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        <ExplanationTxt>For the fiscal year ended September 30, 2018, Boston Medical Center Health Plan was included in the Systems financial statements, prior to this fiscal year the Plan had a standalone opinion. As such, BMC Health System, Inc., Boston Medical Center, Boston Medical Center Health Plan, Univer Development Foundation, Inc., East Concord Medical Foundation, Inc., Boston University Affiliated Physicians, Inc., Faculty and the Plans, Boston Accountable Care Organization, BMC Integrated Care Services, Inc., and Boston Medical Center Insurance Co, LTD of Vermont are all nonprofit corporations that have been recognized as tax-exempt pursuant to Section 501(C)(3) of the Internal revenue Code. The shareholders of NAB are nonprofit, tax-exempt corporations. The Health System recognized tax positions when it is more-likely than-not that the positions will be sustainable based on the merits of the position. Management has concluded that there are not material uncertain tax positions that need to be recorded as of September 30, 2018 and 2017. The Health System annually assesses whether it must recognize an unrelated business income tax expense (UBIT). The amounts recognized as UBIT expense were not material to the Health Systems consolidated operations or changes in net assets for the years ended September 30, 2018 and 2017.</ExplanationTxt>
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        <DeferredCompensationFlngOrgAmt>5448</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>20656</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>317147</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Deborah Benjamin</PersonNm>
        <TitleTxt>VP &amp; Deputy General Counsel</TitleTxt>
        <BaseCompensationFilingOrgAmt>205273</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>46229</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>3186</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>9105</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>29307</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>293100</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Darren Bennett</PersonNm>
        <TitleTxt>VP of Advanced Analytics</TitleTxt>
        <BaseCompensationFilingOrgAmt>204956</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>46325</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>1080</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>10860</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>8694</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>271915</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Kathleen Brodie</PersonNm>
        <TitleTxt>VP Provider Audit &amp; SP Inves</TitleTxt>
        <BaseCompensationFilingOrgAmt>203596</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>47618</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>4607</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>7379</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>11482</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>274682</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Suzanne Peterson</PersonNm>
        <TitleTxt>VP of Network Management</TitleTxt>
        <BaseCompensationFilingOrgAmt>206630</BaseCompensationFilingOrgAmt>
        <BonusFilingOrganizationAmount>51550</BonusFilingOrganizationAmount>
        <OtherCompensationFilingOrgAmt>3110</OtherCompensationFilingOrgAmt>
        <DeferredCompensationFlngOrgAmt>11117</DeferredCompensationFlngOrgAmt>
        <NontaxableBenefitsFilingOrgAmt>8592</NontaxableBenefitsFilingOrgAmt>
        <TotalCompensationFilingOrgAmt>280999</TotalCompensationFilingOrgAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 4B</FormAndLineReferenceDesc>
        <ExplanationTxt>Two trustees disclosed on the BMCHP Form 990, Part VII and Schedule J, Part II are compensated by BMC, a related organization, for services provided to BMC. Boston Medical Center provides a supplemental executive retirement plan to certain executives. In addition, certain executives of BMCHP participate in the supplemental retirement plan. Amounts are credited to participants accounts each year. Plan amounts are subject to forfeiture and payment only if certain conditions are met, as outlined in the plan agreement. Boston Medical Center maintains an executive benefit plan which offers participating executives the option of annually allocating benefit dollars to a supplemental retirement/pre-tax