<?xml version="1.0" encoding="us-ascii"?>
<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2021-02-25T16:52:36.8899981+00:00 -->
<!-- Version            : 5.0.1.571 -->
<!-- Package ID         : 693cddb45b3f46348c1e7d0941d59dfd -->
<!-- Copyright (c) 2021 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="hstm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedUncertainTaxPositionLiability" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedUncertainTaxPositionLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_LesseeOperatingLeaseLiabilityPaymentsDueThereafter" name="LesseeOperatingLeaseLiabilityPaymentsDueThereafter" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_ContractWithCustomerAssetSalesCommissionNoncurrent" name="ContractWithCustomerAssetSalesCommissionNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hstm_DividendForfeituresOnUnvestedEquityAwards" name="DividendForfeituresOnUnvestedEquityAwards" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_NonCashRoyaltyExpense" name="NonCashRoyaltyExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hstm_ChangeInFairValueOfNonMarketableEquityInvestments" name="ChangeInFairValueOfNonMarketableEquityInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hstm_IncreaseDecreaseInDeferredCommissions" name="IncreaseDecreaseInDeferredCommissions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_PaymentsToAcquireNonMarketableEquityInvestments" name="PaymentsToAcquireNonMarketableEquityInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_NonCashAdditionsToPropertyAndEquipment" name="NonCashAdditionsToPropertyAndEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hstm_NoncashAdditionsToNonMarketableEquityMethodInvestment" name="NoncashAdditionsToNonMarketableEquityMethodInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_NonMarketableEquityInvestmentsDisclosureTextBlock" name="NonMarketableEquityInvestmentsDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_RecentlyAdoptedAccountingStandardsPolicyPolicyTextBlock" name="RecentlyAdoptedAccountingStandardsPolicyPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_RevenueFromContractWithCustomerCommissionsPolicyTextBlock" name="RevenueFromContractWithCustomerCommissionsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_NonMarketableEquityInvestmentsPolicyTextBlock" name="NonMarketableEquityInvestmentsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_ShippingAndHandlingCostsPolicyPolicyTextBlock" name="ShippingAndHandlingCostsPolicyPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_PropertyPlantAndEquipmentUsefulLivesTableTextBlock" name="PropertyPlantAndEquipmentUsefulLivesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_NurseGridMember" name="NurseGridMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_ShiftWizardMember" name="ShiftWizardMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_ANSOSStaffSchedulingApplicationMember" name="ANSOSStaffSchedulingApplicationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_ProvidigmLLCMember" name="ProvidigmLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_CredentialMyDocMember" name="CredentialMyDocMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_BusinessAcquisitionStatementOfIncomeFromDateOfAcquisitionTableTextBlock" name="BusinessAcquisitionStatementOfIncomeFromDateOfAcquisitionTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_ReconciliationOfRevenueAndOperatingProfitLossFromSegmentsToConsolidatedTableTextBlock" name="ReconciliationOfRevenueAndOperatingProfitLossFromSegmentsToConsolidatedTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_ScheduleOfShareBasedCompensationAdditionalStockOptionsActivityTableTextBlock" name="ScheduleOfShareBasedCompensationAdditionalStockOptionsActivityTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_ScheduleOfLeaseRelatedAssetsAndLiabilitiesTableTextBlock" name="ScheduleOfLeaseRelatedAssetsAndLiabilitiesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_BusinessAndBasisOfPresentationLineItems" name="BusinessAndBasisOfPresentationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_BusinessAndBasisOfPresentationTable" name="BusinessAndBasisOfPresentationTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_PatientExperienceSolutionsMember" name="PatientExperienceSolutionsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_DeferredCommissionsAmortizationPeriod" name="DeferredCommissionsAmortizationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_AdvanceRoyaltyAmortizationPeriod" name="AdvanceRoyaltyAmortizationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_CapitalizedSoftwareDevelopmentAmortizationPeriod" name="CapitalizedSoftwareDevelopmentAmortizationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_NumberOfPossibleSourcesOfTaxableIncome" name="NumberOfPossibleSourcesOfTaxableIncome" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_NumberOfStockBasedCompensationPlans" name="NumberOfStockBasedCompensationPlans" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_StockRepurchasedAveragePricePerShare" name="StockRepurchasedAveragePricePerShare" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_AmortizedCostAndFairValueDebtSecuritiesAbstract" name="AmortizedCostAndFairValueDebtSecuritiesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_HealthstreamWorkforceSolutionsMember" name="HealthstreamWorkforceSolutionsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_HealthstreamProviderSolutionsMember" name="HealthstreamProviderSolutionsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_SubscriptionServicesMember" name="SubscriptionServicesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_ProfessionalServicesMember" name="ProfessionalServicesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_RevenueRecognitionAndSalesCommissionsAbstract" name="RevenueRecognitionAndSalesCommissionsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_RevenueRecognitionAndSalesCommissionsLineItems" name="RevenueRecognitionAndSalesCommissionsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_RevenueRecognitionAndSalesCommissionsTable" name="RevenueRecognitionAndSalesCommissionsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_DescriptionOfSalesCommissionPlan" name="DescriptionOfSalesCommissionPlan" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_SalesCommissionsAmortizationTermDescription" name="SalesCommissionsAmortizationTermDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_SalesCommissionsAmortizationPeriod" name="SalesCommissionsAmortizationPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_ANSOSMember" name="ANSOSMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_MyClinicalExchangeMember" name="MyClinicalExchangeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_FiniteLivedIntangibleAssetsExpectedAnnualFutureAmortizationExpense" name="FiniteLivedIntangibleAssetsExpectedAnnualFutureAmortizationExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hstm_RecoveryOfWorkingCapitalAdjustmentAndCertainPotentialIndemnificationClaimsMember" name="RecoveryOfWorkingCapitalAdjustmentAndCertainPotentialIndemnificationClaimsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_NonEscrowIncludingPostClosingWorkingCapitalAdjustmentMember" name="NonEscrowIncludingPostClosingWorkingCapitalAdjustmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_PostClosingAdjustmentNetOfCashReceivedMember" name="PostClosingAdjustmentNetOfCashReceivedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_NetTangibleAssetsIncludeDeferredRevenueBookValue" name="NetTangibleAssetsIncludeDeferredRevenueBookValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hstm_WriteDownOfDeferredRevenue" name="WriteDownOfDeferredRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hstm_NonCompeteMember" name="NonCompeteMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_BusinessAcquisitionAccruedPurchasePriceAdjustments" name="BusinessAcquisitionAccruedPurchasePriceAdjustments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_BusinessCombinationIndemnificationAssetsAndLiabilityRelatedToTaxLiabilitiesAmountAsOfAcquisitionDate" name="BusinessCombinationIndemnificationAssetsAndLiabilityRelatedToTaxLiabilitiesAmountAsOfAcquisitionDate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hstm_SegmentReportingRevenueAndOperatingProfitLossReconcilingItemLineItems" name="SegmentReportingRevenueAndOperatingProfitLossReconcilingItemLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_ReconciliationOfRevenueAndOperatingProfitLossFromSegmentsToConsolidatedTable" name="ReconciliationOfRevenueAndOperatingProfitLossFromSegmentsToConsolidatedTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_DepreciationDepletionAndAmortizationIncludingDiscontinuedOperations" name="DepreciationDepletionAndAmortizationIncludingDiscontinuedOperations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hstm_IncomeTaxesDisclosureLineItems" name="IncomeTaxesDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_IncomeTaxesDisclosureTable" name="IncomeTaxesDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_OperatingLossCarryforwardsExpirationYear" name="OperatingLossCarryforwardsExpirationYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_DeferredTaxAssetsTaxLeaseLiability" name="DeferredTaxAssetsTaxLeaseLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hstm_DeferredTaxLiabilitiesRightOfUseAssets" name="DeferredTaxLiabilitiesRightOfUseAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_DeferredTaxLiabilitiesDepreciation" name="DeferredTaxLiabilitiesDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_EmployeeServiceShareBasedCompensationTaxBenefitExpenseFromExerciseOfStockOptions" name="EmployeeServiceShareBasedCompensationTaxBenefitExpenseFromExerciseOfStockOptions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_StockOptionsAndRestrictedStockUnitsMember" name="StockOptionsAndRestrictedStockUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_ProductDevelopmentMember" name="ProductDevelopmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_NumberOfEmployeesAwardedFullyVestedShares" name="NumberOfEmployeesAwardedFullyVestedShares" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="hstm_PaymentsRelatedToTaxWithholdingForShareBasedCompensationForStockAwards" name="PaymentsRelatedToTaxWithholdingForShareBasedCompensationForStockAwards" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_AdditionalStockRedeemedOrCalledDuringPeriodShares" name="AdditionalStockRedeemedOrCalledDuringPeriodShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_OmnibusIncentivePlanMember" name="OmnibusIncentivePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_EmployeesMinimumAgeEligibilityToParticipateInPlan" name="EmployeesMinimumAgeEligibilityToParticipateInPlan" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_MinimumPeriodRequiredToBeEligibleForParticipationInPlan" name="MinimumPeriodRequiredToBeEligibleForParticipationInPlan" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_ScheduleOfSaleOfSubsidiaryAbstract" name="ScheduleOfSaleOfSubsidiaryAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_ThirdAmendmentMember" name="ThirdAmendmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_TruistBankMember" name="TruistBankMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_SwingLineSubfacilityMember" name="SwingLineSubfacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_LetterOfCreditSubfacilityMember" name="LetterOfCreditSubfacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_LineOfCreditFacilityIncreasedFacilitySizeDueToAccordionFeature" name="LineOfCreditFacilityIncreasedFacilitySizeDueToAccordionFeature" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_LineOfCreditFacilityPercentageOfApplicableMarginForBorrowings" name="LineOfCreditFacilityPercentageOfApplicableMarginForBorrowings" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_LineOfCreditFacilityIncreaseBasketForDividend" name="LineOfCreditFacilityIncreaseBasketForDividend" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_LeverageRatio" name="LeverageRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_MinimumLiquidityAmount" name="MinimumLiquidityAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="hstm_MinorityOwnedInvestment" name="MinorityOwnedInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_LiborFloorRate" name="LiborFloorRate" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="hstm_DebtLeverageRatio" name="DebtLeverageRatio" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="hstm_InterestCoverageRatio" name="InterestCoverageRatio" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="hstm_NumberOfOperatingLeasesNotYetCommenced" name="NumberOfOperatingLeasesNotYetCommenced" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="hstm_OperatingLeasesDisclosureLineItems" name="OperatingLeasesDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_OperatingLeasesDisclosureTable" name="OperatingLeasesDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="hstm_GainOnNonMarketableEquityInvestments" name="GainOnNonMarketableEquityInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="hstm_ProcessDataLimitedMember" name="ProcessDataLimitedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
</xsd:schema>
