02769D037" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_CE6AF2C78702D92325AA80C02769E467" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationDomain_0BEBA7F2EEE602F07EB680C02769D037" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_CE6AF2C78702D92325AA80C02769E467" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_5027E4BE52EFC11100AD80C02769AE40" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationDomain_0BEBA7F2EEE602F07EB680C02769D037" xlink:to="loc_us-gaap_NondesignatedMember_5027E4BE52EFC11100AD80C02769AE40" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_B39B3A39F2AAE3FF953880C02769A1DD" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_12982DE4A4331955FAA880C02768B3EF" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_B39B3A39F2AAE3FF953880C02769A1DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_E7B95E9352422FDC0E6280C02769BE58" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_B39B3A39F2AAE3FF953880C02769A1DD" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_E7B95E9352422FDC0E6280C02769BE58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestRateSwapMember" xlink:label="loc_us-gaap_InterestRateSwapMember_BD49615322571579978E80C02769A268" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_E7B95E9352422FDC0E6280C02769BE58" xlink:to="loc_us-gaap_InterestRateSwapMember_BD49615322571579978E80C02769A268" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_1AB2552297EB54CB467A80D388520EFE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_E7B95E9352422FDC0E6280C02769BE58" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_1AB2552297EB54CB467A80D388520EFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_90805EE0B5C05C99482380C0276901F3" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_12982DE4A4331955FAA880C02768B3EF" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_90805EE0B5C05C99482380C0276901F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_383A297A17EBAC97454780C02769F426" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_90805EE0B5C05C99482380C0276901F3" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_383A297A17EBAC97454780C02769F426" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherNoncurrentAssetsMember" xlink:label="loc_us-gaap_OtherNoncurrentAssetsMember_DBAC404C4BAFCDFA609B80C027693195" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_383A297A17EBAC97454780C02769F426" xlink:to="loc_us-gaap_OtherNoncurrentAssetsMember_DBAC404C4BAFCDFA609B80C027693195" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember" xlink:label="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_508B7391BE7DAA1728E280C02769E6BF" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_383A297A17EBAC97454780C02769F426" xlink:to="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_508B7391BE7DAA1728E280C02769E6BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedLiabilitiesMember" xlink:label="loc_us-gaap_AccruedLiabilitiesMember_C68DBC366D0EA7E5BC5E80C0276A513B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_383A297A17EBAC97454780C02769F426" xlink:to="loc_us-gaap_AccruedLiabilitiesMember_C68DBC366D0EA7E5BC5E80C0276A513B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherNoncurrentLiabilitiesMember" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_BA1E8940226C090ABE6D80D5A96B99E4" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_383A297A17EBAC97454780C02769F426" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_BA1E8940226C090ABE6D80D5A96B99E4" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_OtherReceivablesMember" xlink:label="loc_mmsi_OtherReceivablesMember_7EE9A0C84C41204EA04980C0276A4E43" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_383A297A17EBAC97454780C02769F426" xlink:to="loc_mmsi_OtherReceivablesMember_7EE9A0C84C41204EA04980C0276A4E43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_DC217AE30D3FF3765EA580C0276A4774" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_12982DE4A4331955FAA880C02768B3EF" xlink:to="loc_us-gaap_DerivativesFairValueLineItems_DC217AE30D3FF3765EA580C0276A4774" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_FC022A29A8C9F9DBB8C880C0276A1EBC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_DC217AE30D3FF3765EA580C0276A4774" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_FC022A29A8C9F9DBB8C880C0276A1EBC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_9A21EBE0071B730CBFA480C0276AD385" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_DC217AE30D3FF3765EA580C0276A4774" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_9A21EBE0071B730CBFA480C0276AD385" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/DerivativesForwardNotionalContractsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_8A00B0EFC1FE080775D980C0276DE66C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeTable" xlink:label="loc_us-gaap_DerivativeTable_F4843567F3AEA45A5C1E80C0276D18B8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_8A00B0EFC1FE080775D980C0276DE66C" xlink:to="loc_us-gaap_DerivativeTable_F4843567F3AEA45A5C1E80C0276D18B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_AFE4476727DFC6B9E6D680E0EF73E7C9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_F4843567F3AEA45A5C1E80C0276D18B8" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_AFE4476727DFC6B9E6D680E0EF73E7C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingRelationshipDomain" xlink:label="loc_us-gaap_HedgingRelationshipDomain_DE98D67A90F5ACE3069D80E0EF8E3071" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_AFE4476727DFC6B9E6D680E0EF73E7C9" xlink:to="loc_us-gaap_HedgingRelationshipDomain_DE98D67A90F5ACE3069D80E0EF8E3071" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashFlowHedgingMember" xlink:label="loc_us-gaap_CashFlowHedgingMember_01C19813CC34693CDE6880C0276D4169" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingRelationshipDomain_DE98D67A90F5ACE3069D80E0EF8E3071" xlink:to="loc_us-gaap_CashFlowHedgingMember_01C19813CC34693CDE6880C0276D4169" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_67A0D23B85437E39EAA580DE01574157" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_F4843567F3AEA45A5C1E80C0276D18B8" xlink:to="loc_us-gaap_HedgingDesignationAxis_67A0D23B85437E39EAA580DE01574157" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_48DD08C5841B900EB7FA80DE0158F57F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationAxis_67A0D23B85437E39EAA580DE01574157" xlink:to="loc_us-gaap_HedgingDesignationDomain_48DD08C5841B900EB7FA80DE0158F57F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_2BC4BBCAA5DF53A3E74380E057170F12" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationDomain_48DD08C5841B900EB7FA80DE0158F57F" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_2BC4BBCAA5DF53A3E74380E057170F12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_8EC6B4E380173DD24E0280DE5611B461" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationDomain_48DD08C5841B900EB7FA80DE0158F57F" xlink:to="loc_us-gaap_NondesignatedMember_8EC6B4E380173DD24E0280DE5611B461" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_079D5D575AE7705B96D180C0276D523B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_F4843567F3AEA45A5C1E80C0276D18B8" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_079D5D575AE7705B96D180C0276D523B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_4E9DB118EF7BC50EC5FC80C0276DC3AF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_079D5D575AE7705B96D180C0276D523B" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_4E9DB118EF7BC50EC5FC80C0276DC3AF" xlink:type="arc" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_4E9DB118EF7BC50EC5FC80C0276DC3AF" xlink:to="loc_us-gaap_CashFlowHedgingMember_01C19813CC34693CDE6880C0276D4169" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_423D75F23EB0E8467A7580DF3336B4B1" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_4E9DB118EF7BC50EC5FC80C0276DC3AF" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_423D75F23EB0E8467A7580DF3336B4B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="loc_us-gaap_DerivativeLineItems_DBF93870AD44E7599A3980C0276E8F3D" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_F4843567F3AEA45A5C1E80C0276D18B8" xlink:to="loc_us-gaap_DerivativeLineItems_DBF93870AD44E7599A3980C0276E8F3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_0C4CF2549FD04F9EA4BD80C0276E1351" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_DBF93870AD44E7599A3980C0276E8F3D" xlink:to="loc_invest_DerivativeNotionalAmount_0C4CF2549FD04F9EA4BD80C0276E1351" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/DerivativesGainLossInConsolidatedStatementsOfIncomeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_2306C742B279AB3B090680C0275EB2BE" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeTable" xlink:label="loc_us-gaap_DerivativeTable_52DEC9D5BB912F5829D780C0275EF1CF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_2306C742B279AB3B090680C0275EB2BE" xlink:to="loc_us-gaap_DerivativeTable_52DEC9D5BB912F5829D780C0275EF1CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_1F229CFBF0A6B644768D80C0275ED85F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_52DEC9D5BB912F5829D780C0275EF1CF" xlink:to="loc_us-gaap_HedgingDesignationAxis_1F229CFBF0A6B644768D80C0275ED85F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_F613930F7C83516CB83B80C0275E8293" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationAxis_1F229CFBF0A6B644768D80C0275ED85F" xlink:to="loc_us-gaap_HedgingDesignationDomain_F613930F7C83516CB83B80C0275E8293" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_BFA97B94C7E4B916DE1C80C0275EFEE1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationDomain_F613930F7C83516CB83B80C0275E8293" xlink:to="loc_us-gaap_NondesignatedMember_BFA97B94C7E4B916DE1C80C0275EFEE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_5ADEA87695D3C6EA97B980C0275E6613" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_52DEC9D5BB912F5829D780C0275EF1CF" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_5ADEA87695D3C6EA97B980C0275E6613" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_73B3E2855D69DB91C81B80C0275E2422" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_5ADEA87695D3C6EA97B980C0275E6613" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_73B3E2855D69DB91C81B80C0275E2422" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_4EEE4A109394E946141080D97C276A6A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_73B3E2855D69DB91C81B80C0275E2422" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_4EEE4A109394E946141080D97C276A6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_3FC49E4E8049CBE3E95480C0275E23AE" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_52DEC9D5BB912F5829D780C0275EF1CF" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_3FC49E4E8049CBE3E95480C0275E23AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_6BF8A21ED972F070311D80C0275F0536" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_3FC49E4E8049CBE3E95480C0275E23AE" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_6BF8A21ED972F070311D80C0275F0536" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherExpenseMember" xlink:label="loc_us-gaap_OtherExpenseMember_78024DB29EDAC124187D80C0275F6013" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_6BF8A21ED972F070311D80C0275F0536" xlink:to="loc_us-gaap_OtherExpenseMember_78024DB29EDAC124187D80C0275F6013" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="loc_us-gaap_DerivativeLineItems_263E62EFA8682DBE1D1B80C0275F5914" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_52DEC9D5BB912F5829D780C0275EF1CF" xlink:to="loc_us-gaap_DerivativeLineItems_263E62EFA8682DBE1D1B80C0275F5914" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_7852D0E039C57E9866DB80C0275FC70E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_263E62EFA8682DBE1D1B80C0275F5914" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_7852D0E039C57E9866DB80C0275FC70E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/DerivativesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_03242F0B3D0EA8DA3ACF8173C80F6533" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeTable" xlink:label="loc_us-gaap_DerivativeTable_F23B798A41A701A990778173C80F1DCA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_03242F0B3D0EA8DA3ACF8173C80F6533" xlink:to="loc_us-gaap_DerivativeTable_F23B798A41A701A990778173C80F1DCA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_3F2F841BAC0FD808FCD68173C810956B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_F23B798A41A701A990778173C80F1DCA" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_3F2F841BAC0FD808FCD68173C810956B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_F840DE9DEB001B0B39618173C810226F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_3F2F841BAC0FD808FCD68173C810956B" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_F840DE9DEB001B0B39618173C810226F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SwapMember" xlink:label="loc_us-gaap_SwapMember_BCD875AF55EAD6C3657A8173C8106FC4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_F840DE9DEB001B0B39618173C810226F" xlink:to="loc_us-gaap_SwapMember_BCD875AF55EAD6C3657A8173C8106FC4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_6449E35DFA9395D0CC118173C81175EC" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_F23B798A41A701A990778173C80F1DCA" xlink:to="loc_us-gaap_RangeAxis_6449E35DFA9395D0CC118173C81175EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_D3B540C349D19F45AFB08173C8113EC8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_6449E35DFA9395D0CC118173C81175EC" xlink:to="loc_us-gaap_RangeMember_D3B540C349D19F45AFB08173C8113EC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_DA995ABE0158F54C7AF88173C811AAD1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_D3B540C349D19F45AFB08173C8113EC8" xlink:to="loc_us-gaap_MaximumMember_DA995ABE0158F54C7AF88173C811AAD1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_588F2D018162D9313E758173C811EC2F" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_F23B798A41A701A990778173C80F1DCA" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_588F2D018162D9313E758173C811EC2F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_A0743CC53F644B8769318173C811E99D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_588F2D018162D9313E758173C811EC2F" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_A0743CC53F644B8769318173C811E99D" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RevenueandCostofSalesMember" xlink:label="loc_mmsi_RevenueandCostofSalesMember_E580D329F826983DA8598173C812F630" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_A0743CC53F644B8769318173C811E99D" xlink:to="loc_mmsi_RevenueandCostofSalesMember_E580D329F826983DA8598173C812F630" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestExpenseMember" xlink:label="loc_us-gaap_InterestExpenseMember_EBCA719B3349E9C406568173C812E145" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_A0743CC53F644B8769318173C811E99D" xlink:to="loc_us-gaap_InterestExpenseMember_EBCA719B3349E9C406568173C812E145" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeLineItems" xlink:label="loc_us-gaap_DerivativeLineItems_9EEADD2C46C3490ED8808173C812E7F1" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeTable_F23B798A41A701A990778173C80F1DCA" xlink:to="loc_us-gaap_DerivativeLineItems_9EEADD2C46C3490ED8808173C812E7F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_CB1547DB5969CED9ABC68173C8123FB4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_9EEADD2C46C3490ED8808173C812E7F1" xlink:to="loc_invest_DerivativeNotionalAmount_CB1547DB5969CED9ABC68173C8123FB4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeFixedInterestRate" xlink:label="loc_us-gaap_DerivativeFixedInterestRate_AAF7A073933300A84CDA8173C81224FE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_9EEADD2C46C3490ED8808173C812E7F1" xlink:to="loc_us-gaap_DerivativeFixedInterestRate_AAF7A073933300A84CDA8173C81224FE" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DerivativeQuarterlyReductionofNotionalAmount" xlink:label="loc_mmsi_DerivativeQuarterlyReductionofNotionalAmount_F345ECEA3B0F1F2A64158173C81261CF" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_9EEADD2C46C3490ED8808173C812E7F1" xlink:to="loc_mmsi_DerivativeQuarterlyReductionofNotionalAmount_F345ECEA3B0F1F2A64158173C81261CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_4C22063D6037BC56052D8173C81276D5" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_9EEADD2C46C3490ED8808173C812E7F1" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_4C22063D6037BC56052D8173C81276D5" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax" xlink:label="loc_mmsi_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax_8F0C87CF9722EC7C0B478173C812FBB3" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_9EEADD2C46C3490ED8808173C812E7F1" xlink:to="loc_mmsi_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax_8F0C87CF9722EC7C0B478173C812FBB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestRateCashFlowHedgeAssetAtFairValue" xlink:label="loc_us-gaap_InterestRateCashFlowHedgeAssetAtFairValue_B05DC354E16914BD94D38173C8135B2A" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_9EEADD2C46C3490ED8808173C812E7F1" xlink:to="loc_us-gaap_InterestRateCashFlowHedgeAssetAtFairValue_B05DC354E16914BD94D38173C8135B2A" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonthsGross" xlink:label="loc_mmsi_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonthsGross_0FC0419B04908CA9E6888173C81343D2" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_9EEADD2C46C3490ED8808173C812E7F1" xlink:to="loc_mmsi_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonthsGross_0FC0419B04908CA9E6888173C81343D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths" xlink:label="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_9627D56849125AEC958E8173C8138A3A" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeLineItems_9EEADD2C46C3490ED8808173C812E7F1" xlink:to="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_9627D56849125AEC958E8173C8138A3A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/DerivativesPolicies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_BF0F29DE3CAC99F706CE49B0960D5BD3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativesPolicyTextBlock" xlink:label="loc_us-gaap_DerivativesPolicyTextBlock_CD5F6A2B72C5746B489349B0F58040CB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_BF0F29DE3CAC99F706CE49B0960D5BD3" xlink:to="loc_us-gaap_DerivativesPolicyTextBlock_CD5F6A2B72C5746B489349B0F58040CB" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/DerivativesTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_B8E0D2077CC71426803C4948561CAD91" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock_3D90D86F219BB46A4B354948561CFE40" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_B8E0D2077CC71426803C4948561CAD91" xlink:to="loc_us-gaap_ScheduleOfNotionalAmountsOfOutstandingDerivativePositionsTableTextBlock_3D90D86F219BB46A4B354948561CFE40" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_2A461E152D87D9CD2DED4948561D8A09" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_B8E0D2077CC71426803C4948561CAD91" xlink:to="loc_us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_2A461E152D87D9CD2DED4948561D8A09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfCashFlowHedgesIncludedInAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfCashFlowHedgesIncludedInAccumulatedOtherComprehensiveIncomeLossTableTextBlock_D94A908063655B706FAD4948561D712F" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_B8E0D2077CC71426803C4948561CAD91" xlink:to="loc_us-gaap_ScheduleOfCashFlowHedgesIncludedInAccumulatedOtherComprehensiveIncomeLossTableTextBlock_D94A908063655B706FAD4948561D712F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_92775C46C8B7F98E0F574948561D6D27" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_B8E0D2077CC71426803C4948561CAD91" xlink:to="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_92775C46C8B7F98E0F574948561D6D27" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DocumentInformationAbstract" xlink:label="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_D070B6EA08B9D1BDF624D27CCBF3C4BD" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_EntityRegistrantName_D070B6EA08B9D1BDF624D27CCBF3C4BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_1A3C48FF084B0D530C07D27CCBF38F51" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_EntityCentralIndexKey_1A3C48FF084B0D530C07D27CCBF38F51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_B8419DC3858A5B31D371D27CCBF4512B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_CurrentFiscalYearEndDate_B8419DC3858A5B31D371D27CCBF4512B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_41FB51FC258615CDEF0AD27CCBF441F6" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_EntityFilerCategory_41FB51FC258615CDEF0AD27CCBF441F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_5CF62C110E19F302D03CD27CCBF43021" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_DocumentType_5CF62C110E19F302D03CD27CCBF43021" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_BFEF4B8A86C8210A137CD27CCBF4E9BC" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_DocumentPeriodEndDate_BFEF4B8A86C8210A137CD27CCBF4E9BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_63F5F10D99363968512BD27CCBF419D6" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_DocumentFiscalYearFocus_63F5F10D99363968512BD27CCBF419D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_5651E0E59CCB317E8801D27CCBF4D993" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_DocumentFiscalPeriodFocus_5651E0E59CCB317E8801D27CCBF4D993" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_A80319670FBA9B7A5D19D27CCBF43E82" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_AmendmentFlag_A80319670FBA9B7A5D19D27CCBF43E82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_03DC940D4B158FCC0B5DD27CCBF43AD3" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_03DC940D4B158FCC0B5DD27CCBF43AD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_FFC2626596F52B608AE0D27CCBF4C746" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_FFC2626596F52B608AE0D27CCBF4C746" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityVoluntaryFilers" xlink:label="loc_dei_EntityVoluntaryFilers_ECFA2CB732DC5D67233BD27CCBF5B3A3" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_EntityVoluntaryFilers_ECFA2CB732DC5D67233BD27CCBF5B3A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="loc_dei_EntityCurrentReportingStatus_F613272A3A9E5DBA45C1D27CCBF5903E" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_EntityCurrentReportingStatus_F613272A3A9E5DBA45C1D27CCBF5903E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityPublicFloat" xlink:label="loc_dei_EntityPublicFloat_7973662A8A10821809B7D27CCBF53D54" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DocumentInformationAbstract_70553AC2AF854400F180D27CCBF360F7" xlink:to="loc_dei_EntityPublicFloat_7973662A8A10821809B7D27CCBF53D54" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EarningsPerCommonShareEps" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:label="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_B15B4AACE2DD5F6B87F1D27CCA913010" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="loc_us-gaap_EarningsPerShareTextBlock_37A82F8F160F2B9A1059D27CCA911D4F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_B15B4AACE2DD5F6B87F1D27CCA913010" xlink:to="loc_us-gaap_EarningsPerShareTextBlock_37A82F8F160F2B9A1059D27CCA911D4F" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EarningsPerCommonShareEpsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:label="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_E005533B74D60ECA6565D27CC9F2A248" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_657567AE44DAE0632923D27CC9F30983" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_E005533B74D60ECA6565D27CC9F2A248" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_657567AE44DAE0632923D27CC9F30983" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_DF7EC85A84001EECCBF7D27CC9F346DA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_E005533B74D60ECA6565D27CC9F2A248" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_DF7EC85A84001EECCBF7D27CC9F346DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