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<!-- Created by Merrill Corporation -->
<!--XBRL document created with Merrill Bridge  6.1.177.0 -->
<!--Based on XBRL 2.1-->
<!--Created on: 5/5/2016 1:12:07 PM-->
<!--Modified on: 5/5/2016 1:12:07 PM-->
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  <xsd:element abstract="true" id="vcyt_MedicareMember" name="MedicareMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vcyt_AetnaMember" name="AetnaMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vcyt_UnitedHealthcareMember" name="UnitedHealthcareMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <element id="vcyt_NumberOfMajorFinancialInstitutionsWithWhichCashAndCashEquivalentsDeposited" name="NumberOfMajorFinancialInstitutionsWithWhichCashAndCashEquivalentsDeposited" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element abstract="true" id="vcyt_AllowanceForDoubtfulAccountsAbstract" name="AllowanceForDoubtfulAccountsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="false" id="vcyt_TestingAndEvaluationServicesExpense" name="TestingAndEvaluationServicesExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <element id="vcyt_DebtInstrumentEndOfTermPaymentAmount" name="DebtInstrumentEndOfTermPaymentAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element abstract="true" id="vcyt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantRollForward" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantRollForward" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <element id="vcyt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageGrantDateFairValue" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element abstract="true" id="vcyt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vcyt_CollaborativeArrangementDisclosureAbstract" name="CollaborativeArrangementDisclosureAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vcyt_GenzymeCorporationMember" name="GenzymeCorporationMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="vcyt_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="false" id="vcyt_CollaborativeArrangementCoPromotionExpenses" name="CollaborativeArrangementCoPromotionExpenses" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration" />
  <element id="vcyt_CollaborativeArrangementOutstandingObligation" name="CollaborativeArrangementOutstandingObligation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_OtherIncomeRentReimbursement" name="OtherIncomeRentReimbursement" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentEndOfTermPaymentInterestAmount" name="DebtInstrumentEndOfTermPaymentInterestAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_CollaborativeArrangementCoPromotionFeesPercentageOfCashReceiptsRemainingPeriods" name="CollaborativeArrangementCoPromotionFeesPercentageOfCashReceiptsRemainingPeriods" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_CollaborativeArrangementCoPromotionFeesPercentageOfCashReceipts" name="CollaborativeArrangementCoPromotionFeesPercentageOfCashReceipts" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_TermLoanTrancheOneMember" name="TermLoanTrancheOneMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_TermLoanTrancheTwoMember" name="TermLoanTrancheTwoMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_TermLoanTrancheThreeMember" name="TermLoanTrancheThreeMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_NumberOfTranches" name="NumberOfTranches" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_TermLoanMember" name="TermLoanMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_TermLoanDue2017Member" name="TermLoanDue2017Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentPrepaymentPremium" name="DebtInstrumentPrepaymentPremium" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentThirdPartyFeeAmountPaid" name="DebtInstrumentThirdPartyFeeAmountPaid" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_PaymentOfEndOfTermObligation" name="PaymentOfEndOfTermObligation" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_NumberOfSuppliersWithPurchaseObligations" name="NumberOfSuppliersWithPurchaseObligations" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_CollaborativeArrangementCopromotionAfirmaThyroidDiagnosticSolutionMember" name="CollaborativeArrangementCopromotionAfirmaThyroidDiagnosticSolutionMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_CollaborativeArrangementCopromotionAfirmaGecMember" name="CollaborativeArrangementCopromotionAfirmaGecMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_AgreementTermsNonRenewalNoticePeriod" name="AgreementTermsNonRenewalNoticePeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_CollaborativeArrangementCoPromotionFeesPercentageOfNetRevenue" name="CollaborativeArrangementCoPromotionFeesPercentageOfNetRevenue" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_CollaborativeArrangementTerm" name="CollaborativeArrangementTerm" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_LaboratoryFacilitiesAustinTexasMember" name="LaboratoryFacilitiesAustinTexasMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_ConcentrationRiskAbstract" name="ConcentrationRiskAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_RevenueRecognizedOnAccrualBasis" name="RevenueRecognizedOnAccrualBasis" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_RevenueRecognizedReceivedInCash" name="RevenueRecognizedReceivedInCash" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_EmployeeStockOptionExcludingBonusCompensationMember" name="EmployeeStockOptionExcludingBonusCompensationMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_NonEmployeeStockOptionMember" name="NonEmployeeStockOptionMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_LesseeLeasingArrangementsOperatingLeasesSpaceLeased" name="LesseeLeasingArrangementsOperatingLeasesSpaceLeased" nillable="true" type="num:areaItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_CignaMember" name="CignaMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_HeadquartersAndLaboratoryFacilitiesSouthSanFranciscoLeaseTwoMember" name="HeadquartersAndLaboratoryFacilitiesSouthSanFranciscoLeaseTwoMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_SalesRevenueGrossMember" name="SalesRevenueGrossMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_CommonStockAbstract" name="CommonStockAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_ScheduleOfRevenueRecognitionCashAndAccrualBasisTableTextBlock" name="ScheduleOfRevenueRecognitionCashAndAccrualBasisTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_LeaseholdImprovementsEstimateExcludingTenantAllowance" name="LeaseholdImprovementsEstimateExcludingTenantAllowance" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DeferredStockOfferingCosts" name="DeferredStockOfferingCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_VisiumMember" name="VisiumMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_UnamortizedUpFrontCoPromotionFee" name="UnamortizedUpFrontCoPromotionFee" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_InitialTermLoanMember" name="InitialTermLoanMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_SecondTermLoanMember" name="SecondTermLoanMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_NumberOfTermLoans" name="NumberOfTermLoans" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentPenaltyPercentageOnPrepaymentPeriodOne" name="DebtInstrumentPenaltyPercentageOnPrepaymentPeriodOne" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentPenaltyPercentageOnPrepaymentPeriodTwo" name="DebtInstrumentPenaltyPercentageOnPrepaymentPeriodTwo" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentPenaltyPercentageOnPrepaymentPeriodThree" name="DebtInstrumentPenaltyPercentageOnPrepaymentPeriodThree" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentPenaltyPercentageOnPrepaymentPeriodFour" name="DebtInstrumentPenaltyPercentageOnPrepaymentPeriodFour" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentPenaltyPercentageOnPrepaymentPeriodFive" name="DebtInstrumentPenaltyPercentageOnPrepaymentPeriodFive" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentInterestPaidInKindPercentage" name="DebtInstrumentInterestPaidInKindPercentage" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentPrepaymentAmountExcessMultiple" name="DebtInstrumentPrepaymentAmountExcessMultiple" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentPeriodForWhichRightsEquityFinancings" name="DebtInstrumentPeriodForWhichRightsEquityFinancings" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentFutureEquityFinancingsAmount" name="DebtInstrumentFutureEquityFinancingsAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_PrepaymentPenalty" name="PrepaymentPenalty" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_RestrictedCashCorporateCreditCardsPledge" name="RestrictedCashCorporateCreditCardsPledge" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_CapitalExpendituresIncurredButNotYetPaidNet" name="CapitalExpendituresIncurredButNotYetPaidNet" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_TermOfDebtWithEqualQuarterlyInstallments" name="TermOfDebtWithEqualQuarterlyInstallments" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentFixedRatePercentagePaidInCash" name="DebtInstrumentFixedRatePercentagePaidInCash" nillable="true" type="xbrli:pureItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_DebtInstrumentMinimumPrepaymentAllowed" name="DebtInstrumentMinimumPrepaymentAllowed" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod1" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod1" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="vcyt_HeadquartersAndLaboratoryFacilitySouthSanFranciscoMember" name="HeadquartersAndLaboratoryFacilitySouthSanFranciscoMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
</xsd:schema>