savings account. Amounts vest on specified dates based on continued employment but no later than the executives 62nd birthday. Amounts accrued in the plan are reported in Schedule J, Part II, Column C. The following amounts became vested and were paid to the following executives in calendar year 2017: Kathleen Walsh $127,425 David Beck $18,075 BMC provided a supplemental executive retirement plan to Kathleen Walsh, President and CEO as of March 1, 2010. Pursuant to the terms of the agreement, certain amounts were credited to the President and CEOs account in prior years. These amounts are subject to forfeiture and payment will only be made if certain conditions are met, as outlined in the agreement. For calendar year 2017, $47,250 was vested and is reflected in Schedule J, Part II, Column B(iii).</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 6A</FormAndLineReferenceDesc>
        <ExplanationTxt>Boston Medical Center Health Plan paid compensation contingent of the net earnings of the organization based on the achievement of various goals. These compensation amounts are reflected in Schedule J, Part II, Column B(II).</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 7</FormAndLineReferenceDesc>
        <ExplanationTxt>During Calendar Year 2017, BMCHP paid sign-on bonuses, retention bonuses, SHINE Awards and other bonuses to some employees listed where discretion was exercised by management.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>MISSION STATEMENT</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990, PART I, LINE 1 &amp; PART III, LINE 1 THE CORPORATION IS ORGANIZED AND SHALL OPERATE AS A NONPROFIT CORPORATION EXCLUSIVELY FOR THE BENEFIT OF AND TO SUPPORT BOSTON MEDICAL CENTER CORPORATION AND TO PROVIDE ACCESS TO EFFECTIVE, EFFICIENT MEDICAL CARE AMONG LOW INCOME, UNDERSERVED, DISABLED, ELDERLY AND OTHER VULNERABLE RESIDENTS OF THE COMMUNITY. FORM 990, PART I, LINE 7B: THE ORGANIZATION'S UNRELATED BUSINESS TAXABLE INCOME FOR FISCAL YEAR ENDED SEPTEMBER 30, 2018 WAS SOLELY FROM INCOME CREATED UNDER IRC 512(A)(7) RELATED TO QUALIFIED TRANSPORTATION FRINGE BENEFITS. AS SUCH, NO UNRELATED BUSINESS TAXABLE INCOME IS REFLECTED ON FORM 990, PART VIII, STATEMENT OF REVENUE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>DAVID AMENT DAVID BECK JAMES BLUE KATHLEEN WALSH BUSINESS RELATIONSHIP - THE OFFICERS AND TRUSTEES ABOVE ARE ALSO OFFICERS AND/OR TRUSTEES OF BMC HEALTH SYSTEM, INC. DAVID AMENT DAVID BECK KATHLEEN WALSH BUSINESS RELATIONSHIP - THE OFFICERS AND TRUSTEES ABOVE ARE ALSO OFFICERS AND/OR TRUSTEES OF BOSTON MEDICAL CENTER. DAVID BECK IS AN OFFICER AND KATHLEEN WALSH IS A TRUSTEE AT BOSTON UNIVERSITY AFFILIATED PHYSICIANS, INC. AND FACULTY PRACTICE FOUNDATION, INC. DAVID BECK IS AN OFFICER AT EACH FACULTY PRACTICE PLAN CORPORATION THAT EMPLOYS KEITH LEWIS, M.D.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>BMC HEALTH SYSTEM, INC. IS THE SOLE MEMBER OF BMCHP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>CERTAIN ACTIONS INCLUDING, BUT NOT LIMITED TO, THE APPROVAL OF BUDGETS, MERGERS, ACQUISITIONS, AND INDEBTEDNESS ARE SUBJECT TO THE APPROVAL OF THE SOLE MEMBER.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>BOSTON MEDICAL CENTER HEALTH PLAN'S (BMCHP) TAX RETURN IS PREPARED BY KPMG LLP AND REVIEWED BY BMCHP'S INTERNAL MANAGEMENT. FOLLOWING THAT REVIEW, BMCHP'S INTERNAL MANAGEMENT AND KPMG PRESENT THE FORM 990 TO THE AUDIT COMMITTEE FOR REVIEW AND COMMENT. THE COMPLETED FORM 990 IS PROVIDED TO ALL MEMBERS OF THE BOARD OF TRUSTEES PRIOR TO THE FORM BEING FILED WITH THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>CONFLICT OF INTEREST QUESTIONNAIRES FOR THE FISCAL YEAR ENDING SEPTEMBER 30, 2018 WERE DISTRIBUTED BY THE ORGANIZATION'S LEGAL DEPARTMENT. THE CHIEF COMPLIANCE OFFICER QUERIES TRUSTEES AND OFFICERS ON AT LEAST AN ANNUAL BASIS REGARDING RELATIONSHIPS THAT MAY CREATE POTENTIAL CONFLICTS OF INTEREST. THE CHIEF COMPLIANCE OFFICER REVIEWS ALL DISCLOSURES AND DETERMINES WHETHER THERE ARE ACTUAL OR POTENTIAL CONFLICTS OF INTEREST. THE CHIEF COMPLIANCE OFFICER INFORMS THE GENERAL COUNSEL OF ANY ACTUAL OR POTENTIAL CONFLICTS OF INTEREST. THE GENERAL COUNSEL ADVISES THE BOARD OF TRUSTEES AND OFFICERS OF THE CORPORATION ACCORDINGLY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 15A &amp; 15B</FormAndLineReferenceDesc>