_E4A8F2E5FFD40D411B98D27CC9F302EC" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_E005533B74D60ECA6565D27CC9F2A248" xlink:to="loc_us-gaap_EarningsPerShareBasic_E4A8F2E5FFD40D411B98D27CC9F302EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_1CD828C7699774D85A22D27CC9F320AA" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_E005533B74D60ECA6565D27CC9F2A248" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_1CD828C7699774D85A22D27CC9F320AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_C71E5B990748E1EBA81ED27CC9F3BF4C" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_E005533B74D60ECA6565D27CC9F2A248" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_C71E5B990748E1EBA81ED27CC9F3BF4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_AD21F7DF9A11131D25A6D27CC9F3BBCD" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_E005533B74D60ECA6565D27CC9F2A248" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_AD21F7DF9A11131D25A6D27CC9F3BBCD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_CD6D8F2022968893C7A1D27CC9F39CD9" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_E005533B74D60ECA6565D27CC9F2A248" xlink:to="loc_us-gaap_EarningsPerShareDiluted_CD6D8F2022968893C7A1D27CC9F39CD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_98E92BC83B68103F5031D27CC9F3A51D" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_E005533B74D60ECA6565D27CC9F2A248" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_98E92BC83B68103F5031D27CC9F3A51D" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EarningsPerCommonShareEpsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:label="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_71AD43F668DBB66D69D4D27CCB1DCEC5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_E900B7110384F6CEF324D27CCB1D9C4E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareBasicAndDilutedAbstract_71AD43F668DBB66D69D4D27CCB1DCEC5" xlink:to="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_E900B7110384F6CEF324D27CCB1D9C4E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EmployeeBenefitPlans" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract" xlink:label="loc_us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract_04AF6F2695EC5A31C290D27CCAC5ED94" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CompensationAndEmployeeBenefitPlansTextBlock" xlink:label="loc_us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_87E894F2A08136C09FE1D27CCAC5E769" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract_04AF6F2695EC5A31C290D27CCAC5ED94" xlink:to="loc_us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_87E894F2A08136C09FE1D27CCAC5E769" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EmployeeBenefitPlansDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract" xlink:label="loc_us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract_DE455E2AB04852026C81D27CC8C94F77" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPlanTable" xlink:label="loc_us-gaap_DefinedContributionPlanTable_E45FA9174E390EF31915D27CC8C9413E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DefinedContributionPensionAndOtherPostretirementPlansDisclosureAbstract_DE455E2AB04852026C81D27CC8C94F77" xlink:to="loc_us-gaap_DefinedContributionPlanTable_E45FA9174E390EF31915D27CC8C9413E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TitleOfIndividualAxis" xlink:label="loc_us-gaap_TitleOfIndividualAxis_4C6D639FD67F499EAA5ED27CC8C9E813" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DefinedContributionPlanTable_E45FA9174E390EF31915D27CC8C9413E" xlink:to="loc_us-gaap_TitleOfIndividualAxis_4C6D639FD67F499EAA5ED27CC8C9E813" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_D51E2383A12A9A3FE185D27CC8C94922" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TitleOfIndividualAxis_4C6D639FD67F499EAA5ED27CC8C9E813" xlink:to="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_D51E2383A12A9A3FE185D27CC8C94922" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ManagementMember" xlink:label="loc_us-gaap_ManagementMember_3FDE09683E2213998B6ED27CC8C98764" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_D51E2383A12A9A3FE185D27CC8C94922" xlink:to="loc_us-gaap_ManagementMember_3FDE09683E2213998B6ED27CC8C98764" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_76FC81946DB06068BE2AD27CC8C99505" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DefinedContributionPlanTable_E45FA9174E390EF31915D27CC8C9413E" xlink:to="loc_us-gaap_RangeAxis_76FC81946DB06068BE2AD27CC8C99505" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_4C7EA4E6FF7796D59D0FD27CC8C9A418" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_76FC81946DB06068BE2AD27CC8C99505" xlink:to="loc_us-gaap_RangeMember_4C7EA4E6FF7796D59D0FD27CC8C9A418" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_B5473606B64BFD369B88D27CC8C95EC9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_4C7EA4E6FF7796D59D0FD27CC8C9A418" xlink:to="loc_us-gaap_MinimumMember_B5473606B64BFD369B88D27CC8C95EC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_A51414C3125FC88C780BD27CC8C9EE02" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_4C7EA4E6FF7796D59D0FD27CC8C9A418" xlink:to="loc_us-gaap_MaximumMember_A51414C3125FC88C780BD27CC8C9EE02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_F8E8AD24ABED8242A7D0D27CC8C946E2" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DefinedContributionPlanTable_E45FA9174E390EF31915D27CC8C9413E" xlink:to="loc_us-gaap_StatementGeographicalAxis_F8E8AD24ABED8242A7D0D27CC8C946E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_B0C5AEF95EFF812F7F7FD27CC8CE0E4C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementGeographicalAxis_F8E8AD24ABED8242A7D0D27CC8C946E2" xlink:to="loc_us-gaap_SegmentGeographicalDomain_B0C5AEF95EFF812F7F7FD27CC8CE0E4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NonUsMember" xlink:label="loc_us-gaap_NonUsMember_4B9655E85EFC30060ACAD27CC8CEC0D9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_B0C5AEF95EFF812F7F7FD27CC8CE0E4C" xlink:to="loc_us-gaap_NonUsMember_4B9655E85EFC30060ACAD27CC8CEC0D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_3E54D8BEE9C626DFD3C3D27CC8CF1380" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DefinedContributionPlanTable_E45FA9174E390EF31915D27CC8C9413E" xlink:to="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_3E54D8BEE9C626DFD3C3D27CC8CF1380" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DefinedContributionPlanMinimumAgeRequirement" xlink:label="loc_mmsi_DefinedContributionPlanMinimumAgeRequirement_415484EBEB9AE6FC1094D27CC8CF9444" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_3E54D8BEE9C626DFD3C3D27CC8CF1380" xlink:to="loc_mmsi_DefinedContributionPlanMinimumAgeRequirement_415484EBEB9AE6FC1094D27CC8CF9444" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DefinedContributionPlanMinimumServiceRequirement" xlink:label="loc_mmsi_DefinedContributionPlanMinimumServiceRequirement_89953CBC95AB85555266D27CC8CF3A37" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_3E54D8BEE9C626DFD3C3D27CC8CF1380" xlink:to="loc_mmsi_DefinedContributionPlanMinimumServiceRequirement_89953CBC95AB85555266D27CC8CF3A37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_D7B6F148C7BFFEAAF515D27CC8CF7082" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_3E54D8BEE9C626DFD3C3D27CC8CF1380" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_D7B6F148C7BFFEAAF515D27CC8CF7082" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_1BDB279F18F23F6C2743D27CC8CF7D84" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DefinedContributionPlanDisclosureLineItems_3E54D8BEE9C626DFD3C3D27CC8CF1380" xlink:to="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_1BDB279F18F23F6C2743D27CC8CF7D84" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrants" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_52589BA77E85B8059C2FD27CCA345E7E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_833F3803BF3A4DC456FCD27CCA34A65C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_52589BA77E85B8059C2FD27CCA345E7E" xlink:to="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_833F3803BF3A4DC456FCD27CCA34A65C" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsAllocationOfRecognizedPeriodCostsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_39AC829646C0EF3FD7C947FDC8DE5DC5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_45C7FDD70BDECC37B84A47FDC8DE4BDF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_39AC829646C0EF3FD7C947FDC8DE5DC5" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_45C7FDD70BDECC37B84A47FDC8DE4BDF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_53194CA432A0A62E40C347FDC8DF9D07" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_45C7FDD70BDECC37B84A47FDC8DE4BDF" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_53194CA432A0A62E40C347FDC8DF9D07" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_271B70753759ACA7B99A47FDC8DFC162" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_53194CA432A0A62E40C347FDC8DF9D07" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_271B70753759ACA7B99A47FDC8DFC162" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_D50FD625237E0C410A6747FDC8DFF34B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_271B70753759ACA7B99A47FDC8DFC162" xlink:to="loc_us-gaap_CostOfSalesMember_D50FD625237E0C410A6747FDC8DFF34B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_77B6C64CAB6443FA388947FDC8DF3501" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_271B70753759ACA7B99A47FDC8DFC162" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_77B6C64CAB6443FA388947FDC8DF3501" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_432C2159A337B1F93E7D47FDC8DFD67A" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_271B70753759ACA7B99A47FDC8DFC162" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_432C2159A337B1F93E7D47FDC8DFD67A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_FBDAA13A168562B77FD647FDC8DF0081" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_45C7FDD70BDECC37B84A47FDC8DE4BDF" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_FBDAA13A168562B77FD647FDC8DF0081" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_B7F1C9A418837C437CC547FDC8DF618B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_FBDAA13A168562B77FD647FDC8DF0081" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_B7F1C9A418837C437CC547FDC8DF618B" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsFairValueCalculationAssumptionsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_BD25AB6F491AFA1ECA09D27CCBAB5B8C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_E04C8491CA737B75F200D27CCBAB1579" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_BD25AB6F491AFA1ECA09D27CCBAB5B8C" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_E04C8491CA737B75F200D27CCBAB1579" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_2F09A0819CFA25ED4F77D27CCBABA2F8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_E04C8491CA737B75F200D27CCBAB1579" xlink:to="loc_us-gaap_RangeAxis_2F09A0819CFA25ED4F77D27CCBABA2F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_F1EFD9F9663708027B64D27CCBAB1F2B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_2F09A0819CFA25ED4F77D27CCBABA2F8" xlink:to="loc_us-gaap_RangeMember_F1EFD9F9663708027B64D27CCBAB1F2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_6F90DC74FF7B401B7721D27CCBAB3EB5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_F1EFD9F9663708027B64D27CCBAB1F2B" xlink:to="loc_us-gaap_MinimumMember_6F90DC74FF7B401B7721D27CCBAB3EB5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_9F5A18793E660197300ED27CCBAB415D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_F1EFD9F9663708027B64D27CCBAB1F2B" xlink:to="loc_us-gaap_MaximumMember_9F5A18793E660197300ED27CCBAB415D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_94CE2E4BCD1C445B25B5D27CCBABA550" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_E04C8491CA737B75F200D27CCBAB1579" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_94CE2E4BCD1C445B25B5D27CCBABA550" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_169511FD6C1AFE47476DD27CCBABC094" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_94CE2E4BCD1C445B25B5D27CCBABA550" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMinimum_169511FD6C1AFE47476DD27CCBABC094" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_AA323B20BA6617852875D27CCBAB8CF6" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_94CE2E4BCD1C445B25B5D27CCBABA550" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateMaximum_AA323B20BA6617852875D27CCBAB8CF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_F8E38A9069972612AA1CD27CCBABD555" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_94CE2E4BCD1C445B25B5D27CCBABA550" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_F8E38A9069972612AA1CD27CCBABD555" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_6B899ED342FFEF3CCABED27CCBACC17A" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_94CE2E4BCD1C445B25B5D27CCBABA550" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_6B899ED342FFEF3CCABED27CCBACC17A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_95F2EF7A8105BD2EA464D27CCBAC0721" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_94CE2E4BCD1C445B25B5D27CCBABA550" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum_95F2EF7A8105BD2EA464D27CCBAC0721" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_D01BDAFCDAE95F173801D27CCBAC58D4" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_94CE2E4BCD1C445B25B5D27CCBABA550" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMaximum_D01BDAFCDAE95F173801D27CCBAC58D4" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CF43FF87D76C1EA16535D27CC8F83966" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D54907681C030CB26A4CD27CC8F99D53" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CF43FF87D76C1EA16535D27CC8F83966" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D54907681C030CB26A4CD27CC8F99D53" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_CBEC63B6569A568509D4D27CC8F94FEF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D54907681C030CB26A4CD27CC8F99D53" xlink:to="loc_us-gaap_AwardTypeAxis_CBEC63B6569A568509D4D27CC8F94FEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_FBEDF86F8979590584F5D27CC8F93C10" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_CBEC63B6569A568509D4D27CC8F94FEF" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_FBEDF86F8979590584F5D27CC8F93C10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_9D7A9AA8DE5323C07A61D27CC8F9F4BD" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_FBEDF86F8979590584F5D27CC8F93C10" xlink:to="loc_us-gaap_EmployeeStockOptionMember_9D7A9AA8DE5323C07A61D27CC8F9F4BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PerformanceSharesMember" xlink:label="loc_us-gaap_PerformanceSharesMember_44B25910E35E3DEAE3ECD27CC8F9DC4E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_FBEDF86F8979590584F5D27CC8F93C10" xlink:to="loc_us-gaap_PerformanceSharesMember_44B25910E35E3DEAE3ECD27CC8F9DC4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_884CC6D608F439E0E41BD27CC8F9878C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D54907681C030CB26A4CD27CC8F99D53" xlink:to="loc_us-gaap_RangeAxis_884CC6D608F439E0E41BD27CC8F9878C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_58B9E042727114301044D27CC8F9A53B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_884CC6D608F439E0E41BD27CC8F9878C" xlink:to="loc_us-gaap_RangeMember_58B9E042727114301044D27CC8F9A53B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_DD784DE941C7120D2CF8D27CC8FAD3FC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_58B9E042727114301044D27CC8F9A53B" xlink:to="loc_us-gaap_MinimumMember_DD784DE941C7120D2CF8D27CC8FAD3FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_E0825B2F04E87D241066D27CC8FA9C2E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_58B9E042727114301044D27CC8F9A53B" xlink:to="loc_us-gaap_MaximumMember_E0825B2F04E87D241066D27CC8FA9C2E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_881BC92A5E95A9ACCF04D27CC8FAB200" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D54907681C030CB26A4CD27CC8F99D53" xlink:to="loc_us-gaap_PlanNameAxis_881BC92A5E95A9ACCF04D27CC8FAB200" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_FE14147A5C7DB8A6F905D27CC8FA59B8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameAxis_881BC92A5E95A9ACCF04D27CC8FAB200" xlink:to="loc_us-gaap_PlanNameDomain_FE14147A5C7DB8A6F905D27CC8FA59B8" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_LongTermIncentivePlan2006Member" xlink:label="loc_mmsi_LongTermIncentivePlan2006Member_BDB694D0678D539B5875D27CC8FA6253" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_FE14147A5C7DB8A6F905D27CC8FA59B8" xlink:to="loc_mmsi_LongTermIncentivePlan2006Member_BDB694D0678D539B5875D27CC8FA6253" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_EmployeeStockPurchasePlanQualifiedMember" xlink:label="loc_mmsi_EmployeeStockPurchasePlanQualifiedMember_F24086634640280CCABDD27CC8FA229B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_FE14147A5C7DB8A6F905D27CC8FA59B8" xlink:to="loc_mmsi_EmployeeStockPurchasePlanQualifiedMember_F24086634640280CCABDD27CC8FA229B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3F36090F6A1DEA11EF8CD27CC8FA19B8" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_D54907681C030CB26A4CD27CC8F99D53" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3F36090F6A1DEA11EF8CD27CC8FA19B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_A3746065615245707960D27CC8FA1DC7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3F36090F6A1DEA11EF8CD27CC8FA19B8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_A3746065615245707960D27CC8FA1DC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_410AA376610A84E8537CD27CC8FAABB9" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3F36090F6A1DEA11EF8CD27CC8FA19B8" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_410AA376610A84E8537CD27CC8FAABB9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_AB24A2F019B2A65817C1D27CC8FA7BD4" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3F36090F6A1DEA11EF8CD27CC8FA19B8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_AB24A2F019B2A65817C1D27CC8FA7BD4" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ShareBasedCompensationArrangementEmployeeStockPurchasePlanPercentageofMarketPricePurchaseDate" xlink:label="loc_mmsi_ShareBasedCompensationArrangementEmployeeStockPurchasePlanPercentageofMarketPricePurchaseDate_AD54F67F663BF9C574AED27CC8FA2F0E" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3F36090F6A1DEA11EF8CD27CC8FA19B8" xlink:to="loc_mmsi_ShareBasedCompensationArrangementEmployeeStockPurchasePlanPercentageofMarketPricePurchaseDate_AD54F67F663BF9C574AED27CC8FA2F0E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_D5DE4C39F90E57FB0FB4D27CC8FAAA32" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3F36090F6A1DEA11EF8CD27CC8FA19B8" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_D5DE4C39F90E57FB0FB4D27CC8FAAA32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_4C0AB6C3F1ECCD0A9FE1D27CC8FA5F62" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3F36090F6A1DEA11EF8CD27CC8FA19B8" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_4C0AB6C3F1ECCD0A9FE1D27CC8FA5F62" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_6D2C3C0B0DB007906FCCD27CC8FA2310" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3F36090F6A1DEA11EF8CD27CC8FA19B8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_6D2C3C0B0DB007906FCCD27CC8FA2310" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_FairValueOfStockOptionOnGrantDateNetOfForfeitures" xlink:label="loc_mmsi_FairValueOfStockOptionOnGrantDateNetOfForfeitures_EC61AB56B27FD947BA89D27CC8FABC13" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3F36090F6A1DEA11EF8CD27CC8FA19B8" xlink:to="loc_mmsi_FairValueOfStockOptionOnGrantDateNetOfForfeitures_EC61AB56B27FD947BA89D27CC8FABC13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_D6A4DEDF69452FC93ACCD27CC8FB6690" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_3F36090F6A1DEA11EF8CD27CC8FA19B8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_D6A4DEDF69452FC93ACCD27CC8FB6690" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsOptionsOutstandingDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_8CC755CD6993D50FA2708105CA60E420" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_86FFA18396CD46801C2C8105CA60E129" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_8CC755CD6993D50FA2708105CA60E420" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_86FFA18396CD46801C2C8105CA60E129" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_0D9F91E78A5DD85C23358105CA61D30F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_86FFA18396CD46801C2C8105CA60E129" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_0D9F91E78A5DD85C23358105CA61D30F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_278884CBCE901E28F84E8105CA61A589" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_0D9F91E78A5DD85C23358105CA61D30F" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_278884CBCE901E28F84E8105CA61A589" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RangeOneMember" xlink:label="loc_mmsi_RangeOneMember_1D996DD32D11E61D26518105CA61A875" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_278884CBCE901E28F84E8105CA61A589" xlink:to="loc_mmsi_RangeOneMember_1D996DD32D11E61D26518105CA61A875" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RangeTwoMember" xlink:label="loc_mmsi_RangeTwoMember_95CE091CBC97CD6E693D8105CA62A78C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_278884CBCE901E28F84E8105CA61A589" xlink:to="loc_mmsi_RangeTwoMember_95CE091CBC97CD6E693D8105CA62A78C" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RangeThreeMember" xlink:label="loc_mmsi_RangeThreeMember_DFF489566E9DCEECAE298105CA6259E6" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_278884CBCE901E28F84E8105CA61A589" xlink:to="loc_mmsi_RangeThreeMember_DFF489566E9DCEECAE298105CA6259E6" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RangeFourMember" xlink:label="loc_mmsi_RangeFourMember_E39923E65A14C98841BB8105CA62D133" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_278884CBCE901E28F84E8105CA61A589" xlink:to="loc_mmsi_RangeFourMember_E39923E65A14C98841BB8105CA62D133" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_E3408EF17C1004D1F2B38105CA62C019" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_86FFA18396CD46801C2C8105CA60E129" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_E3408EF17C1004D1F2B38105CA62C019" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_3678D89C4995B8D295C48105CA62196B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_E3408EF17C1004D1F2B38105CA62C019" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_3678D89C4995B8D295C48105CA62196B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_126F55CF1926A952A6938105CA62029F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_E3408EF17C1004D1F2B38105CA62C019" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_126F55CF1926A952A6938105CA62029F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_E6088B43F960973DEFAD8105CA62AF15" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_E3408EF17C1004D1F2B38105CA62C019" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_E6088B43F960973DEFAD8105CA62AF15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_11FC5569E17EB556987D8105CA6270B7" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_E3408EF17C1004D1F2B38105CA62C019" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_11FC5569E17EB556987D8105CA6270B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_288D9A38CBFFA95845478105CA63EEF6" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_E3408EF17C1004D1F2B38105CA62C019" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_288D9A38CBFFA95845478105CA63EEF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_7B9C10F69608F62847B08105CA63084F" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_E3408EF17C1004D1F2B38105CA62C019" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_7B9C10F69608F62847B08105CA63084F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_44880789D2B57F9B2AF08105CA6366CF" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_E3408EF17C1004D1F2B38105CA62C019" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_44880789D2B57F9B2AF08105CA6366CF" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsStockOptionActivityDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_0281EE9BE99AFAC8BFF2D27CCA772783" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_0281EE9BE99AFAC8BFF2D27CCA772783" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions_EC2B0FCC84CA25E03C38D27CCA78397F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions_EC2B0FCC84CA25E03C38D27CCA78397F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions_A04619277531A9104DAED27CCA782EDD" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExerciseOfStockOptions_A04619277531A9104DAED27CCA782EDD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_7EB6106749B713F36F4AD27CCA7810B1" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_7EB6106749B713F36F4AD27CCA7810B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_90A71BCB57645DE80E9FD27CCA78C467" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_7EB6106749B713F36F4AD27CCA7810B1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_90A71BCB57645DE80E9FD27CCA78C467" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_B89DD08D84BFEDD76A63D27CCA783378" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_7EB6106749B713F36F4AD27CCA7810B1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_B89DD08D84BFEDD76A63D27CCA783378" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_2702AD16D69FD8745F54D27CCA787EA4" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_7EB6106749B713F36F4AD27CCA7810B1" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_2702AD16D69FD8745F54D27CCA787EA4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_CCEEF5D2E7807AD07FCBD27CCA78F890" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_7EB6106749B713F36F4AD27CCA7810B1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_CCEEF5D2E7807AD07FCBD27CCA78F890" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_22469A566B90DDB4BA37D27CCA78D9F3" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_7EB6106749B713F36F4AD27CCA7810B1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_22469A566B90DDB4BA37D27CCA78D9F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_4DDA79D8744119827219D27CCA786BC5" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_4DDA79D8744119827219D27CCA786BC5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_5DD43DD66581EA8C570ED27CCA782C16" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_5DD43DD66581EA8C570ED27CCA782C16" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8AF11870CC45DA54C2A4D27CCA7867ED" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8AF11870CC45DA54C2A4D27CCA7867ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_DF08451A0F183106CEBAD27CCA78B4D8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8AF11870CC45DA54C2A4D27CCA7867ED" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_DF08451A0F183106CEBAD27CCA78B4D8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_E66FB7E2D431F5F2BD0ED27CCA78154D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8AF11870CC45DA54C2A4D27CCA7867ED" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_E66FB7E2D431F5F2BD0ED27CCA78154D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_71C263B0CAD1BEFB4B9CD27CCA786A85" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8AF11870CC45DA54C2A4D27CCA7867ED" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_71C263B0CAD1BEFB4B9CD27CCA786A85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_F05C248EAE63FC25B5BED27CCA780BDE" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8AF11870CC45DA54C2A4D27CCA7867ED" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_F05C248EAE63FC25B5BED27CCA780BDE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_6B201CCF2DB236033B9FD27CCA79D30F" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_8AF11870CC45DA54C2A4D27CCA7867ED" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_6B201CCF2DB236033B9FD27CCA79D30F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_01C5312140CC2A5FD2C8D27CCA796017" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_01C5312140CC2A5FD2C8D27CCA796017" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_AC27474461C8AA35F990D27CCA796CDE" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_AC27474461C8AA35F990D27CCA796CDE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_C2B1C278E9B208011245D27CCA7EF134" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_C2B1C278E9B208011245D27CCA7EF134" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_3DCBE8E07C799D7B0EC5D27CCA7E4E70" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_3DCBE8E07C799D7B0EC5D27CCA7E4E70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_3108ACA7510715453E4BD27CCA7E0249" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_3108ACA7510715453E4BD27CCA7E0249" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_85ABE4A6CF72B84AF537D27CCA7EEFC6" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_85ABE4A6CF72B84AF537D27CCA7EEFC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_81977B2A1B6744A00280D27CCA7E6719" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_81977B2A1B6744A00280D27CCA7E6719" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_1C92A05D63F759BA11BFD27CCA7EFF91" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_DE045D3EE0F1610161F5D27CCA77C401" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_1C92A05D63F759BA11BFD27CCA7EFF91" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/EmployeeStockPurchasePlanStockOptionsAndWarrantsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CC62E4783DF1BA5C9386D27CCC041F1D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_2769D81D5DEB08BB1E73D27CCC0475E3" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CC62E4783DF1BA5C9386D27CCC041F1D" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_2769D81D5DEB08BB1E73D27CCC0475E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_16B66560DA12091DED45D27CCC04BC0C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CC62E4783DF1BA5C9386D27CCC041F1D" xlink:to="loc_us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_16B66560DA12091DED45D27CCC04BC0C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAndExercisableTableTextBlock" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAndExercisableTableTextBlock_A41697AB5EF9D1BC46B9D27CCC041984" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CC62E4783DF1BA5C9386D27CCC041F1D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAndExercisableTableTextBlock_A41697AB5EF9D1BC46B9D27CCC041984" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_6F9BF60D34EE48FFCA47D27CCC047E91" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CC62E4783DF1BA5C9386D27CCC041F1D" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_6F9BF60D34EE48FFCA47D27CCC047E91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_CF15864577E35BC17DA5D27CCC045612" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_CC62E4783DF1BA5C9386D27CCC041F1D" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_CF15864577E35BC17DA5D27CCC045612" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/FairValueMeasurements" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_695F151671F99C80B8C2D27CC9FA5707" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_5DA1E35985D891215C50D27CC9FA0D6E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_695F151671F99C80B8C2D27CC9FA5707" xlink:to="loc_us-gaap_FairValueDisclosuresTextBlock_5DA1E35985D891215C50D27CC9FA0D6E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/FairValueMeasurementsFairValueInputsLiabilitiesQuantitativeInformationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_9EA94C47E209C50377CD8729F0182E21" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTable" xlink:label="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTable_A6A28215C9CE0D1107DD8729F01ABE69" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_9EA94C47E209C50377CD8729F0182E21" xlink:to="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTable_A6A28215C9CE0D1107DD8729F01ABE69" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ContingentConsiderationByTypeAxis" xlink:label="loc_us-gaap_ContingentConsiderationByTypeAxis_AA1D19991075C70405648729F01BE350" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTable_A6A28215C9CE0D1107DD8729F01ABE69" xlink:to="loc_us-gaap_ContingentConsiderationByTypeAxis_AA1D19991075C70405648729F01BE350" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ContingentConsiderationTypeDomain" xlink:label="loc_us-gaap_ContingentConsiderationTypeDomain_F3338AF928B6A79AC86A8729F01C8DC2" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ContingentConsiderationByTypeAxis_AA1D19991075C70405648729F01BE350" xlink:to="loc_us-gaap_ContingentConsiderationTypeDomain_F3338AF928B6A79AC86A8729F01C8DC2" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RevenueBasedPaymentsMember" xlink:label="loc_mmsi_RevenueBasedPaymentsMember_2EEE48E0D42EFBF1427B8729F01CCB77" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ContingentConsiderationTypeDomain_F3338AF928B6A79AC86A8729F01C8DC2" xlink:to="loc_mmsi_RevenueBasedPaymentsMember_2EEE48E0D42EFBF1427B8729F01CCB77" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_OtherPaymentsMember" xlink:label="loc_mmsi_OtherPaymentsMember_486A4A1876DF1F285EF08729F01C71DB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ContingentConsiderationTypeDomain_F3338AF928B6A79AC86A8729F01C8DC2" xlink:to="loc_mmsi_OtherPaymentsMember_486A4A1876DF1F285EF08729F01C71DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByLiabilityClassAxis" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_C0B0C9ABFB77B73A636D8729F01C01DC" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTable_A6A28215C9CE0D1107DD8729F01ABE69" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_C0B0C9ABFB77B73A636D8729F01C01DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_E5CEE33FD16725F70D2E8729F01C73D7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_C0B0C9ABFB77B73A636D8729F01C01DC" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_E5CEE33FD16725F70D2E8729F01C73D7" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ContingentConsiderationMember" xlink:label="loc_mmsi_ContingentConsiderationMember_DE4E015C59EF5175BE768729F01CDB7B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_E5CEE33FD16725F70D2E8729F01C73D7" xlink:to="loc_mmsi_ContingentConsiderationMember_DE4E015C59EF5175BE768729F01CDB7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_AF6EB53BA64077ACBFC88729F01C5348" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTable_A6A28215C9CE0D1107DD8729F01ABE69" xlink:to="loc_us-gaap_RangeAxis_AF6EB53BA64077ACBFC88729F01C5348" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_CF2F354912252158E69D8729F01D63CA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_AF6EB53BA64077ACBFC88729F01C5348" xlink:to="loc_us-gaap_RangeMember_CF2F354912252158E69D8729F01D63CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_7D9EB6C75981139C367B8729F01D6A9A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_CF2F354912252158E69D8729F01D63CA" xlink:to="loc_us-gaap_MinimumMember_7D9EB6C75981139C367B8729F01D6A9A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_13CC95A95ACF864DB0848729F01D0DC3" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_CF2F354912252158E69D8729F01D63CA" xlink:to="loc_us-gaap_MaximumMember_13CC95A95ACF864DB0848729F01D0DC3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationTechniqueAxis" xlink:label="loc_us-gaap_ValuationTechniqueAxis_B3362676C0CAABD86E708729F01D9102" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTable_A6A28215C9CE0D1107DD8729F01ABE69" xlink:to="loc_us-gaap_ValuationTechniqueAxis_B3362676C0CAABD86E708729F01D9102" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="loc_us-gaap_ValuationTechniqueDomain_76D258F75D6990AA4E1B8729F01D87C7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationTechniqueAxis_B3362676C0CAABD86E708729F01D9102" xlink:to="loc_us-gaap_ValuationTechniqueDomain_76D258F75D6990AA4E1B8729F01D87C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeApproachValuationTechniqueMember" xlink:label="loc_us-gaap_IncomeApproachValuationTechniqueMember_0906C08F17EB06F6202F8729F01D4809" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationTechniqueDomain_76D258F75D6990AA4E1B8729F01D87C7" xlink:to="loc_us-gaap_IncomeApproachValuationTechniqueMember_0906C08F17EB06F6202F8729F01D4809" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_AE559AC4609AD2A3E7098729F01D5E13" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTable_A6A28215C9CE0D1107DD8729F01ABE69" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_AE559AC4609AD2A3E7098729F01D5E13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0C414A2DA8AB223E2A4D8729F01DC7AA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_AE559AC4609AD2A3E7098729F01D5E13" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0C414A2DA8AB223E2A4D8729F01DC7AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_E4A7D0AD8A17A96E30C08729F01E6210" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0C414A2DA8AB223E2A4D8729F01DC7AA" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_E4A7D0AD8A17A96E30C08729F01E6210" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLiabilitiesQuantitativeInformationLineItems" xlink:label="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationLineItems_C8107E2E8103D108DF968729F01E5294" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTable_A6A28215C9CE0D1107DD8729F01ABE69" xlink:to="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationLineItems_C8107E2E8103D108DF968729F01E5294" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_0DB167E9E2DFA18166AE8729F01E0232" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationLineItems_C8107E2E8103D108DF968729F01E5294" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_0DB167E9E2DFA18166AE8729F01E0232" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_EA4DED2DD43368EB0C558729F01F972F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationLineItems_C8107E2E8103D108DF968729F01E5294" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_EA4DED2DD43368EB0C558729F01F972F" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_FairValueInputsProbabilityOfMilestonePayment" xlink:label="loc_mmsi_FairValueInputsProbabilityOfMilestonePayment_903F19B26B08CE2A8B7A8729F01FB29A" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationLineItems_C8107E2E8103D108DF968729F01E5294" xlink:to="loc_mmsi_FairValueInputsProbabilityOfMilestonePayment_903F19B26B08CE2A8B7A8729F01FB29A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsDiscountRate" xlink:label="loc_us-gaap_FairValueInputsDiscountRate_63735D93A61BC4FAB1258729F01F09C3" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationLineItems_C8107E2E8103D108DF968729F01E5294" xlink:to="loc_us-gaap_FairValueInputsDiscountRate_63735D93A61BC4FAB1258729F01F09C3" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/FairValueMeasurementsFinancialAssetsAndLiabilitiesCarriedAtFairValueDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_E9A04D3B24414E2EF1DD87685B79D4C4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A7B3AA10975445DD15DC87685B79BFE6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_E9A04D3B24414E2EF1DD87685B79D4C4" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A7B3AA10975445DD15DC87685B79BFE6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_6495A3ADFB2F7FCD58B287685B79D1CF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A7B3AA10975445DD15DC87685B79BFE6" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_6495A3ADFB2F7FCD58B287685B79D1CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_14154167D17A7AA4407F87685B79F926" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_6495A3ADFB2F7FCD58B287685B79D1CF" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_14154167D17A7AA4407F87685B79F926" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_380D1FCA0048FB3E7BDB87685B7972A7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_14154167D17A7AA4407F87685B79F926" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_380D1FCA0048FB3E7BDB87685B7972A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_71F9271AA00C7F111CB487685B7AACB5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_380D1FCA0048FB3E7BDB87685B7972A7" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_71F9271AA00C7F111CB487685B7AACB5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_19C77E6CD4160C367A0587685B7A2447" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A7B3AA10975445DD15DC87685B79BFE6" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_19C77E6CD4160C367A0587685B7A2447" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_9CAA4248DCE03ED9B8CD87685B7AF542" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_19C77E6CD4160C367A0587685B7A2447" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_9CAA4248DCE03ED9B8CD87685B7AF542" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_6C9467D6F72C8198C1AA87685B7A47F4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_9CAA4248DCE03ED9B8CD87685B7AF542" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_6C9467D6F72C8198C1AA87685B7A47F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_32C0102B4CFFA8CA155687685B7AD9B1" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A7B3AA10975445DD15DC87685B79BFE6" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_32C0102B4CFFA8CA155687685B7AD9B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_012D894DE2DEB652A70487685B7AC5BC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_32C0102B4CFFA8CA155687685B7AD9B1" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_012D894DE2DEB652A70487685B7AC5BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_307F7788BA03F6E8CC3487685B7A4713" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_012D894DE2DEB652A70487685B7AC5BC" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_307F7788BA03F6E8CC3487685B7A4713" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_34EF9098626C9F301FCB87685B7B1097" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_012D894DE2DEB652A70487685B7AC5BC" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_34EF9098626C9F301FCB87685B7B1097" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_B3B8D44EBB2338E6916587685B7BFE7D" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_012D894DE2DEB652A70487685B7AC5BC" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_B3B8D44EBB2338E6916587685B7BFE7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_40307E2FA630DB73101187685B7B7661" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A7B3AA10975445DD15DC87685B79BFE6" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_40307E2FA630DB73101187685B7B7661" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestRateCashFlowHedgeAssetAtFairValue" xlink:label="loc_us-gaap_InterestRateCashFlowHedgeAssetAtFairValue_E9BFB63C8A179F90E92487685B7B66F9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_40307E2FA630DB73101187685B7B7661" xlink:to="loc_us-gaap_InterestRateCashFlowHedgeAssetAtFairValue_E9BFB63C8A179F90E92487685B7B66F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCurrencyContractAssetFairValueDisclosure" xlink:label="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_13B5B831710F7D9E9D4A87685B7B7125" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_40307E2FA630DB73101187685B7B7661" xlink:to="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_13B5B831710F7D9E9D4A87685B7B7125" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure" xlink:label="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_CE24069C27E8501D4FB887685B7B625B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_40307E2FA630DB73101187685B7B7661" xlink:to="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_CE24069C27E8501D4FB887685B7B625B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue" xlink:label="loc_us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_733DAA6519A03E5245DA87685B7BAAEC" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_40307E2FA630DB73101187685B7B7661" xlink:to="loc_us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_733DAA6519A03E5245DA87685B7BAAEC" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/FairValueMeasurementsLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_7B2C82600BC0CC589684D27CC91BA226" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_6E9671568A1E26EC5503D27CC91B18CC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_7B2C82600BC0CC589684D27CC91BA226" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_6E9671568A1E26EC5503D27CC91B18CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByLiabilityClassAxis" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_7E46A0D4480B524E2CCED27CC91B6B6D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_6E9671568A1E26EC5503D27CC91B18CC" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_7E46A0D4480B524E2CCED27CC91B6B6D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_7AAF37C064798734EA9ED27CC91BDF19" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_7E46A0D4480B524E2CCED27CC91B6B6D" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_7AAF37C064798734EA9ED27CC91BDF19" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ContingentConsiderationMember" xlink:label="loc_mmsi_ContingentConsiderationMember_6FF547F862697C686965D27CC91BFEB8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_7AAF37C064798734EA9ED27CC91BDF19" xlink:to="loc_mmsi_ContingentConsiderationMember_6FF547F862697C686965D27CC91BFEB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_37A908F19D834B9C9F0AD27CC91C6CDB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_6E9671568A1E26EC5503D27CC91B18CC" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_37A908F19D834B9C9F0AD27CC91C6CDB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_9D46F51ABD4D373FCFCFD27CC91C8284" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_37A908F19D834B9C9F0AD27CC91C6CDB" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_9D46F51ABD4D373FCFCFD27CC91C8284" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_96C5689717E203925653D27CC91C67AC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_9D46F51ABD4D373FCFCFD27CC91C8284" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_96C5689717E203925653D27CC91C67AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_9E904FA6B7F48A797533D27CC91C3207" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_9D46F51ABD4D373FCFCFD27CC91C8284" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_9E904FA6B7F48A797533D27CC91C3207" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_4DD994236ED114111411D27CC91CE072" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_9D46F51ABD4D373FCFCFD27CC91C8284" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_4DD994236ED114111411D27CC91CE072" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_05189FC9F7E41D60BE61D27CC91C8395" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_9D46F51ABD4D373FCFCFD27CC91C8284" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_05189FC9F7E41D60BE61D27CC91C8395" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_F427F39F06DA7A6D896CD27CC91CF61A" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_9D46F51ABD4D373FCFCFD27CC91C8284" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_F427F39F06DA7A6D896CD27CC91CF61A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_58862B0DB40683DB5DF487267976EEE0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_499382DA865F58AFCEAE87267977902D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_58862B0DB40683DB5DF487267976EEE0" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_499382DA865F58AFCEAE87267977902D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_D1FFBA7826A249377066872679778997" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_499382DA865F58AFCEAE87267977902D" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_D1FFBA7826A249377066872679778997" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_31DBDD50BF4F22DD789387267977E857" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_D1FFBA7826A249377066872679778997" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_31DBDD50BF4F22DD789387267977E857" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ContingentConsiderationMember" xlink:label="loc_mmsi_ContingentConsiderationMember_9F518B112FABC04DA9BF872679778B1C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_31DBDD50BF4F22DD789387267977E857" xlink:to="loc_mmsi_ContingentConsiderationMember_9F518B112FABC04DA9BF872679778B1C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ContingentConsiderationByTypeAxis" xlink:label="loc_us-gaap_ContingentConsiderationByTypeAxis_44A916E467D40FB0334287267978A7F7" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_499382DA865F58AFCEAE87267977902D" xlink:to="loc_us-gaap_ContingentConsiderationByTypeAxis_44A916E467D40FB0334287267978A7F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ContingentConsiderationTypeDomain" xlink:label="loc_us-gaap_ContingentConsiderationTypeDomain_2B75A2B889D6388F514C87267978BC38" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ContingentConsiderationByTypeAxis_44A916E467D40FB0334287267978A7F7" xlink:to="loc_us-gaap_ContingentConsiderationTypeDomain_2B75A2B889D6388F514C87267978BC38" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_OtherPaymentsMember" xlink:label="loc_mmsi_OtherPaymentsMember_8134259706007A02FBA7872679783667" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ContingentConsiderationTypeDomain_2B75A2B889D6388F514C87267978BC38" xlink:to="loc_mmsi_OtherPaymentsMember_8134259706007A02FBA7872679783667" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ContingentReceivableMember" xlink:label="loc_mmsi_ContingentReceivableMember_ACBD7ACD430721AD9023872679786AAB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ContingentConsiderationTypeDomain_2B75A2B889D6388F514C87267978BC38" xlink:to="loc_mmsi_ContingentReceivableMember_ACBD7ACD430721AD9023872679786AAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByLiabilityClassAxis" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_60266F9A90B59E11841787267978B69F" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_499382DA865F58AFCEAE87267977902D" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_60266F9A90B59E11841787267978B69F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_7571388D35F465EDE03087267978E63E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_60266F9A90B59E11841787267978B69F" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_7571388D35F465EDE03087267978E63E" xlink:type="arc" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_7571388D35F465EDE03087267978E63E" xlink:to="loc_mmsi_ContingentConsiderationMember_9F518B112FABC04DA9BF872679778B1C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_7AB9C1BD5F2FD889F2528726797A6CA8" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_499382DA865F58AFCEAE87267977902D" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_7AB9C1BD5F2FD889F2528726797A6CA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_D65D6FA0A8B4A7BFC8A68726797AD315" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_7AB9C1BD5F2FD889F2528726797A6CA8" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_D65D6FA0A8B4A7BFC8A68726797AD315" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_OtherLongTermObligationsMember" xlink:label="loc_mmsi_OtherLongTermObligationsMember_E4228C6A5C447D8690E58726797AB382" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_D65D6FA0A8B4A7BFC8A68726797AD315" xlink:to="loc_mmsi_OtherLongTermObligationsMember_E4228C6A5C447D8690E58726797AB382" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccruedLiabilitiesMember" xlink:label="loc_us-gaap_AccruedLiabilitiesMember_E2A615C09C9958C78AC18726797AFD85" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_D65D6FA0A8B4A7BFC8A68726797AD315" xlink:to="loc_us-gaap_AccruedLiabilitiesMember_E2A615C09C9958C78AC18726797AFD85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherNoncurrentAssetsMember" xlink:label="loc_us-gaap_OtherNoncurrentAssetsMember_31C4901B26BA20C422E78726797AE6B0" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_D65D6FA0A8B4A7BFC8A68726797AD315" xlink:to="loc_us-gaap_OtherNoncurrentAssetsMember_31C4901B26BA20C422E78726797AE6B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherCurrentAssetsMember" xlink:label="loc_us-gaap_OtherCurrentAssetsMember_6383FB4DD250ACFAA5A68726797A116C" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_D65D6FA0A8B4A7BFC8A68726797AD315" xlink:to="loc_us-gaap_OtherCurrentAssetsMember_6383FB4DD250ACFAA5A68726797A116C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5181FEAC1BE9086893838726797A40B3" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_499382DA865F58AFCEAE87267977902D" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5181FEAC1BE9086893838726797A40B3" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedContingentLiabilityNoncurrent" xlink:label="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedContingentLiabilityNoncurrent_8F3804CAC4FA86443D8E8726797A9111" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5181FEAC1BE9086893838726797A40B3" xlink:to="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedContingentLiabilityNoncurrent_8F3804CAC4FA86443D8E8726797A9111" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedContingentLiabilityCurrent" xlink:label="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedContingentLiabilityCurrent_971B4636077712AF7E358726797B9517" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5181FEAC1BE9086893838726797A40B3" xlink:to="loc_mmsi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedContingentLiabilityCurrent_971B4636077712AF7E358726797B9517" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssetImpairmentCharges" xlink:label="loc_us-gaap_OtherAssetImpairmentCharges_12B1C0C7762831ECE6DD8726797B018D" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5181FEAC1BE9086893838726797A40B3" xlink:to="loc_us-gaap_OtherAssetImpairmentCharges_12B1C0C7762831ECE6DD8726797B018D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_1072CDAFCF03055F1BAB8726797B9195" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5181FEAC1BE9086893838726797A40B3" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_1072CDAFCF03055F1BAB8726797B9195" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_B4BECBE7ADC0345E15278726797B3E77" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5181FEAC1BE9086893838726797A40B3" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_B4BECBE7ADC0345E15278726797B3E77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_FFD239C88F2A309A1A398726797BB9B8" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5181FEAC1BE9086893838726797A40B3" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_FFD239C88F2A309A1A398726797BB9B8" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/FairValueMeasurementsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_5515899D350D08FAB25FD27CC94BBC8A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_107CC2907AA76AADE718D27CC94B8312" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_5515899D350D08FAB25FD27CC94BBC8A" xlink:to="loc_us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_107CC2907AA76AADE718D27CC94B8312" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_FF2349ABD7FDDEEB98CCD27CC94BADDA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_5515899D350D08FAB25FD27CC94BBC8A" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_FF2349ABD7FDDEEB98CCD27CC94BADDA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTableTextBlock" xlink:label="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTableTextBlock_1D5147335659EB7074E8D27CC94C8B7C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_5515899D350D08FAB25FD27CC94BBC8A" xlink:to="loc_us-gaap_FairValueInputsLiabilitiesQuantitativeInformationTableTextBlock_1D5147335659EB7074E8D27CC94C8B7C" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/GoodwillAndIntangibleAssets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_89AFBCD3BA88B92E4DF1D27CCA80340B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_0F454AE74113CD16B14AD27CCA80B92A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_89AFBCD3BA88B92E4DF1D27CCA80340B" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_0F454AE74113CD16B14AD27CCA80B92A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/GoodwillAndIntangibleAssetsFutureAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_F5DAFA1284A86F69758DD27CCBC37752" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_F6AAE055CC6524D3F13AD27CCBC4FAC4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_F5DAFA1284A86F69758DD27CCBC37752" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_F6AAE055CC6524D3F13AD27CCBC4FAC4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_1065C4C4FC6165646A16D27CCBC4CDD1" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_F5DAFA1284A86F69758DD27CCBC37752" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_1065C4C4FC6165646A16D27CCBC4CDD1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_E602E64A1DBB8AAA8AB7D27CCBC42940" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_F5DAFA1284A86F69758DD27CCBC37752" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_E602E64A1DBB8AAA8AB7D27CCBC42940" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_8BA82CB22E502771D2A2D27CCBC4187E" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_F5DAFA1284A86F69758DD27CCBC37752" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_8BA82CB22E502771D2A2D27CCBC4187E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_2073C1C0D2EB6F5A2841D27CCBC428A1" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_F5DAFA1284A86F69758DD27CCBC37752" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_2073C1C0D2EB6F5A2841D27CCBC428A1" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/GoodwillAndIntangibleAssetsGoodwillDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_1F624D2E35CC1290A4DCD27CC912C97D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_4F5A2A40EF4B0D7E55CED27CC9122A35" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_1F624D2E35CC1290A4DCD27CC912C97D" xlink:to="loc_us-gaap_GoodwillRollForward_4F5A2A40EF4B0D7E55CED27CC9122A35" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_9C68CD69762F9B4A75ABD27CC912D54A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_4F5A2A40EF4B0D7E55CED27CC9122A35" xlink:to="loc_us-gaap_Goodwill_9C68CD69762F9B4A75ABD27CC912D54A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_7CC32AFC1E6E0A17E913D27CC912BBD3" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_4F5A2A40EF4B0D7E55CED27CC9122A35" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_7CC32AFC1E6E0A17E913D27CC912BBD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_8E1B48221E83221D06EED27CC912BDFD" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_4F5A2A40EF4B0D7E55CED27CC9122A35" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_8E1B48221E83221D06EED27CC912BDFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_7520663A6788E6F8773ED27CC912530E" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillRollForward_4F5A2A40EF4B0D7E55CED27CC9122A35" xlink:to="loc_us-gaap_Goodwill_7520663A6788E6F8773ED27CC912530E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/GoodwillAndIntangibleAssetsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_2D9BE143928AA1D020B98114F861C5B6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_85CACC1B26ECA99C62378114F86164F8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_2D9BE143928AA1D020B98114F861C5B6" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_85CACC1B26ECA99C62378114F86164F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_BC2DC2E18D2A92E784B78114F8612A02" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_85CACC1B26ECA99C62378114F86164F8" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_BC2DC2E18D2A92E784B78114F8612A02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D2663963AAD47A9694C28114F8613364" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_BC2DC2E18D2A92E784B78114F8612A02" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D2663963AAD47A9694C28114F8613364" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_OstialSolutionsLlcMember" xlink:label="loc_mmsi_OstialSolutionsLlcMember_19955CDADD2490ACBEB98114F86142A7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_D2663963AAD47A9694C28114F8613364" xlink:to="loc_mmsi_OstialSolutionsLlcMember_19955CDADD2490ACBEB98114F86142A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_03122F50A68438D6DB378114F86191BE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_85CACC1B26ECA99C62378114F86164F8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_03122F50A68438D6DB378114F86191BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_F9C1B00898820BF608318114F861019E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_03122F50A68438D6DB378114F86191BE" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_F9C1B00898820BF608318114F861019E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_7A5BE21EBB9F404767138114F8619CF4" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_03122F50A68438D6DB378114F86191BE" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_7A5BE21EBB9F404767138114F8619CF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_6D89CCF00272F4D8209B8114F861F379" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_03122F50A68438D6DB378114F86191BE" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment_6D89CCF00272F4D8209B8114F861F379" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_2BF5F905670EEDD1C2A38114F8617CE0" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_03122F50A68438D6DB378114F86191BE" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_2BF5F905670EEDD1C2A38114F8617CE0" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/GoodwillAndIntangibleAssetsOtherIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_EDE66EE1983ABD80ED85D27CC9BDB74B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_1934B846D16264A69312D27CC9BECFC5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_EDE66EE1983ABD80ED85D27CC9BDB74B" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_1934B846D16264A69312D27CC9BECFC5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_5C44622223FCE1CECB05D27CC9BE3545" xlink:type="locator" />
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_1934B846D16264A69312D27CC9BECFC5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_5C44622223FCE1CECB05D27CC9BE3545" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_F052F952CA2064AD7216D27CC9BE2716" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_5C44622223FCE1CECB05D27CC9BE3545" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_F052F952CA2064AD7216D27CC9BE2716" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_BDCC066C1F7977485296D27CC9BE6AA2" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_F052F952CA2064AD7216D27CC9BE2716" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_BDCC066C1F7977485296D27CC9BE6AA2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PatentsMember" xlink:label="loc_us-gaap_PatentsMember_BDB63D65E37513125ABAD27CC9BE9645" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIntangibleAssetsMember_BDCC066C1F7977485296D27CC9BE6AA2" xlink:to="loc_us-gaap_PatentsMember_BDB63D65E37513125ABAD27CC9BE9645" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DistributionRightsMember" xlink:label="loc_us-gaap_DistributionRightsMember_30AA2FD72C95C3384BCED27CC9BED435" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIntangibleAssetsMember_BDCC066C1F7977485296D27CC9BE6AA2" xlink:to="loc_us-gaap_DistributionRightsMember_30AA2FD72C95C3384BCED27CC9BED435" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LicensingAgreementsMember" xlink:label="loc_us-gaap_LicensingAgreementsMember_86DA370BE6256DA6F4D3D27CC9BE4DD0" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIntangibleAssetsMember_BDCC066C1F7977485296D27CC9BE6AA2" xlink:to="loc_us-gaap_LicensingAgreementsMember_86DA370BE6256DA6F4D3D27CC9BE4DD0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_7BA08DCC050413D2A267D27CC9BE0A0D" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIntangibleAssetsMember_BDCC066C1F7977485296D27CC9BE6AA2" xlink:to="loc_us-gaap_TrademarksMember_7BA08DCC050413D2A267D27CC9BE0A0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NoncompeteAgreementsMember" xlink:label="loc_us-gaap_NoncompeteAgreementsMember_5F119C387123DDFDB10FD27CC9BEBDE5" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIntangibleAssetsMember_BDCC066C1F7977485296D27CC9BE6AA2" xlink:to="loc_us-gaap_NoncompeteAgreementsMember_5F119C387123DDFDB10FD27CC9BEBDE5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CustomerListsMember" xlink:label="loc_us-gaap_CustomerListsMember_06B9A75CB3A9E70C351BD27CC9BEF2A4" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIntangibleAssetsMember_BDCC066C1F7977485296D27CC9BE6AA2" xlink:to="loc_us-gaap_CustomerListsMember_06B9A75CB3A9E70C351BD27CC9BEF2A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RoyaltyAgreementsMember" xlink:label="loc_us-gaap_RoyaltyAgreementsMember_4CAC258D023B54A34870D27CC9BF839F" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherIntangibleAssetsMember_BDCC066C1F7977485296D27CC9BE6AA2" xlink:to="loc_us-gaap_RoyaltyAgreementsMember_4CAC258D023B54A34870D27CC9BF839F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_004F30AE803B2B40C2B6D27CC9BF3AB2" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_1934B846D16264A69312D27CC9BECFC5" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_004F30AE803B2B40C2B6D27CC9BF3AB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_304A5C52B1EC5721A0E2D27CC9BFE6C2" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_004F30AE803B2B40C2B6D27CC9BF3AB2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_304A5C52B1EC5721A0E2D27CC9BFE6C2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_3735259AF07E6192FEF8D27CC9BF002B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_004F30AE803B2B40C2B6D27CC9BF3AB2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_3735259AF07E6192FEF8D27CC9BF002B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_7F9D01BEA4F6F2EAD8EDD27CC9BF8DF0" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_004F30AE803B2B40C2B6D27CC9BF3AB2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_7F9D01BEA4F6F2EAD8EDD27CC9BF8DF0" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/GoodwillAndIntangibleAssetsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_1725163D7FBCDB75CFA4D27CCB541778" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfGoodwillTextBlock" xlink:label="loc_us-gaap_ScheduleOfGoodwillTextBlock_769A3D09C5CCBB1881C5D27CCB5486C5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_1725163D7FBCDB75CFA4D27CCB541778" xlink:to="loc_us-gaap_ScheduleOfGoodwillTextBlock_769A3D09C5CCBB1881C5D27CCB5486C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_527B79AB23E3D2D68F65D27CCB557D40" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_1725163D7FBCDB75CFA4D27CCB541778" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_527B79AB23E3D2D68F65D27CCB557D40" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:label="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_1EF7BD527BBBC8E72388D27CCB552E3E" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_1725163D7FBCDB75CFA4D27CCB541778" xlink:to="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_1EF7BD527BBBC8E72388D27CCB552E3E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/IncomeTaxes" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_F3139D152DB262FCB777D27CCC2A1A12" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_76CC9807F78C00DE785ED27CCC2A331A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_F3139D152DB262FCB777D27CCC2A1A12" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_76CC9807F78C00DE785ED27CCC2A331A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/IncomeTaxesComponentsOfIncomeTaxExpenseBenefitDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_CE6BA7D74C245F29F39163BC42ED1625" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_2F688763B143408287AA63BC42ED39AA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_CE6BA7D74C245F29F39163BC42ED1625" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_2F688763B143408287AA63BC42ED39AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_ED8EA3E556FFD0B2E23F63BC42EDF542" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_2F688763B143408287AA63BC42ED39AA" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_ED8EA3E556FFD0B2E23F63BC42EDF542" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_66B9FB9FBA3843BB858A63BC42ED57AC" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_2F688763B143408287AA63BC42ED39AA" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_66B9FB9FBA3843BB858A63BC42ED57AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_B684B7FEF780F1EB7E9D63BC42ED8ED0" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_2F688763B143408287AA63BC42ED39AA" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_B684B7FEF780F1EB7E9D63BC42ED8ED0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_E890B0979A79414B554363BC42ED2557" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_2F688763B143408287AA63BC42ED39AA" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_E890B0979A79414B554363BC42ED2557" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_6A93BB68FDC934056AD763BC42ED65B8" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_CE6BA7D74C245F29F39163BC42ED1625" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_6A93BB68FDC934056AD763BC42ED65B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_EAAFDA5B1EC91AE2120363BC42ED4801" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_6A93BB68FDC934056AD763BC42ED65B8" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_EAAFDA5B1EC91AE2120363BC42ED4801" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_FCF5E5040CEB17938F7363BC42ED1656" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_6A93BB68FDC934056AD763BC42ED65B8" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_FCF5E5040CEB17938F7363BC42ED1656" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_BCD03D8116B721D45BD863BC42EDE02F" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_6A93BB68FDC934056AD763BC42ED65B8" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_BCD03D8116B721D45BD863BC42EDE02F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_3FD4B8D2424A8655EB1663BC42EDBDC9" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_6A93BB68FDC934056AD763BC42ED65B8" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_3FD4B8D2424A8655EB1663BC42EDBDC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_C687D74187D405E524D463BC42EEEA25" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_CE6BA7D74C245F29F39163BC42ED1625" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_C687D74187D405E524D463BC42EEEA25" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_ED4B9EFDA91E99BBA0EC8105CB51471F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsGrossAbstract" xlink:label="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_ED4B9EFDA91E99BBA0EC8105CB51471F" xlink:to="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReturnsAndAllowances" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReturnsAndAllowances_182C8290423526C1B6348105CB51A31D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReturnsAndAllowances_182C8290423526C1B6348105CB51A31D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation_A00361024659088995728105CB51ADBE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation_A00361024659088995728105CB51ADBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsInventory" xlink:label="loc_us-gaap_DeferredTaxAssetsInventory_FCF75398503F2052699C8105CB527B1B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:to="loc_us-gaap_DeferredTaxAssetsInventory_FCF75398503F2052699C8105CB527B1B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_70193897E07F01AFC1E28105CB52463E" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_70193897E07F01AFC1E28105CB52463E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsDeferredIncome" xlink:label="loc_us-gaap_DeferredTaxAssetsDeferredIncome_589E768C5E1DA4CFBFDC8105CB520234" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:to="loc_us-gaap_DeferredTaxAssetsDeferredIncome_589E768C5E1DA4CFBFDC8105CB520234" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_A587954E87D2674A36368105CB5252EA" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_A587954E87D2674A36368105CB5252EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_6316FBD28724636E00F88105CB52467A" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_6316FBD28724636E00F88105CB52467A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign_6E2C93F2671BC9FBB2BE8105CB520451" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign_6E2C93F2671BC9FBB2BE8105CB520451" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_2292AA7CFEB572587EAA8105CB53DFB6" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_2292AA7CFEB572587EAA8105CB53DFB6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_577E7DE396887BAE85398105CB53F6FE" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxAssetsGrossAbstract_87AF306A54331108D7288105CB51C189" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_577E7DE396887BAE85398105CB53F6FE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesAbstract" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesAbstract_D5C6C65380CB92B0E3F38105CB53D7FB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_ED4B9EFDA91E99BBA0EC8105CB51471F" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesAbstract_D5C6C65380CB92B0E3F38105CB53D7FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesDeferredExpense" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpense_2B4171BB7D1B33A2118F8105CB530B69" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesAbstract_D5C6C65380CB92B0E3F38105CB53D7FB" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesDeferredExpense_2B4171BB7D1B33A2118F8105CB530B69" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_514AF8F58898172EF1688105CB5372A3" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesAbstract_D5C6C65380CB92B0E3F38105CB53D7FB" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_514AF8F58898172EF1688105CB5372A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_1FA9A5263BD9F6142BF28105CB53F48D" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesAbstract_D5C6C65380CB92B0E3F38105CB53D7FB" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_1FA9A5263BD9F6142BF28105CB53F48D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_3398ED852CEF46A15C6D8105CB5392D5" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesAbstract_D5C6C65380CB92B0E3F38105CB53D7FB" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_3398ED852CEF46A15C6D8105CB5392D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_F9E7603CCDBCE3FD64968105CB540E02" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesAbstract_D5C6C65380CB92B0E3F38105CB53D7FB" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_F9E7603CCDBCE3FD64968105CB540E02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_305F0B6CB5FB32E7B8F88105CB54F688" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_ED4B9EFDA91E99BBA0EC8105CB51471F" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_305F0B6CB5FB32E7B8F88105CB54F688" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="loc_us-gaap_DeferredTaxLiabilities_18507674F85239AA8E3D8105CB54C9C3" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_ED4B9EFDA91E99BBA0EC8105CB51471F" xlink:to="loc_us-gaap_DeferredTaxLiabilities_18507674F85239AA8E3D8105CB54C9C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract" xlink:label="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_9A664DDDCDC27C8651688105CB54CC59" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_ED4B9EFDA91E99BBA0EC8105CB51471F" xlink:to="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_9A664DDDCDC27C8651688105CB54CC59" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsNetCurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetCurrent_71533B3D1B5B58E65E2E8105CB54D36A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_9A664DDDCDC27C8651688105CB54CC59" xlink:to="loc_us-gaap_DeferredTaxAssetsNetCurrent_71533B3D1B5B58E65E2E8105CB54D36A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsNetNoncurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_EB7A7115240DEFB332898105CB5488E4" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_9A664DDDCDC27C8651688105CB54CC59" xlink:to="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_EB7A7115240DEFB332898105CB5488E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesCurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesCurrent_AE4C23FFF1DCB830BE488105CB548BFF" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_9A664DDDCDC27C8651688105CB54CC59" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesCurrent_AE4C23FFF1DCB830BE488105CB548BFF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_5F62AC94CAC7622983688105CB55975B" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_9A664DDDCDC27C8651688105CB54CC59" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_5F62AC94CAC7622983688105CB55975B" xlink:type="arc" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ComponentsOfDeferredTaxAssetsAndLiabilitiesAbstract_9A664DDDCDC27C8651688105CB54CC59" xlink:to="loc_us-gaap_DeferredTaxLiabilities_18507674F85239AA8E3D8105CB54C9C3" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/IncomeTaxesDomesticAndForeignDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_5A52E0D09A356D9994E6D27CCAB43688" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_8B69D27051AAF0C2816CD27CCAB4ABA0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_5A52E0D09A356D9994E6D27CCAB43688" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_8B69D27051AAF0C2816CD27CCAB4ABA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_1A64788802EB7870C284D27CCAB42692" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_5A52E0D09A356D9994E6D27CCAB43688" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_1A64788802EB7870C284D27CCAB42692" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_3828252F0734CDD1C16FD27CCAB4F482" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_5A52E0D09A356D9994E6D27CCAB43688" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_3828252F0734CDD1C16FD27CCAB4F482" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_4F8C0E5C368FC1245A088105CB5DAE42" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_A902EAAA98CABCD882968105CB5D101C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_4F8C0E5C368FC1245A088105CB5DAE42" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_A902EAAA98CABCD882968105CB5D101C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_65ED021A8EAB5F72DC828105CB5D4050" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_4F8C0E5C368FC1245A088105CB5DAE42" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_65ED021A8EAB5F72DC828105CB5D4050" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsResearch" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_D1E61C71854F3058F5968105CB5DA66B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_4F8C0E5C368FC1245A088105CB5DAE42" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_D1E61C71854F3058F5968105CB5DA66B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities" xlink:label="loc_us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities_80ECB9352F0ADB097B2F8105CB5D4CBE" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_4F8C0E5C368FC1245A088105CB5DAE42" xlink:to="loc_us-gaap_IncomeTaxReconciliationDeductionsQualifiedProductionActivities_80ECB9352F0ADB097B2F8105CB5D4CBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_86BABD0841FE5B9FA0658105CB5D01D9" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_4F8C0E5C368FC1245A088105CB5DAE42" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_86BABD0841FE5B9FA0658105CB5D01D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxContingencies" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_4D7EEE78709F940630E18105CB5DCF10" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_4F8C0E5C368FC1245A088105CB5DAE42" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_4D7EEE78709F940630E18105CB5DCF10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxExemptIncome" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxExemptIncome_C174D0B4C7585F44C68D8105CB5E3F43" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_4F8C0E5C368FC1245A088105CB5DAE42" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxExemptIncome_C174D0B4C7585F44C68D8105CB5E3F43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpense" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_9EF1214C90E129DFC6BA8105CB5E18A6" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_4F8C0E5C368FC1245A088105CB5DAE42" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_9EF1214C90E129DFC6BA8105CB5E18A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_FB92F9EE978AE27C31288105CB5ED7A2" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_4F8C0E5C368FC1245A088105CB5DAE42" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_FB92F9EE978AE27C31288105CB5ED7A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_2C616692FD2C5AC237378105CB5EC17F" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_4F8C0E5C368FC1245A088105CB5DAE42" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_2C616692FD2C5AC237378105CB5EC17F" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_E927A823A4D74B5E4976D27CC986BE1A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable_224F946038FA8DD62524D27CC9861A74" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_E927A823A4D74B5E4976D27CC986BE1A" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable_224F946038FA8DD62524D27CC9861A74" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_CFA5A66F5901856B2A77D27CC987529C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable_224F946038FA8DD62524D27CC9861A74" xlink:to="loc_us-gaap_RangeAxis_CFA5A66F5901856B2A77D27CC987529C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_B9D3DF7028644D670B29D27CC98CB313" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_CFA5A66F5901856B2A77D27CC987529C" xlink:to="loc_us-gaap_RangeMember_B9D3DF7028644D670B29D27CC98CB313" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_07259DCE27006DA12F9BD27CC98C128B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_B9D3DF7028644D670B29D27CC98CB313" xlink:to="loc_us-gaap_MaximumMember_07259DCE27006DA12F9BD27CC98C128B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable_224F946038FA8DD62524D27CC9861A74" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_BC0603CDF930683DBEEAD27CC98CC129" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_BC0603CDF930683DBEEAD27CC98CC129" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_C7B037C9B10185E263D4D27CC98C5C3A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_C7B037C9B10185E263D4D27CC98C5C3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_DD6E9DA7B2E8AC7E637CD27CC98C73F6" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic_DD6E9DA7B2E8AC7E637CD27CC98C73F6" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_NetOperatingLossCarryforwardsUtilization" xlink:label="loc_mmsi_NetOperatingLossCarryforwardsUtilization_C1FA977B5372FAFA216BD27CC98CDF0C" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_mmsi_NetOperatingLossCarryforwardsUtilization_C1FA977B5372FAFA216BD27CC98CDF0C" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_NetOperatingLossCarryforwardsUsedInCurrentPeriod" xlink:label="loc_mmsi_NetOperatingLossCarryforwardsUsedInCurrentPeriod_F08630CE64040F69D926D27CC98C7F1B" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_mmsi_NetOperatingLossCarryforwardsUsedInCurrentPeriod_F08630CE64040F69D926D27CC98C7F1B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign_74DDF159B8F624E5528AD27CC98C4F39" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign_74DDF159B8F624E5528AD27CC98C4F39" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_UnrecognizedTaxBenefitsGrossIncludingInterestAndPenalties" xlink:label="loc_mmsi_UnrecognizedTaxBenefitsGrossIncludingInterestAndPenalties_B2F9D03C08DAD1E34527D27CC98C6CCA" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_mmsi_UnrecognizedTaxBenefitsGrossIncludingInterestAndPenalties_B2F9D03C08DAD1E34527D27CC98C6CCA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_2BA9A3147338592A6F35D27CC98D6656" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_2BA9A3147338592A6F35D27CC98D6656" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DeferredTaxAssetReductioninValuationAllowanceNoncurrent" xlink:label="loc_mmsi_DeferredTaxAssetReductioninValuationAllowanceNoncurrent_0E6AD352B8736697A765D27CC98D3F13" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_mmsi_DeferredTaxAssetReductioninValuationAllowanceNoncurrent_0E6AD352B8736697A765D27CC98D3F13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_3A572D014A0097D0A14FD27CC98D79BF" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_3A572D014A0097D0A14FD27CC98D79BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_32523C49A82AC1E91934D27CC98D5AED" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_32523C49A82AC1E91934D27CC98D5AED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible" xlink:label="loc_us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible_C1A50D4096FB604D3E0DD27CC98DA97D" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_2813BB7A031B5E24CB58D27CC98CCAA5" xlink:to="loc_us-gaap_DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible_C1A50D4096FB604D3E0DD27CC98DA97D" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/IncomeTaxesSummaryOfIncomeTaxContingenciesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_1EADC1612111FBE523D0D27CC9FD4042" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward" xlink:label="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_EB7685E4ED871CCD183BD27CC9FDB4AD" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_1EADC1612111FBE523D0D27CC9FD4042" xlink:to="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_EB7685E4ED871CCD183BD27CC9FDB4AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_8DE3439D26C376006B15D27CC9FD1724" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_EB7685E4ED871CCD183BD27CC9FDB4AD" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_8DE3439D26C376006B15D27CC9FD1724" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions_D619271B78BE72C49358D27CC9FDC2CB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_EB7685E4ED871CCD183BD27CC9FDB4AD" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions_D619271B78BE72C49358D27CC9FDC2CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions_CA23AFAEAE7E4568D3A0D27CC9FE5B1F" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_EB7685E4ED871CCD183BD27CC9FDB4AD" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions_CA23AFAEAE7E4568D3A0D27CC9FE5B1F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations_99C9070B1BBA34A735EFD27CC9FE4599" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_EB7685E4ED871CCD183BD27CC9FDB4AD" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations_99C9070B1BBA34A735EFD27CC9FE4599" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_B9898D90BAAAE6B7F980D27CC9FE7996" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfUnrecognizedTaxBenefitsExcludingAmountsPertainingToExaminedTaxReturnsRollForward_EB7685E4ED871CCD183BD27CC9FDB4AD" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_B9898D90BAAAE6B7F980D27CC9FE7996" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/IncomeTaxesTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_299001AD386438C18C3DD27CCA32CFC4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock_0C6D772E7C8DFEB22AACD27CCA329530" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_299001AD386438C18C3DD27CCA32CFC4" xlink:to="loc_us-gaap_ScheduleOfIncomeBeforeIncomeTaxDomesticAndForeignTableTextBlock_0C6D772E7C8DFEB22AACD27CCA329530" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_2C51588FE5800C0EA2E8D27CCA327867" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_299001AD386438C18C3DD27CCA32CFC4" xlink:to="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_2C51588FE5800C0EA2E8D27CCA327867" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_D972B20950D168F705BDD27CCA32889E" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_299001AD386438C18C3DD27CCA32CFC4" xlink:to="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_D972B20950D168F705BDD27CCA32889E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_847ED8C2FCC05CAC2B98D27CCA33D1AF" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_299001AD386438C18C3DD27CCA32CFC4" xlink:to="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_847ED8C2FCC05CAC2B98D27CCA33D1AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SummaryOfIncomeTaxContingenciesTextBlock" xlink:label="loc_us-gaap_SummaryOfIncomeTaxContingenciesTextBlock_141F7E32E74438E8AE43D27CCA335578" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_299001AD386438C18C3DD27CCA32CFC4" xlink:to="loc_us-gaap_SummaryOfIncomeTaxContingenciesTextBlock_141F7E32E74438E8AE43D27CCA335578" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/Inventories" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_695687FE24ACB7B07D01D27CCBA1EE89" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="loc_us-gaap_InventoryDisclosureTextBlock_D48DE3656F7618046421D27CCBA1E8BB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_695687FE24ACB7B07D01D27CCBA1EE89" xlink:to="loc_us-gaap_InventoryDisclosureTextBlock_D48DE3656F7618046421D27CCBA1E8BB" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/InventoriesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_642048BEE5069E37AFFBD27CCAFA08AB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_B3005E006DF68C34AC84D27CCAFB1EB0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_642048BEE5069E37AFFBD27CCAFA08AB" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_B3005E006DF68C34AC84D27CCAFB1EB0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_14904AD313F1E382A03DD27CCAFBA232" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_642048BEE5069E37AFFBD27CCAFA08AB" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_14904AD313F1E382A03DD27CCAFBA232" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_9BF8ABA3AD1232819D31D27CCAFB8A19" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_642048BEE5069E37AFFBD27CCAFA08AB" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_9BF8ABA3AD1232819D31D27CCAFB8A19" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_30B839AA0C3092994C89D27CCAFBC13D" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_642048BEE5069E37AFFBD27CCAFA08AB" xlink:to="loc_us-gaap_InventoryNet_30B839AA0C3092994C89D27CCAFBC13D" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/InventoriesTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="loc_us-gaap_InventoryDisclosureAbstract_7A22DEEEEA102979305CD27CC9ADEA1C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_818B374589AE2601A7B9D27CC9ADBC08" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InventoryDisclosureAbstract_7A22DEEEEA102979305CD27CC9ADEA1C" xlink:to="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_818B374589AE2601A7B9D27CC9ADBC08" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPolicies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_8BE3825DE876C6FBA9D78114F8B93B6E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock_24A88C85A7A7189845DF8114F8B9D9F9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_8BE3825DE876C6FBA9D78114F8B93B6E" xlink:to="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock_24A88C85A7A7189845DF8114F8B9D9F9" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_3022DA475900DF215F458114F88E641D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_18481F2730F327E6FAD98114F88E2CE7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_3022DA475900DF215F458114F88E641D" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_18481F2730F327E6FAD98114F88E2CE7" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax" xlink:label="loc_mmsi_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax_DCD2FC6399039F30E5E38114F88E786D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_3022DA475900DF215F458114F88E641D" xlink:to="loc_mmsi_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesTax_DCD2FC6399039F30E5E38114F88E786D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_FC9465F14995AF283C618114F88E204C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_3022DA475900DF215F458114F88E641D" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_FC9465F14995AF283C618114F88E204C" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax" xlink:label="loc_mmsi_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_3F23CDC0EB05842CAFE58114F88E2DD1" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_3022DA475900DF215F458114F88E641D" xlink:to="loc_mmsi_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax_3F23CDC0EB05842CAFE58114F88E2DD1" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesConcentrationOfCreditRiskDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_F73072F4947A95090EFC811EA3938849" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfProductInformationTable" xlink:label="loc_us-gaap_ScheduleOfProductInformationTable_5A01FCD7489B8BD02FE88137D30EEE3B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_F73072F4947A95090EFC811EA3938849" xlink:to="loc_us-gaap_ScheduleOfProductInformationTable_5A01FCD7489B8BD02FE88137D30EEE3B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_C801F98F36C2D29440F781384595E558" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfProductInformationTable_5A01FCD7489B8BD02FE88137D30EEE3B" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_C801F98F36C2D29440F781384595E558" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_1FA30FB761B61B877B46813AE1C106DE" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_C801F98F36C2D29440F781384595E558" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_1FA30FB761B61B877B46813AE1C106DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CustomerConcentrationRiskMember" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_87EB5ABD4D431C159C0A8139984AEC26" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_1FA30FB761B61B877B46813AE1C106DE" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_87EB5ABD4D431C159C0A8139984AEC26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_D143A7D16B41DB7478738138016CCE13" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfProductInformationTable_5A01FCD7489B8BD02FE88137D30EEE3B" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_D143A7D16B41DB7478738138016CCE13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_FB9EF45F77BEC0E32072813B4B4D22D0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_D143A7D16B41DB7478738138016CCE13" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_FB9EF45F77BEC0E32072813B4B4D22D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueNetMember" xlink:label="loc_us-gaap_SalesRevenueNetMember_8461711F65F347256B67813935EA3A27" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_FB9EF45F77BEC0E32072813B4B4D22D0" xlink:to="loc_us-gaap_SalesRevenueNetMember_8461711F65F347256B67813935EA3A27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductInformationLineItems" xlink:label="loc_us-gaap_ProductInformationLineItems_6826D99A6770476CBB4F8137D31DEDB1" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfProductInformationTable_5A01FCD7489B8BD02FE88137D30EEE3B" xlink:to="loc_us-gaap_ProductInformationLineItems_6826D99A6770476CBB4F8137D31DEDB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_B5F87E34335769952A98811EA39398AF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductInformationLineItems_6826D99A6770476CBB4F8137D31DEDB1" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_B5F87E34335769952A98811EA39398AF" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesDeferredCompensationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_8484C513C52A4AE006978114F89B43D8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashSurrenderValueOfLifeInsurance" xlink:label="loc_us-gaap_CashSurrenderValueOfLifeInsurance_B8FA3C60497CB3E5BC458114F89B2557" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_8484C513C52A4AE006978114F89B43D8" xlink:to="loc_us-gaap_CashSurrenderValueOfLifeInsurance_B8FA3C60497CB3E5BC458114F89B2557" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent" xlink:label="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_50DE9DD32DFEB28C552D8114F89B41D0" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_8484C513C52A4AE006978114F89B43D8" xlink:to="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_50DE9DD32DFEB28C552D8114F89B41D0" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_A01FAA99D85EB1B0A9ADD27CCAEEC287" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_E499E8F528BEA6C32977D27CCAEE9FBF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_A01FAA99D85EB1B0A9ADD27CCAEEC287" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_E499E8F528BEA6C32977D27CCAEE9FBF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_99D2ABA13CF9CEF86273D27CCAEE2763" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_E499E8F528BEA6C32977D27CCAEE9FBF" xlink:to="loc_us-gaap_RangeAxis_99D2ABA13CF9CEF86273D27CCAEE2763" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_B12949C5B8FEDF282E78D27CCAEE1A7E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_99D2ABA13CF9CEF86273D27CCAEE2763" xlink:to="loc_us-gaap_RangeMember_B12949C5B8FEDF282E78D27CCAEE1A7E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_461981E37A515E1369B9D27CCAEF800F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_B12949C5B8FEDF282E78D27CCAEE1A7E" xlink:to="loc_us-gaap_MinimumMember_461981E37A515E1369B9D27CCAEF800F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_72AB7C6BAE902698B678D27CCAEF6A49" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_B12949C5B8FEDF282E78D27CCAEE1A7E" xlink:to="loc_us-gaap_MaximumMember_72AB7C6BAE902698B678D27CCAEF6A49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_883AA9B1D16AD641AA3CD27CCAEFE0B2" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_E499E8F528BEA6C32977D27CCAEE9FBF" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_883AA9B1D16AD641AA3CD27CCAEFE0B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_73A0C07D3E55A0B5D643D27CCAEF8715" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_883AA9B1D16AD641AA3CD27CCAEFE0B2" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_73A0C07D3E55A0B5D643D27CCAEF8715" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CustomerListsMember" xlink:label="loc_us-gaap_CustomerListsMember_7B1F9545DF11A627F20ED27CCAEFB2F4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_73A0C07D3E55A0B5D643D27CCAEF8715" xlink:to="loc_us-gaap_CustomerListsMember_7B1F9545DF11A627F20ED27CCAEFB2F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_518F734ED6083C8ED760D27CCAEF58E9" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_73A0C07D3E55A0B5D643D27CCAEF8715" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_518F734ED6083C8ED760D27CCAEF58E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DistributionRightsMember" xlink:label="loc_us-gaap_DistributionRightsMember_FC9674F5D291983B8530D27CCAEF195C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_73A0C07D3E55A0B5D643D27CCAEF8715" xlink:to="loc_us-gaap_DistributionRightsMember_FC9674F5D291983B8530D27CCAEF195C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LicensingAgreementsMember" xlink:label="loc_us-gaap_LicensingAgreementsMember_5D9E82AE67FD6F1F3D88D27CCAEF29BE" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_73A0C07D3E55A0B5D643D27CCAEF8715" xlink:to="loc_us-gaap_LicensingAgreementsMember_5D9E82AE67FD6F1F3D88D27CCAEF29BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NoncompeteAgreementsMember" xlink:label="loc_us-gaap_NoncompeteAgreementsMember_885B4FCD7B9617CB2FA4D27CCAEF2A16" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_73A0C07D3E55A0B5D643D27CCAEF8715" xlink:to="loc_us-gaap_NoncompeteAgreementsMember_885B4FCD7B9617CB2FA4D27CCAEF2A16" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PatentsMember" xlink:label="loc_us-gaap_PatentsMember_FA88FFEEDCB6B1F81FDCD27CCAEF22BE" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_73A0C07D3E55A0B5D643D27CCAEF8715" xlink:to="loc_us-gaap_PatentsMember_FA88FFEEDCB6B1F81FDCD27CCAEF22BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RoyaltyAgreementsMember" xlink:label="loc_us-gaap_RoyaltyAgreementsMember_D111382F057FBB382751D27CCAEF0C47" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_73A0C07D3E55A0B5D643D27CCAEF8715" xlink:to="loc_us-gaap_RoyaltyAgreementsMember_D111382F057FBB382751D27CCAEF0C47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_96A510CD07508E0061B3D27CCAEFECEE" xlink:type="locator" />
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_E499E8F528BEA6C32977D27CCAEE9FBF" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_96A510CD07508E0061B3D27CCAEFECEE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_A11D1B63B07B43B7721FD27CCAEF6D6E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_96A510CD07508E0061B3D27CCAEFECEE" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_A11D1B63B07B43B7721FD27CCAEF6D6E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesOrganizationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_1A8B5378D30BC5C1851C8114F8ADA128" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_039B0CAD98460F034AAA8114F8ADAC6A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_1A8B5378D30BC5C1851C8114F8ADA128" xlink:to="loc_us-gaap_NumberOfOperatingSegments_039B0CAD98460F034AAA8114F8ADAC6A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesOtherAssetsDetails" xlink:type="extended" />
  <link:presentationLink xlink:role="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="loc_us-gaap_UseOfEstimates_B5B33E4617C85EF03F8F8114F8B5A8B7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_UseOfEstimates_B5B33E4617C85EF03F8F8114F8B5A8B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ConsolidationPolicyTextBlock" xlink:label="loc_us-gaap_ConsolidationPolicyTextBlock_F9FCA22ACB8507034D3B8114F8B5EFEB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_ConsolidationPolicyTextBlock_F9FCA22ACB8507034D3B8114F8B5EFEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock_C2E3BCF28188E24EA9B18114F8B5ADBF" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock_C2E3BCF28188E24EA9B18114F8B5ADBF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReceivablesPolicyTextBlock" xlink:label="loc_us-gaap_ReceivablesPolicyTextBlock_D077CC848F45CB2FFDC78114F8B62AD5" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_ReceivablesPolicyTextBlock_D077CC848F45CB2FFDC78114F8B62AD5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InventoryPolicyTextBlock" xlink:label="loc_us-gaap_InventoryPolicyTextBlock_6EF2C829760D2BA7F5CE8114F8B6771B" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_InventoryPolicyTextBlock_6EF2C829760D2BA7F5CE8114F8B6771B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_00B07E2B921EBDB62E6E8114F8B63B2A" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_00B07E2B921EBDB62E6E8114F8B63B2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:label="loc_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_34367DAD6946F28153328114F8B6CCE9" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_34367DAD6946F28153328114F8B6CCE9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_A9A9F73A4A2C8AF51B878114F8B67FC2" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_A9A9F73A4A2C8AF51B878114F8B67FC2" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DeferredCompensationPolicyTextBlockPolicyTextBlock" xlink:label="loc_mmsi_DeferredCompensationPolicyTextBlockPolicyTextBlock_19027BA176888B2BD6E78114F8B62675" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_mmsi_DeferredCompensationPolicyTextBlockPolicyTextBlock_19027BA176888B2BD6E78114F8B62675" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_OtherAssetsPolicyTextBlockPolicyTextBlock" xlink:label="loc_mmsi_OtherAssetsPolicyTextBlockPolicyTextBlock_B44475364BE7D724EE228114F8B6E8A4" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_mmsi_OtherAssetsPolicyTextBlockPolicyTextBlock_B44475364BE7D724EE228114F8B6E8A4" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DeferredCreditsPolicyTextBlock" xlink:label="loc_mmsi_DeferredCreditsPolicyTextBlock_B9208FD767D6A987D8E08114F8B66FA5" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_mmsi_DeferredCreditsPolicyTextBlock_B9208FD767D6A987D8E08114F8B66FA5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="loc_us-gaap_RevenueRecognitionPolicyTextBlock_C2538E200C5641925C868114F8B6EEB2" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_RevenueRecognitionPolicyTextBlock_C2538E200C5641925C868114F8B6EEB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShippingAndHandlingCostPolicyTextBlock" xlink:label="loc_us-gaap_ShippingAndHandlingCostPolicyTextBlock_8F067711A657195FEF978114F8B69369" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_ShippingAndHandlingCostPolicyTextBlock_8F067711A657195FEF978114F8B69369" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CostOfSalesPolicyTextBlock" xlink:label="loc_us-gaap_CostOfSalesPolicyTextBlock_5F781DAF580ED3463BF08114F8B62D05" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_CostOfSalesPolicyTextBlock_5F781DAF580ED3463BF08114F8B62D05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ResearchAndDevelopmentExpensePolicy" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpensePolicy_16739BD560B962241B688114F8B6D61D" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpensePolicy_16739BD560B962241B688114F8B6D61D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="loc_us-gaap_IncomeTaxPolicyTextBlock_59B00403385B7553AE8A8114F8B6FCCB" xlink:type="locator" />
    <link:presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_IncomeTaxPolicyTextBlock_59B00403385B7553AE8A8114F8B6FCCB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="loc_us-gaap_EarningsPerSharePolicyTextBlock_D0D175ADA32BDE1267588114F8B6350B" xlink:type="locator" />
    <link:presentationArc order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_EarningsPerSharePolicyTextBlock_D0D175ADA32BDE1267588114F8B6350B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:label="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy_C253675A358B0EB8D9D28114F8B77B8E" xlink:type="locator" />
    <link:presentationArc order="18" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy_C253675A358B0EB8D9D28114F8B77B8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:label="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_3479B91FED452BD01DD08114F8B7D20C" xlink:type="locator" />
    <link:presentationArc order="19" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_3479B91FED452BD01DD08114F8B7D20C" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ConcentrationOfCreditRiskPolicyTextBlock" xlink:label="loc_mmsi_ConcentrationOfCreditRiskPolicyTextBlock_38EB18B0AE36163D55958114F8B75648" xlink:type="locator" />
    <link:presentationArc order="20" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_mmsi_ConcentrationOfCreditRiskPolicyTextBlock_38EB18B0AE36163D55958114F8B75648" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:label="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_67DC6ADC8C54B08001AB8114F8B7576C" xlink:type="locator" />
    <link:presentationArc order="21" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_67DC6ADC8C54B08001AB8114F8B7576C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativesPolicyTextBlock" xlink:label="loc_us-gaap_DerivativesPolicyTextBlock_3DC81DCC32F26DBF8D678114F8B73177" xlink:type="locator" />
    <link:presentationArc order="22" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_DerivativesPolicyTextBlock_3DC81DCC32F26DBF8D678114F8B73177" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock" xlink:label="loc_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_5E9A2A1C86490B9C871A8114F8B7E763" xlink:type="locator" />
    <link:presentationArc order="23" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_D91AD338D6E3B14B328B8114F8B5C4F4" xlink:to="loc_us-gaap_NewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_5E9A2A1C86490B9C871A8114F8B7E763" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipmentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_C127B352212735309C5D8114F8A0B326" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsHeldForUse" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_C40711952F2DA11CD1DC8114F8A074E8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_C127B352212735309C5D8114F8A0B326" xlink:to="loc_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_C40711952F2DA11CD1DC8114F8A074E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_834783F69D94D6017E358114F8A01230" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_C127B352212735309C5D8114F8A0B326" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_834783F69D94D6017E358114F8A01230" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_C6456F3D5F5F8222368D8114F8A1B764" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_834783F69D94D6017E358114F8A01230" xlink:to="loc_us-gaap_RangeAxis_C6456F3D5F5F8222368D8114F8A1B764" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_EE6CDBE4966A3D2847F88114F8A19E04" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_C6456F3D5F5F8222368D8114F8A1B764" xlink:to="loc_us-gaap_RangeMember_EE6CDBE4966A3D2847F88114F8A19E04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_3D108EA66FA162C676918114F8A202DF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_EE6CDBE4966A3D2847F88114F8A19E04" xlink:to="loc_us-gaap_MinimumMember_3D108EA66FA162C676918114F8A202DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_99EFDD6A7009E2D460F58114F8A25C51" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_EE6CDBE4966A3D2847F88114F8A19E04" xlink:to="loc_us-gaap_MaximumMember_99EFDD6A7009E2D460F58114F8A25C51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D86EBC26C0173A880C978114F8A246A3" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_834783F69D94D6017E358114F8A01230" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D86EBC26C0173A880C978114F8A246A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_48D60F34951FD35E752B8114F8A39C79" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_D86EBC26C0173A880C978114F8A246A3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_48D60F34951FD35E752B8114F8A39C79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BuildingMember" xlink:label="loc_us-gaap_BuildingMember_666E6FD03EAA27EF5FC78114F8A341C0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_48D60F34951FD35E752B8114F8A39C79" xlink:to="loc_us-gaap_BuildingMember_666E6FD03EAA27EF5FC78114F8A341C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquipmentMember" xlink:label="loc_us-gaap_EquipmentMember_A94E8133364836CDBCF08114F8A46C42" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_48D60F34951FD35E752B8114F8A39C79" xlink:to="loc_us-gaap_EquipmentMember_A94E8133364836CDBCF08114F8A46C42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_251E272F7423BC04A9628114F8A4A8A9" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_48D60F34951FD35E752B8114F8A39C79" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_251E272F7423BC04A9628114F8A4A8A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LandImprovementsMember" xlink:label="loc_us-gaap_LandImprovementsMember_29A94108CD850B4237388114F8A4F829" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_48D60F34951FD35E752B8114F8A39C79" xlink:to="loc_us-gaap_LandImprovementsMember_29A94108CD850B4237388114F8A4F829" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_1CCFD2C8C28DE4D819608114F8A43AD7" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_48D60F34951FD35E752B8114F8A39C79" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_1CCFD2C8C28DE4D819608114F8A43AD7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_9AF3FDC5F3D4F12AA47A8114F8A4CC3E" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_834783F69D94D6017E358114F8A01230" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentLineItems_9AF3FDC5F3D4F12AA47A8114F8A4CC3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_130C64C254B9952214468114F8A415CE" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_9AF3FDC5F3D4F12AA47A8114F8A4CC3E" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_130C64C254B9952214468114F8A415CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_0E43A34C835E9BB47E618114F8A442CE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_9AF3FDC5F3D4F12AA47A8114F8A4CC3E" xlink:to="loc_us-gaap_Depreciation_0E43A34C835E9BB47E618114F8A442CE" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesStockBasedCompensationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_035A416B241A0E03DFE98114F8939AA4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_6B5B3B1EAAE3001B643C8114F89310B4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_035A416B241A0E03DFE98114F8939AA4" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_6B5B3B1EAAE3001B643C8114F89310B4" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/OrganizationAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_5C617B78EBC73EE678828114F8B0D3F7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock" xlink:label="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock_A4836C2C34D6C3B216E08114F8B0226B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_5C617B78EBC73EE678828114F8B0D3F7" xlink:to="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock_A4836C2C34D6C3B216E08114F8B0226B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_18F49D4DDA1FDE9DEDDE8114F8B00AEB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_5C617B78EBC73EE678828114F8B0D3F7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_18F49D4DDA1FDE9DEDDE8114F8B00AEB" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/QuarterlyResultsOfOperationsUnaudited" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:label="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_DEDFD59E199E6A0B829FD27CCBB26BCA" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_QuarterlyFinancialInformationTextBlock" xlink:label="loc_us-gaap_QuarterlyFinancialInformationTextBlock_7E14ECDB4B84289888FED27CCBB20693" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_DEDFD59E199E6A0B829FD27CCBB26BCA" xlink:to="loc_us-gaap_QuarterlyFinancialInformationTextBlock_7E14ECDB4B84289888FED27CCBB20693" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/QuarterlyResultsOfOperationsUnauditedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:label="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_5426F27A53305E68C0E1D27CCC0FC8AE" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_us-gaap_SalesRevenueGoodsNet_31E924DD56C4C65D69C2D27CCC1035F4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/netLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_5426F27A53305E68C0E1D27CCC0FC8AE" xlink:to="loc_us-gaap_SalesRevenueGoodsNet_31E924DD56C4C65D69C2D27CCC1035F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_AA41DDF8BBD1D4105707D27CCC10AA07" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_5426F27A53305E68C0E1D27CCC0FC8AE" xlink:to="loc_us-gaap_GrossProfit_AA41DDF8BBD1D4105707D27CCC10AA07" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_66888B17C8258B0646ADD27CCC10380B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_5426F27A53305E68C0E1D27CCC0FC8AE" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_66888B17C8258B0646ADD27CCC10380B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_F4020D4F52800C545188D27CCC117444" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_5426F27A53305E68C0E1D27CCC0FC8AE" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_F4020D4F52800C545188D27CCC117444" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_5F4B6928BF8AEEB286A9D27CCC11F5B9" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_5426F27A53305E68C0E1D27CCC0FC8AE" xlink:to="loc_us-gaap_NetIncomeLoss_5F4B6928BF8AEEB286A9D27CCC11F5B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_A54853DF50FC88B1867AD27CCC11E724" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_5426F27A53305E68C0E1D27CCC0FC8AE" xlink:to="loc_us-gaap_EarningsPerShareBasic_A54853DF50FC88B1867AD27CCC11E724" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_C8F6372AE5ECCF57EC0FD27CCC11B6E4" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_5426F27A53305E68C0E1D27CCC0FC8AE" xlink:to="loc_us-gaap_EarningsPerShareDiluted_C8F6372AE5ECCF57EC0FD27CCC11B6E4" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/QuarterlyResultsOfOperationsUnauditedTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:label="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_27ABE400E6F80F4133CCD27CCB248D31" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_FAC45FCB3A1ED4CF6471D27CCB243851" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_QuarterlyFinancialInformationDisclosureAbstract_27ABE400E6F80F4133CCD27CCB248D31" xlink:to="loc_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_FAC45FCB3A1ED4CF6471D27CCB243851" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebt" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_BCEBBF9ECE6AA56E4DA5D27CCB6F5BA2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_6D99AB8E8B7D439120E6D27CCB6F00E9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_BCEBBF9ECE6AA56E4DA5D27CCB6F5BA2" xlink:to="loc_us-gaap_DebtDisclosureTextBlock_6D99AB8E8B7D439120E6D27CCB6F00E9" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebtFinancialCovenantsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_5C4850FE37DBBA11EEF98105CAFE9010" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_EB4EBFE5ACC5C73DFF9C8105CAFEA37D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_5C4850FE37DBBA11EEF98105CAFE9010" xlink:to="loc_us-gaap_DebtInstrumentTable_EB4EBFE5ACC5C73DFF9C8105CAFEA37D" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DebtCovenantPeriodAxis" xlink:label="loc_mmsi_DebtCovenantPeriodAxis_8C335628818BA674C89E8105CAFEE256" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_EB4EBFE5ACC5C73DFF9C8105CAFEA37D" xlink:to="loc_mmsi_DebtCovenantPeriodAxis_8C335628818BA674C89E8105CAFEE256" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DebtCovenantPeriodDomain" xlink:label="loc_mmsi_DebtCovenantPeriodDomain_69D9F6CF3C1DCF093CAB8105CAFE9F43" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DebtCovenantPeriodAxis_8C335628818BA674C89E8105CAFEE256" xlink:to="loc_mmsi_DebtCovenantPeriodDomain_69D9F6CF3C1DCF093CAB8105CAFE9F43" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ThroughMarch312017Member" xlink:label="loc_mmsi_ThroughMarch312017Member_D7A7D4828E46D6B2A1EC8105CAFEDF11" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DebtCovenantPeriodDomain_69D9F6CF3C1DCF093CAB8105CAFE9F43" xlink:to="loc_mmsi_ThroughMarch312017Member_D7A7D4828E46D6B2A1EC8105CAFEDF11" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_April12017throughJune302017Member" xlink:label="loc_mmsi_April12017throughJune302017Member_E88941A8E07335FBB8C48105CAFED2E6" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DebtCovenantPeriodDomain_69D9F6CF3C1DCF093CAB8105CAFE9F43" xlink:to="loc_mmsi_April12017throughJune302017Member_E88941A8E07335FBB8C48105CAFED2E6" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_July12017throughDecember312017Member" xlink:label="loc_mmsi_July12017throughDecember312017Member_6E182D39A9E753184E438105CAFE055C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DebtCovenantPeriodDomain_69D9F6CF3C1DCF093CAB8105CAFE9F43" xlink:to="loc_mmsi_July12017throughDecember312017Member_6E182D39A9E753184E438105CAFE055C" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_January12018throughMarch312018Member" xlink:label="loc_mmsi_January12018throughMarch312018Member_72BBD0C177788AAF8C298105CAFF5C97" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DebtCovenantPeriodDomain_69D9F6CF3C1DCF093CAB8105CAFE9F43" xlink:to="loc_mmsi_January12018throughMarch312018Member_72BBD0C177788AAF8C298105CAFF5C97" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_April12018andthereafterMember" xlink:label="loc_mmsi_April12018andthereafterMember_7766C0219AD71216E53F8105CAFF0318" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_DebtCovenantPeriodDomain_69D9F6CF3C1DCF093CAB8105CAFE9F43" xlink:to="loc_mmsi_April12018andthereafterMember_7766C0219AD71216E53F8105CAFF0318" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_38B667677225B9A1339E8105CAFF645A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_EB4EBFE5ACC5C73DFF9C8105CAFEA37D" xlink:to="loc_us-gaap_DebtInstrumentAxis_38B667677225B9A1339E8105CAFF645A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_FD3386C83A406A92AB578105CAFF5AC6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentAxis_38B667677225B9A1339E8105CAFF645A" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_FD3386C83A406A92AB578105CAFF5AC6" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CreditAgreementMember" xlink:label="loc_mmsi_CreditAgreementMember_0B69AF56B05F1E16CB4B8105CAFFC2D9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_FD3386C83A406A92AB578105CAFF5AC6" xlink:to="loc_mmsi_CreditAgreementMember_0B69AF56B05F1E16CB4B8105CAFFC2D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_A6B7CF4B5AEE4807F1358105CAFF5B72" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentTable_EB4EBFE5ACC5C73DFF9C8105CAFEA37D" xlink:to="loc_us-gaap_DebtInstrumentLineItems_A6B7CF4B5AEE4807F1358105CAFF5B72" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_LineofCreditFacilityCovenantTermsConsolidatedTotalLeverageRatioMaximum" xlink:label="loc_mmsi_LineofCreditFacilityCovenantTermsConsolidatedTotalLeverageRatioMaximum_916146D5FFFED9249C4C8105CAFF7458" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_A6B7CF4B5AEE4807F1358105CAFF5B72" xlink:to="loc_mmsi_LineofCreditFacilityCovenantTermsConsolidatedTotalLeverageRatioMaximum_916146D5FFFED9249C4C8105CAFF7458" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_LineofCreditFacilityCovenantTermsConsolidatedEbitdaToFixedChargesRatioMinimum1" xlink:label="loc_mmsi_LineofCreditFacilityCovenantTermsConsolidatedEbitdaToFixedChargesRatioMinimum1_7A4F024DCF600B502F9E8105CB0050D0" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_A6B7CF4B5AEE4807F1358105CAFF5B72" xlink:to="loc_mmsi_LineofCreditFacilityCovenantTermsConsolidatedEbitdaToFixedChargesRatioMinimum1_7A4F024DCF600B502F9E8105CB0050D0" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_LineofCreditFacilityCovenantTermsConsolidatedNetIncomeMinimum" xlink:label="loc_mmsi_LineofCreditFacilityCovenantTermsConsolidatedNetIncomeMinimum_BAC0A00224FEA8257D258105CB00ED33" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_A6B7CF4B5AEE4807F1358105CAFF5B72" xlink:to="loc_mmsi_LineofCreditFacilityCovenantTermsConsolidatedNetIncomeMinimum_BAC0A00224FEA8257D258105CB00ED33" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_LineOfCreditFacilityCovenantTermsConsolidatedEbitdaToFixedChargesRatioNumberOfConsecutiveQuarters" xlink:label="loc_mmsi_LineOfCreditFacilityCovenantTermsConsolidatedEbitdaToFixedChargesRatioNumberOfConsecutiveQuarters_580202BCCDE8B3A290838105CB001DD8" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_A6B7CF4B5AEE4807F1358105CAFF5B72" xlink:to="loc_mmsi_LineOfCreditFacilityCovenantTermsConsolidatedEbitdaToFixedChargesRatioNumberOfConsecutiveQuarters_580202BCCDE8B3A290838105CB001DD8" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_LineOfCreditFacilityCovenantTermsFacilityCapitalExpendituresNextTwelveMonthsMaximum" xlink:label="loc_mmsi_LineOfCreditFacilityCovenantTermsFacilityCapitalExpendituresNextTwelveMonthsMaximum_96EC5465BBEA0B1E2AAD8105CB00CFAB" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentLineItems_A6B7CF4B5AEE4807F1358105CAFF5B72" xlink:to="loc_mmsi_LineOfCreditFacilityCovenantTermsFacilityCapitalExpendituresNextTwelveMonthsMaximum_96EC5465BBEA0B1E2AAD8105CB00CFAB" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebtFutureMinimumPaymentsOnLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_1D6389FE4CD59483670E63BC42B55104" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_AF2F84039A326492BCCA63BC42B50506" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_1D6389FE4CD59483670E63BC42B55104" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_AF2F84039A326492BCCA63BC42B50506" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_806294AE31F8EE38C0DD63BC42B523AE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_1D6389FE4CD59483670E63BC42B55104" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_806294AE31F8EE38C0DD63BC42B523AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_D992B9F6B963CB2BB20563BC42B5D85C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_1D6389FE4CD59483670E63BC42B55104" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_D992B9F6B963CB2BB20563BC42B5D85C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_037C7C13BA32D3036F2B63BC42B52D26" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_1D6389FE4CD59483670E63BC42B55104" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_037C7C13BA32D3036F2B63BC42B52D26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_E589DDCCEFD7C190CBDA63BC42B548A2" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_1D6389FE4CD59483670E63BC42B55104" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_E589DDCCEFD7C190CBDA63BC42B548A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_F9DFE256A6CBC3FA279363D06850FE9D" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_1D6389FE4CD59483670E63BC42B55104" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_F9DFE256A6CBC3FA279363D06850FE9D" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_A809101594BBD3AB77B28173C8543C95" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_71BE62A916D9F9E990E58173C85433D8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_A809101594BBD3AB77B28173C8543C95" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_71BE62A916D9F9E990E58173C85433D8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_08794B5B66B65A545C1C8173C855CA49" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_71BE62A916D9F9E990E58173C85433D8" xlink:to="loc_us-gaap_RangeAxis_08794B5B66B65A545C1C8173C855CA49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_BCA6A6298788284615EF8173C8556179" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeAxis_08794B5B66B65A545C1C8173C855CA49" xlink:to="loc_us-gaap_RangeMember_BCA6A6298788284615EF8173C8556179" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_7A6C10E1377A90187B838173C8555563" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_BCA6A6298788284615EF8173C8556179" xlink:to="loc_us-gaap_MinimumMember_7A6C10E1377A90187B838173C8555563" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_1D9D2FF082343B30C49F8173C8566C79" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RangeMember_BCA6A6298788284615EF8173C8556179" xlink:to="loc_us-gaap_MaximumMember_1D9D2FF082343B30C49F8173C8566C79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_370DF1F3C5C7CB5A1D178173C856467A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_71BE62A916D9F9E990E58173C85433D8" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_370DF1F3C5C7CB5A1D178173C856467A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_9B078CA2930852FD83D68173C8568AB6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_370DF1F3C5C7CB5A1D178173C856467A" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_9B078CA2930852FD83D68173C8568AB6" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_InterestRateSwap1Member" xlink:label="loc_mmsi_InterestRateSwap1Member_C21013CFF51962819C8F8173C85641DE" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_9B078CA2930852FD83D68173C8568AB6" xlink:to="loc_mmsi_InterestRateSwap1Member_C21013CFF51962819C8F8173C85641DE" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_InterestRateSwap2Member" xlink:label="loc_mmsi_InterestRateSwap2Member_6173C1A55A3A8983893C8173C856D158" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_9B078CA2930852FD83D68173C8568AB6" xlink:to="loc_mmsi_InterestRateSwap2Member_6173C1A55A3A8983893C8173C856D158" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_7802F76A564FA4956A968173C8569BF3" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_71BE62A916D9F9E990E58173C85433D8" xlink:to="loc_us-gaap_CreditFacilityAxis_7802F76A564FA4956A968173C8569BF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_03732F01DC05C028611F8173C856A3BB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityAxis_7802F76A564FA4956A968173C8569BF3" xlink:to="loc_us-gaap_CreditFacilityDomain_03732F01DC05C028611F8173C856A3BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_008057446D24CFC4725E8173C856B31E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_03732F01DC05C028611F8173C856A3BB" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_008057446D24CFC4725E8173C856B31E" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_TermLoanMember" xlink:label="loc_mmsi_TermLoanMember_48E21895024AE501FCAB8173C857C785" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_03732F01DC05C028611F8173C856A3BB" xlink:to="loc_mmsi_TermLoanMember_48E21895024AE501FCAB8173C857C785" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BridgeLoanMember" xlink:label="loc_us-gaap_BridgeLoanMember_BB6891C38DD2C4BA28998173C8579C83" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_03732F01DC05C028611F8173C856A3BB" xlink:to="loc_us-gaap_BridgeLoanMember_BB6891C38DD2C4BA28998173C8579C83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_DFDCDB8A8404685EE4348173C8579624" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_71BE62A916D9F9E990E58173C85433D8" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_DFDCDB8A8404685EE4348173C8579624" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_26475AC13C9EAF6F74318173C857B940" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_DFDCDB8A8404685EE4348173C8579624" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_26475AC13C9EAF6F74318173C857B940" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_460054F2B4FFB57FE1798173C857B07C" xlink:type="locator" />
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_71BE62A916D9F9E990E58173C85433D8" xlink:to="loc_us-gaap_VariableRateAxis_460054F2B4FFB57FE1798173C857B07C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_B328C036697C456490358173C8574856" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_VariableRateAxis_460054F2B4FFB57FE1798173C857B07C" xlink:to="loc_us-gaap_VariableRateDomain_B328C036697C456490358173C8574856" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_VariableRate1Member" xlink:label="loc_mmsi_VariableRate1Member_B597530539116E65F2798173C8585674" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_VariableRateDomain_B328C036697C456490358173C8574856" xlink:to="loc_mmsi_VariableRate1Member_B597530539116E65F2798173C8585674" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_VariableRate2Member" xlink:label="loc_mmsi_VariableRate2Member_F2674D44FFC27510FF5A8173C8580BDB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_VariableRateDomain_B328C036697C456490358173C8574856" xlink:to="loc_mmsi_VariableRate2Member_F2674D44FFC27510FF5A8173C8580BDB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_9E8141784EE28E31170D8173C85899D9" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_71BE62A916D9F9E990E58173C85433D8" xlink:to="loc_us-gaap_DebtInstrumentAxis_9E8141784EE28E31170D8173C85899D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_23489F286235CAA3B11D8173C8583792" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentAxis_9E8141784EE28E31170D8173C85899D9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_23489F286235CAA3B11D8173C8583792" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CreditAgreementMember" xlink:label="loc_mmsi_CreditAgreementMember_38F6E35A1D20359EB5998173C8598159" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_23489F286235CAA3B11D8173C8583792" xlink:to="loc_mmsi_CreditAgreementMember_38F6E35A1D20359EB5998173C8598159" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_71BE62A916D9F9E990E58173C85433D8" xlink:to="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_C571E8204801B9B39D5B8173C859A21C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_C571E8204801B9B39D5B8173C859A21C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_3693D72580D37825C2E68173C859CB6B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_3693D72580D37825C2E68173C859CB6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_E866DCCBFD98FA3908AB8173C859FB44" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_E866DCCBFD98FA3908AB8173C859FB44" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_DebtInstrumentDebtDefaultIncreaseinInterestRate" xlink:label="loc_mmsi_DebtInstrumentDebtDefaultIncreaseinInterestRate_99C5B8E3AA9CD79056B48173C85911A2" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_mmsi_DebtInstrumentDebtDefaultIncreaseinInterestRate_99C5B8E3AA9CD79056B48173C85911A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_EA8C87E7F975A03A84D68173C85A2B39" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_EA8C87E7F975A03A84D68173C85A2B39" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_LineOfCreditFacilityCovenantTermsConsolidatedEbitdaToFixedChargesRatioNumberOfConsecutiveQuarters" xlink:label="loc_mmsi_LineOfCreditFacilityCovenantTermsConsolidatedEbitdaToFixedChargesRatioNumberOfConsecutiveQuarters_6B45120D5ED9652F4CD88173C85BE08D" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_mmsi_LineOfCreditFacilityCovenantTermsConsolidatedEbitdaToFixedChargesRatioNumberOfConsecutiveQuarters_6B45120D5ED9652F4CD88173C85BE08D" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_LineOfCreditFacilityCovenantTermsFacilityCapitalExpendituresNextTwelveMonthsMaximum" xlink:label="loc_mmsi_LineOfCreditFacilityCovenantTermsFacilityCapitalExpendituresNextTwelveMonthsMaximum_B3A98743EBF3954460878173C85C123E" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_mmsi_LineOfCreditFacilityCovenantTermsFacilityCapitalExpendituresNextTwelveMonthsMaximum_B3A98743EBF3954460878173C85C123E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_437B0490AFA87D0626908173C85CB649" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_437B0490AFA87D0626908173C85CB649" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtPercentageBearingFixedInterestRate" xlink:label="loc_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_064FE07D5C5D5E08F94A8173C85CF8A5" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_us-gaap_LongTermDebtPercentageBearingFixedInterestRate_064FE07D5C5D5E08F94A8173C85CF8A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtPercentageBearingFixedInterestAmount" xlink:label="loc_us-gaap_LongtermDebtPercentageBearingFixedInterestAmount_EA90A071407B7C86E3438173C85C308F" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_us-gaap_LongtermDebtPercentageBearingFixedInterestAmount_EA90A071407B7C86E3438173C85C308F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtPercentageBearingVariableInterestRate" xlink:label="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_E765F1402F00E4EB4ABA8173C85C6E70" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_E765F1402F00E4EB4ABA8173C85C6E70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtPercentageBearingVariableInterestAmount" xlink:label="loc_us-gaap_LongtermDebtPercentageBearingVariableInterestAmount_928F3C16691CCAF0CB228173C85C91C0" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_3F599DD4CB86E12B61C48173C8597E7C" xlink:to="loc_us-gaap_LongtermDebtPercentageBearingVariableInterestAmount_928F3C16691CCAF0CB228173C85C91C0" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebtPrincipalBalancesUnderLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_06870BD199D507AE1FEE8114F82E0C3A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_DEF8BDA1CCBF1E35EF638114F82E8F6B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_06870BD199D507AE1FEE8114F82E0C3A" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_DEF8BDA1CCBF1E35EF638114F82E8F6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_2E701F3265DE030BCFD48114F82E17B6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_DEF8BDA1CCBF1E35EF638114F82E8F6B" xlink:to="loc_us-gaap_CreditFacilityAxis_2E701F3265DE030BCFD48114F82E17B6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_376CDAB4472A2329CB918114F82E50F2" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityAxis_2E701F3265DE030BCFD48114F82E17B6" xlink:to="loc_us-gaap_CreditFacilityDomain_376CDAB4472A2329CB918114F82E50F2" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_TermLoanMember" xlink:label="loc_mmsi_TermLoanMember_F1FA921232E2D8555AF08114F82EADA4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_376CDAB4472A2329CB918114F82E50F2" xlink:to="loc_mmsi_TermLoanMember_F1FA921232E2D8555AF08114F82EADA4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_9B69BABD58AE9E11F6A08114F82EB8B5" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CreditFacilityDomain_376CDAB4472A2329CB918114F82E50F2" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_9B69BABD58AE9E11F6A08114F82EB8B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_795738D97F5D897A8ED48114F82EABAA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_DEF8BDA1CCBF1E35EF638114F82E8F6B" xlink:to="loc_us-gaap_LineOfCreditFacilityLineItems_795738D97F5D897A8ED48114F82EABAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_8F92246ACF0D53C857A88114F82E2E7A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_795738D97F5D897A8ED48114F82EABAA" xlink:to="loc_us-gaap_LongTermDebt_8F92246ACF0D53C857A88114F82E2E7A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_425AF616F8E71F02B4308114F82F3A3D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_795738D97F5D897A8ED48114F82EABAA" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_425AF616F8E71F02B4308114F82F3A3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_B7F3F6D5115EFDE2E1448114F82FDD5E" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_795738D97F5D897A8ED48114F82EABAA" xlink:to="loc_us-gaap_LongTermDebtCurrent_B7F3F6D5115EFDE2E1448114F82FDD5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_BEDC8A3EB0943FCE41078114F82F24F7" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_795738D97F5D897A8ED48114F82EABAA" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_BEDC8A3EB0943FCE41078114F82F24F7" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/RevolvingCreditFacilityAndLongTermDebtTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_DD952CE52F887116C9ED8105CB278751" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:label="loc_us-gaap_ScheduleOfDebtInstrumentsTextBlock_C5529C1701BD48CE59978105CB277765" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_DD952CE52F887116C9ED8105CB278751" xlink:to="loc_us-gaap_ScheduleOfDebtInstrumentsTextBlock_C5529C1701BD48CE59978105CB277765" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ScheduleofLongtermDebtCovenantsTableTableTextBlock" xlink:label="loc_mmsi_ScheduleofLongtermDebtCovenantsTableTableTextBlock_F668C68E33309239EA858146C4725BBE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_DD952CE52F887116C9ED8105CB278751" xlink:to="loc_mmsi_ScheduleofLongtermDebtCovenantsTableTableTextBlock_F668C68E33309239EA858146C4725BBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_8FCFDFAF182EB42E8BBE8105CB27781B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtDisclosureAbstract_DD952CE52F887116C9ED8105CB278751" xlink:to="loc_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_8FCFDFAF182EB42E8BBE8105CB27781B" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/RoyaltyAgreements" xlink:type="extended">
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RoyaltyAgreementsAbstract" xlink:label="loc_mmsi_RoyaltyAgreementsAbstract_1ED8A374E93AFAEA6B03D27CCB99AF40" xlink:type="locator" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RoyaltyAgreementsTextBlock" xlink:label="loc_mmsi_RoyaltyAgreementsTextBlock_B1BC3CD224A1D7C037B9D27CCB99DC23" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_RoyaltyAgreementsAbstract_1ED8A374E93AFAEA6B03D27CCB99AF40" xlink:to="loc_mmsi_RoyaltyAgreementsTextBlock_B1BC3CD224A1D7C037B9D27CCB99DC23" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/RoyaltyAgreementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RoyaltyAgreementsAbstract" xlink:label="loc_mmsi_RoyaltyAgreementsAbstract_54E018EB69827C79BF64D27CCA645D2C" xlink:type="locator" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RoyaltyAgreementsTable" xlink:label="loc_mmsi_RoyaltyAgreementsTable_B816F65084F816170ADDD27CCA6405D5" xlink:type="locator" />
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_RoyaltyAgreementsAbstract_54E018EB69827C79BF64D27CCA645D2C" xlink:to="loc_mmsi_RoyaltyAgreementsTable_B816F65084F816170ADDD27CCA6405D5" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RoyaltyAgreementsAxis" xlink:label="loc_mmsi_RoyaltyAgreementsAxis_12B481AF1F229AD03F37D27CCA6499C6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_RoyaltyAgreementsTable_B816F65084F816170ADDD27CCA6405D5" xlink:to="loc_mmsi_RoyaltyAgreementsAxis_12B481AF1F229AD03F37D27CCA6499C6" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RoyaltyAgreementsDomain" xlink:label="loc_mmsi_RoyaltyAgreementsDomain_385178B9993285A00E0CD27CCA6428F4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_RoyaltyAgreementsAxis_12B481AF1F229AD03F37D27CCA6499C6" xlink:to="loc_mmsi_RoyaltyAgreementsDomain_385178B9993285A00E0CD27CCA6428F4" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_BiosphereAphpRoyaltyMember" xlink:label="loc_mmsi_BiosphereAphpRoyaltyMember_CB39A8E41FB817084B50D27CCA6465A0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_RoyaltyAgreementsDomain_385178B9993285A00E0CD27CCA6428F4" xlink:to="loc_mmsi_BiosphereAphpRoyaltyMember_CB39A8E41FB817084B50D27CCA6465A0" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_RoyaltyAgreementsLineItems" xlink:label="loc_mmsi_RoyaltyAgreementsLineItems_B6C78B142AFBFE4973AFD27CCA64FE7D" xlink:type="locator" />