        <ExplanationTxt>BOSTON MEDICAL CENTER HEALTH PLAN (BMCHP) RELIED ON BOSTON MEDICAL CENTER (BMC), A RELATED ORGANIZATION OF BMCHP, TO ESTABLISH ITS PRESIDENT/CEO'S COMPENSATION. BMCHP'S PROCESS FOR DETERMINING COMPENSATION OF ITS TOP MANAGEMENT AND KEY EMPLOYEES INCLUDES USING AN INDEPENDENT COMPENSATION CONSULTANT, PERFORMING STANDARD BENCHMARKING, USING PUBLIC DATA AND SALARY SURVEYS FROM SOURCES INCLUDING MERCER AND THE HAY GROUP, BOTH AT THE TIME OF HIRE AND AGAIN WHEN OTHER THAN STANDARD INCREASES ARE CONSIDERED. DATA COLLECTED ARE REVIEWED AND APPROVED BY THE COMPENSATION COMMITTEE CONSISTING OF INDEPENDENT PERSONS AND DELIBERATIONS AND DECISIONS ARE CONTEMPORANEOUSLY SUBSTANTIATED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER THAN AS REQUIRED BY LAW, BOSTON MEDICAL CENTER HEALTH PLAN DOES NOT MAKE DOCUMENTS PUBLICALLY AVAILABLE. HOWEVER, THE RESTATED ARTICLES OF THE ORGANIZATION ARE POSTED ON THE SECRETARY OF THE COMMONWEALTH'S WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>Transafer from Boston Medical Center Insurance Co., LTD of Vermont $10,000,000</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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      <IdRelatedTaxExemptOrgGrp>
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          <AddressLine1Txt>PO Box 530 100 Bank Street</AddressLine1Txt>
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          <ZIPCd>05401</ZIPCd>
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        <EIN>201810549</EIN>
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        <LegalDomicileStateCd>VT</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>BMC</BusinessNameLine1Txt>
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        <ControlledOrganizationInd>true</ControlledOrganizationInd>
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      <IdRelatedTaxExemptOrgGrp>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>BMC INTEGRATED CARE SERVICES INC</BusinessNameLine1Txt>
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          <AddressLine1Txt>ONE BOSTON MEDICAL CENTER PL</AddressLine1Txt>
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        <EIN>043414914</EIN>
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        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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        <PublicCharityStatusTxt>12 A-I</PublicCharityStatusTxt>
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          <BusinessNameLine1Txt>BMC</BusinessNameLine1Txt>
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      <IdRelatedOrgTxblPartnershipGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>BMC NAB BUS TRUST</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>85 CONCORD ST</AddressLine1Txt>
          <CityNm>BOSTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>02118</ZIPCd>
        </USAddress>
        <EIN>266368869</EIN>
        <PrimaryActivitiesTxt>PROPERTY MGMT</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>BMC</BusinessNameLine1Txt>
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        <DisproportionateAllocationsInd>false</DisproportionateAllocationsInd>
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      <IdRelatedOrgTxblCorpTrGrp>
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          <BusinessNameLine1Txt>BMC INSURANCE COMPANY LTD</BusinessNameLine1Txt>
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          <AddressLine1Txt>10 MAIN STREET</AddressLine1Txt>
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          <CountryCd>CJ</CountryCd>
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        <LegalDomicileForeignCountryCd>CJ</LegalDomicileForeignCountryCd>
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          <BusinessNameLine1Txt>NA</BusinessNameLine1Txt>
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        <MethodOfAmountDeterminationTxt>FMV</MethodOfAmountDeterminationTxt>
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        <OtherOrganizationName>
          <BusinessNameLine1Txt>BOSTON MEDICAL CENTER</BusinessNameLine1Txt>
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        <OtherOrganizationName>
          <BusinessNameLine1Txt>BMC INSURANCE CO LTD OF VT</BusinessNameLine1Txt>
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          <BusinessNameLine1Txt>BOSTON MEDICAL CENTER</BusinessNameLine1Txt>
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      </TransactionsRelatedOrgGrp>
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    </IRS990ScheduleR>
  </ReturnData>
</Return>