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_RoyaltyAgreementsTable_B816F65084F816170ADDD27CCA6405D5" xlink:to="loc_mmsi_RoyaltyAgreementsLineItems_B6C78B142AFBFE4973AFD27CCA64FE7D" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CurrentRoyaltyRate" xlink:label="loc_mmsi_CurrentRoyaltyRate_1357BD1C3FC62C2B7B83D27CCA6574E7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_RoyaltyAgreementsLineItems_B6C78B142AFBFE4973AFD27CCA64FE7D" xlink:to="loc_mmsi_CurrentRoyaltyRate_1357BD1C3FC62C2B7B83D27CCA6574E7" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_FutureRoyaltyRate" xlink:label="loc_mmsi_FutureRoyaltyRate_B0335C7D31390D093704D27CCA652F4E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_RoyaltyAgreementsLineItems_B6C78B142AFBFE4973AFD27CCA64FE7D" xlink:to="loc_mmsi_FutureRoyaltyRate_B0335C7D31390D093704D27CCA652F4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RoyaltyExpense" xlink:label="loc_us-gaap_RoyaltyExpense_78D5B500DCC377A78D03D27CCA65A023" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_mmsi_RoyaltyAgreementsLineItems_B6C78B142AFBFE4973AFD27CCA64FE7D" xlink:to="loc_us-gaap_RoyaltyExpense_78D5B500DCC377A78D03D27CCA65A023" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/ScheduleIiValuationAndQualifyingAccounts" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsAbstract" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsAbstract_F4EF0DB6109388AEFC39D27CCB02E9FC" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock" xlink:label="loc_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_41C75E066B65AE063DD3D27CCB024537" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsAbstract_F4EF0DB6109388AEFC39D27CCB02E9FC" xlink:to="loc_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_41C75E066B65AE063DD3D27CCB024537" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/ScheduleIiValuationAndQualifyingAccountsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsAbstract" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsAbstract_BB85E42CCC40A7D83F658AC2EBD30F4C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureTable" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_F7EF2100C29C9EE41D7F8AC2EBD64A9B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsAbstract_BB85E42CCC40A7D83F658AC2EBD30F4C" xlink:to="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_F7EF2100C29C9EE41D7F8AC2EBD64A9B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_64AF05BFBFA47728FD748AC2EBD80498" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_F7EF2100C29C9EE41D7F8AC2EBD64A9B" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_64AF05BFBFA47728FD748AC2EBD80498" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_AC256EE164515C8561F28AC2EBD804A4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_64AF05BFBFA47728FD748AC2EBD80498" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_AC256EE164515C8561F28AC2EBD804A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsMember" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsMember_A005A926E46DADB356BB8AC2EBD86D6C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_AC256EE164515C8561F28AC2EBD804A4" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsMember_A005A926E46DADB356BB8AC2EBD86D6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember" xlink:label="loc_us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_87F080D45B4AF7E550568AC2EBDBD154" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_AC256EE164515C8561F28AC2EBD804A4" xlink:to="loc_us-gaap_ValuationAllowanceOfDeferredTaxAssetsMember_87F080D45B4AF7E550568AC2EBDBD154" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_9A4AB55E1CB6E7A69E768AC2EBDB3D6E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_F7EF2100C29C9EE41D7F8AC2EBD64A9B" xlink:to="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_9A4AB55E1CB6E7A69E768AC2EBDB3D6E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_214F3AB393EB7E277E498AC2EBDBA3A3" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_9A4AB55E1CB6E7A69E768AC2EBDB3D6E" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_214F3AB393EB7E277E498AC2EBDBA3A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_D1069327471B74AD61D48AC2EBDBA6FC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_214F3AB393EB7E277E498AC2EBDBA3A3" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_D1069327471B74AD61D48AC2EBDBA6FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_56FCBB80F5745700E7948AC2EBDDEC79" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_214F3AB393EB7E277E498AC2EBDBA3A3" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_56FCBB80F5745700E7948AC2EBDDEC79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDeductions" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_5115DD2E32FD37FDD0E78AC2EBDDC7F4" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_214F3AB393EB7E277E498AC2EBDBA3A3" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_5115DD2E32FD37FDD0E78AC2EBDDC7F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesAdjustments" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesAdjustments_EF7C0F7C060E959A78B18AC741A92EE7" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_214F3AB393EB7E277E498AC2EBDBA3A3" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesAdjustments_EF7C0F7C060E959A78B18AC741A92EE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_A14AF003149DB46637A18AC2EBE02C5E" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_214F3AB393EB7E277E498AC2EBDBA3A3" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_A14AF003149DB46637A18AC2EBE02C5E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/SegmentReportingAndForeignOperations" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_E0F0E22CD7444BE1CCEBD27CCBC74EF9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_8B03A56D3A20D0F02FBED27CCBCCBC16" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_E0F0E22CD7444BE1CCEBD27CCBC74EF9" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_8B03A56D3A20D0F02FBED27CCBCCBC16" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/SegmentReportingAndForeignOperationsAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_CC8CA7228B5A535B901A806B479069B3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable" xlink:label="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_86AD072E674D37504669806B47908D73" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_CC8CA7228B5A535B901A806B479069B3" xlink:to="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_86AD072E674D37504669806B47908D73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_4BF04B6B89E0BB28EF69806B4791E4C7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_86AD072E674D37504669806B47908D73" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_4BF04B6B89E0BB28EF69806B4791E4C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_B953C75C8DD162C7B607806B4791EA63" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_4BF04B6B89E0BB28EF69806B4791E4C7" xlink:to="loc_us-gaap_SegmentDomain_B953C75C8DD162C7B607806B4791EA63" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CardiovascularSegmentMember" xlink:label="loc_mmsi_CardiovascularSegmentMember_B0239B4896E7B3432AC3806B47915672" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_B953C75C8DD162C7B607806B4791EA63" xlink:to="loc_mmsi_CardiovascularSegmentMember_B0239B4896E7B3432AC3806B47915672" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_EndoscopySegmentMember" xlink:label="loc_mmsi_EndoscopySegmentMember_0B66D07872260EB282B4806B4791CEB2" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_B953C75C8DD162C7B607806B4791EA63" xlink:to="loc_mmsi_EndoscopySegmentMember_0B66D07872260EB282B4806B4791CEB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAssetReconcilingItemLineItems" xlink:label="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_413E024958D2321A02CF806B4792827C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_86AD072E674D37504669806B47908D73" xlink:to="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_413E024958D2321A02CF806B4792827C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_0123EE5EBB124D6BE499806B479294D3" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_413E024958D2321A02CF806B4792827C" xlink:to="loc_us-gaap_Assets_0123EE5EBB124D6BE499806B479294D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_CC192593E6FDC95AC973806B4792AD12" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_413E024958D2321A02CF806B4792827C" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_CC192593E6FDC95AC973806B4792AD12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0F1AB7F799809D306F40806B47937331" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_413E024958D2321A02CF806B4792827C" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0F1AB7F799809D306F40806B47937331" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/SegmentReportingAndForeignOperationsLongLivedAssetsByGeographicAreaDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_311B1A2415BE9739CA94D27CCBFEABF4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_06075471BE4FE9CF7606D27CCBFEB17C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_311B1A2415BE9739CA94D27CCBFEABF4" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_06075471BE4FE9CF7606D27CCBFEB17C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_692FB49674A231C1756BD27CCBFEC298" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_06075471BE4FE9CF7606D27CCBFEB17C" xlink:to="loc_us-gaap_StatementGeographicalAxis_692FB49674A231C1756BD27CCBFEC298" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_77A352AA605361FFA904D27CCBFEDB93" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementGeographicalAxis_692FB49674A231C1756BD27CCBFEC298" xlink:to="loc_us-gaap_SegmentGeographicalDomain_77A352AA605361FFA904D27CCBFEDB93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_US" xlink:label="loc_country_US_D65B518A40DBEEA8C591D27CCBFE8816" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_77A352AA605361FFA904D27CCBFEDB93" xlink:to="loc_country_US_D65B518A40DBEEA8C591D27CCBFE8816" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_IE" xlink:label="loc_country_IE_4FC98C36BF499517183FD27CCBFF6E05" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_77A352AA605361FFA904D27CCBFEDB93" xlink:to="loc_country_IE_4FC98C36BF499517183FD27CCBFF6E05" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_NonUSExcludingIrelandMember" xlink:label="loc_mmsi_NonUSExcludingIrelandMember_EDED00CDD895B600DDA4D27CCBFF5BE0" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_77A352AA605361FFA904D27CCBFEDB93" xlink:to="loc_mmsi_NonUSExcludingIrelandMember_EDED00CDD895B600DDA4D27CCBFF5BE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_D2D54C3775342942866ED27CCBFF55CF" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_06075471BE4FE9CF7606D27CCBFEB17C" xlink:to="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_D2D54C3775342942866ED27CCBFF55CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NoncurrentAssets" xlink:label="loc_us-gaap_NoncurrentAssets_83483EC4A89068F269CED27CCBFFA437" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_D2D54C3775342942866ED27CCBFF55CF" xlink:to="loc_us-gaap_NoncurrentAssets_83483EC4A89068F269CED27CCBFFA437" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/SegmentReportingAndForeignOperationsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_E61305C63C3FDF44B9E2806E1FCB96D2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_0BEE53EB7A4740CF0903806E1FCB5ACA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_E61305C63C3FDF44B9E2806E1FCB96D2" xlink:to="loc_us-gaap_NumberOfOperatingSegments_0BEE53EB7A4740CF0903806E1FCB5ACA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable" xlink:label="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_44D16426F76694AB7986806E1FCB6D92" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_E61305C63C3FDF44B9E2806E1FCB96D2" xlink:to="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_44D16426F76694AB7986806E1FCB6D92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_13BE7235AAB185F42753806E1FCB3B0B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_44D16426F76694AB7986806E1FCB6D92" xlink:to="loc_us-gaap_StatementGeographicalAxis_13BE7235AAB185F42753806E1FCB3B0B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_C0E686A38F3881C23864806E1FCB5228" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementGeographicalAxis_13BE7235AAB185F42753806E1FCB3B0B" xlink:to="loc_us-gaap_SegmentGeographicalDomain_C0E686A38F3881C23864806E1FCB5228" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NonUsMember" xlink:label="loc_us-gaap_NonUsMember_256B7C9D946D661181F1806E1FD14103" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentGeographicalDomain_C0E686A38F3881C23864806E1FCB5228" xlink:to="loc_us-gaap_NonUsMember_256B7C9D946D661181F1806E1FD14103" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_04BB3B22B00B37AD3038806E1FD123EE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_44D16426F76694AB7986806E1FCB6D92" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_04BB3B22B00B37AD3038806E1FD123EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_DA28CE0F21F45ADFFA81806E1FD129FB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_04BB3B22B00B37AD3038806E1FD123EE" xlink:to="loc_us-gaap_SalesRevenueNet_DA28CE0F21F45ADFFA81806E1FD129FB" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ForeignSalesPercentOfTotalSales" xlink:label="loc_mmsi_ForeignSalesPercentOfTotalSales_DCE171A8C195ED7C0CD7806E1FD227E6" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_04BB3B22B00B37AD3038806E1FD123EE" xlink:to="loc_mmsi_ForeignSalesPercentOfTotalSales_DCE171A8C195ED7C0CD7806E1FD227E6" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ForeignSales" xlink:label="loc_mmsi_ForeignSales_B067C96B5470636915DE8073F2DE794E" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_04BB3B22B00B37AD3038806E1FD123EE" xlink:to="loc_mmsi_ForeignSales_B067C96B5470636915DE8073F2DE794E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/SegmentReportingAndForeignOperationsOperatingIncomeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_E8A79E011DB17C95A96380C027135E36" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7FDAD7DF753DA460748380C027132639" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_E8A79E011DB17C95A96380C027135E36" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7FDAD7DF753DA460748380C027132639" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_7C0CDD59CE25AB12AA3880C02713AECF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7FDAD7DF753DA460748380C027132639" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_7C0CDD59CE25AB12AA3880C02713AECF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_387F9BB92963DBE1979980C02713D0C9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7C0CDD59CE25AB12AA3880C02713AECF" xlink:to="loc_us-gaap_SegmentDomain_387F9BB92963DBE1979980C02713D0C9" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CardiovascularSegmentMember" xlink:label="loc_mmsi_CardiovascularSegmentMember_86AADA70354213F9C7D180C027134AB6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_387F9BB92963DBE1979980C02713D0C9" xlink:to="loc_mmsi_CardiovascularSegmentMember_86AADA70354213F9C7D180C027134AB6" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_EndoscopySegmentMember" xlink:label="loc_mmsi_EndoscopySegmentMember_CC1A53019EBF13D605EB80C027142EBE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_387F9BB92963DBE1979980C02713D0C9" xlink:to="loc_mmsi_EndoscopySegmentMember_CC1A53019EBF13D605EB80C027142EBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_F5F002044989FC62734680C0271479F2" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7FDAD7DF753DA460748380C027132639" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_F5F002044989FC62734680C0271479F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_us-gaap_SalesRevenueGoodsNet_FBD82A6A9731CE0FC7F080C027145CBA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_F5F002044989FC62734680C0271479F2" xlink:to="loc_us-gaap_SalesRevenueGoodsNet_FBD82A6A9731CE0FC7F080C027145CBA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_F8B71BFB02D76E5EC2AB80C02714DBF8" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_F5F002044989FC62734680C0271479F2" xlink:to="loc_us-gaap_OperatingExpenses_F8B71BFB02D76E5EC2AB80C02714DBF8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_5B59DB39013BBB6D9F9180C02714E95B" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_F5F002044989FC62734680C0271479F2" xlink:to="loc_us-gaap_OperatingIncomeLoss_5B59DB39013BBB6D9F9180C02714E95B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_43465B4E2E21FF3D46F980C02714BD2A" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_F5F002044989FC62734680C0271479F2" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_43465B4E2E21FF3D46F980C02714BD2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_D29FB4143C7024DA0D0480C0271479A1" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_F5F002044989FC62734680C0271479F2" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_D29FB4143C7024DA0D0480C0271479A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_A88F147A7A8DE49C4B4580C02714559F" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_F5F002044989FC62734680C0271479F2" xlink:to="loc_us-gaap_NetIncomeLoss_A88F147A7A8DE49C4B4580C02714559F" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/SegmentReportingAndForeignOperationsSalesByBusinessSegmentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_3F4B691D805035FC936580C0271C847E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_44FC8DCDD2676EEC7D2A80C0271C7316" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_3F4B691D805035FC936580C0271C847E" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_44FC8DCDD2676EEC7D2A80C0271C7316" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_94186BF06C3FC57D789580C0271C6E9D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_44FC8DCDD2676EEC7D2A80C0271C7316" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_94186BF06C3FC57D789580C0271C6E9D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_CE9E9F5ED17CA306B3EF80C0271C8157" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_94186BF06C3FC57D789580C0271C6E9D" xlink:to="loc_us-gaap_SegmentDomain_CE9E9F5ED17CA306B3EF80C0271C8157" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CardiovascularSegmentMember" xlink:label="loc_mmsi_CardiovascularSegmentMember_7982AF950ED980CE2FFE80C0271C39CC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_CE9E9F5ED17CA306B3EF80C0271C8157" xlink:to="loc_mmsi_CardiovascularSegmentMember_7982AF950ED980CE2FFE80C0271C39CC" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_EndoscopySegmentMember" xlink:label="loc_mmsi_EndoscopySegmentMember_1746828DFED25909F92A80C0271C5504" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentDomain_CE9E9F5ED17CA306B3EF80C0271C8157" xlink:to="loc_mmsi_EndoscopySegmentMember_1746828DFED25909F92A80C0271C5504" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_D079FDBB664FE2B000DA80C0271C29CE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_44FC8DCDD2676EEC7D2A80C0271C7316" xlink:to="loc_us-gaap_ProductOrServiceAxis_D079FDBB664FE2B000DA80C0271C29CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_D6A656D1775CE0AE251880C0271CBF9C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductOrServiceAxis_D079FDBB664FE2B000DA80C0271C29CE" xlink:to="loc_us-gaap_ProductsAndServicesDomain_D6A656D1775CE0AE251880C0271CBF9C" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_StandAloneDevicesMember" xlink:label="loc_mmsi_StandAloneDevicesMember_922F57E4797EB15D909580C0271C5364" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_D6A656D1775CE0AE251880C0271CBF9C" xlink:to="loc_mmsi_StandAloneDevicesMember_922F57E4797EB15D909580C0271C5364" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CustomKitAndProceduresTraysMember" xlink:label="loc_mmsi_CustomKitAndProceduresTraysMember_F9A174A6796CC10CA53880C0271C996F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_D6A656D1775CE0AE251880C0271CBF9C" xlink:to="loc_mmsi_CustomKitAndProceduresTraysMember_F9A174A6796CC10CA53880C0271C996F" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_InflationDevicesMember" xlink:label="loc_mmsi_InflationDevicesMember_9755DECD7390AE7D668D80C0271C09B2" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_D6A656D1775CE0AE251880C0271CBF9C" xlink:to="loc_mmsi_InflationDevicesMember_9755DECD7390AE7D668D80C0271C09B2" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_CathetersMember" xlink:label="loc_mmsi_CathetersMember_0264741FE0A0A13DE44C80C0271D63DA" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_D6A656D1775CE0AE251880C0271CBF9C" xlink:to="loc_mmsi_CathetersMember_0264741FE0A0A13DE44C80C0271D63DA" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_EmbolizationDevicesMember" xlink:label="loc_mmsi_EmbolizationDevicesMember_BF9ECA3FFAD6446E8E0080C0271D32D7" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_D6A656D1775CE0AE251880C0271CBF9C" xlink:to="loc_mmsi_EmbolizationDevicesMember_BF9ECA3FFAD6446E8E0080C0271D32D7" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ElectrophysiologyMember" xlink:label="loc_mmsi_ElectrophysiologyMember_78F510C54B28D28E935480C0271DED10" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_D6A656D1775CE0AE251880C0271CBF9C" xlink:to="loc_mmsi_ElectrophysiologyMember_78F510C54B28D28E935480C0271DED10" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_EndoscopyDevicesMember" xlink:label="loc_mmsi_EndoscopyDevicesMember_6AFB82580AD3EF472C5380C0271D7246" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ProductsAndServicesDomain_D6A656D1775CE0AE251880C0271CBF9C" xlink:to="loc_mmsi_EndoscopyDevicesMember_6AFB82580AD3EF472C5380C0271D7246" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_66CD2A604C287A3ED9FD80C0271D59DA" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_44FC8DCDD2676EEC7D2A80C0271C7316" xlink:to="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_66CD2A604C287A3ED9FD80C0271D59DA" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear" xlink:label="loc_mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear_A6E4DEAF4F94FEE1FAC880C0271D58CA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_66CD2A604C287A3ED9FD80C0271D59DA" xlink:to="loc_mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear_A6E4DEAF4F94FEE1FAC880C0271D58CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_us-gaap_SalesRevenueGoodsNet_D228CE9987230983C62780C0271D9F53" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_66CD2A604C287A3ED9FD80C0271D59DA" xlink:to="loc_us-gaap_SalesRevenueGoodsNet_D228CE9987230983C62780C0271D9F53" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/SegmentReportingAndForeignOperationsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_DE56DA77B69C000249C3D27CCC09DA44" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_41299E7BF66BE6B77781D27CCC093B56" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_DE56DA77B69C000249C3D27CCC09DA44" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTextBlock_41299E7BF66BE6B77781D27CCC093B56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_B2B9F26F7E624A3B60D3D27CCC0AE84B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_DE56DA77B69C000249C3D27CCC09DA44" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_B2B9F26F7E624A3B60D3D27CCC0AE84B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_A8854BDABC98BBE03D7BD27CCC0A825E" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_DE56DA77B69C000249C3D27CCC09DA44" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_A8854BDABC98BBE03D7BD27CCC0A825E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTextBlock" xlink:label="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTextBlock_7D3093BED91F2B028D71D27CCC0AE567" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_DE56DA77B69C000249C3D27CCC09DA44" xlink:to="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTextBlock_7D3093BED91F2B028D71D27CCC0AE567" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/SubsequentEvents" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_FACF5FE200F4AED763ACD27CCAF110A6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="loc_us-gaap_SubsequentEventsTextBlock_68EE9257D0AB4D79E1F1D27CCAF190A9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventsAbstract_FACF5FE200F4AED763ACD27CCAF110A6" xlink:to="loc_us-gaap_SubsequentEventsTextBlock_68EE9257D0AB4D79E1F1D27CCAF190A9" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.merit.com/role/SubsequentEventsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="loc_us-gaap_SubsequentEventsAbstract_C2F1AC0AA7C8F31519C680B5F102DC66" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_CC6AD396182A2562C0E480B5F103652E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventsAbstract_C2F1AC0AA7C8F31519C680B5F102DC66" xlink:to="loc_us-gaap_SubsequentEventTable_CC6AD396182A2562C0E480B5F103652E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CounterpartyNameAxis" xlink:label="loc_us-gaap_CounterpartyNameAxis_9FC1A29ACCA5E839CF0B80B5F103189C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_CC6AD396182A2562C0E480B5F103652E" xlink:to="loc_us-gaap_CounterpartyNameAxis_9FC1A29ACCA5E839CF0B80B5F103189C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RepurchaseAgreementCounterpartyNameDomain" xlink:label="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C017CED2104347C1075880B5F10357EB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CounterpartyNameAxis_9FC1A29ACCA5E839CF0B80B5F103189C" xlink:to="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C017CED2104347C1075880B5F10357EB" xlink:type="arc" />
    <link:loc xlink:href="mmsi-20161231.xsd#mmsi_ArgonMedicalDevicesandCatheterConnectionsInc.Member" xlink:label="loc_mmsi_ArgonMedicalDevicesandCatheterConnectionsInc.Member_B5D2E0986B51401DD10C80C005DAC099" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RepurchaseAgreementCounterpartyNameDomain_C017CED2104347C1075880B5F10357EB" xlink:to="loc_mmsi_ArgonMedicalDevicesandCatheterConnectionsInc.Member_B5D2E0986B51401DD10C80C005DAC099" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_55127A72B1A06EE367D680B5F104E306" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_CC6AD396182A2562C0E480B5F103652E" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_55127A72B1A06EE367D680B5F104E306" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_24E6EA8383332C52365680B5F104825B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_55127A72B1A06EE367D680B5F104E306" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_24E6EA8383332C52365680B5F104825B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_D3AA66384C973890C45280B5F104C4A6" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_24E6EA8383332C52365680B5F104825B" xlink:to="loc_us-gaap_SubsequentEventMember_D3AA66384C973890C45280B5F104C4A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_F77FCECB5FDCF66D6F6980B5F1040331" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventTable_CC6AD396182A2562C0E480B5F103652E" xlink:to="loc_us-gaap_SubsequentEventLineItems_F77FCECB5FDCF66D6F6980B5F1040331" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_7A9A4A50DB23EFA9F92A80BCA16C2F2A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SubsequentEventLineItems_F77FCECB5FDCF66D6F6980B5F1040331" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_7A9A4A50DB23EFA9F92A80BCA16C2F2A" xlink:type="arc" />
  </link:presentationLink>
</link:linkbase>