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        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>BOSTON ACCOUNTABLE CARE ORGANIZATION, INC. IS INCLUDED IN THE CONSOLIDATED FINANCIAL STATEMENTS OF BMC HEALTH SYSTEM (BMCHS). THESE STATEMENTS INCLUDE THE FOLLOWING LANGUAGE REGARDING LIABILITY FOR UNCERTAIN TAX POSITIONS WITHIN THE INCOME TAXES FOOTNOTE. BMCHS RECOGNIZES INCOME TAX POSITIONS WHEN IT IS MORE LIKELY THAN NOT THAT THE POSITION WILL BE SUSTAINABLE BASED ON THE MERITS OF THE POSITION. MANAGEMENT HAS CONCLUDED THAT THERE ARE NO MATERIAL UNCERTAIN TAX POSITIONS THAT NEED TO BE RECORDED AS OF SEPTEMBER 30, 2024 AND 2023. BMCHS ANNUALLY ASSESSES WHETHER IT MUST RECOGNIZE UBIT EXPENSE. THE AMOUNTS RECOGNIZED AS UBIT EXPENSE WERE NOT MATERIAL TO BMCHS'S CONSOLIDATED OPERATIONS OR CHANGES IN NET ASSETS FOR THE YEARS ENDED SEPTEMBER 30, 2024 AND 2023.</ExplanationTxt>
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        <ExplanationTxt>DAVID BECK ALASTAIR BELL MICHELLE NADOW SANDRA COTTERELL RAVIN DAVIDOFF TERRI NEWSOM CYNTHIA SIERRA BUSINESS RELATIONSHIP- THE OFFICERS OR DIRECTORS ABOVE ARE ALSO EMPLOYEES, OFFICERS OR TRUSTEES OF BOSTON MEDICAL CENTER CORPORATION. DAVID BECK ALASTAIR BELL WILLIAM CREEVY DAVID HENDERSON BUSINESS RELATIONSHIP - THE OFFICERS OR DIRECTORS ABOVE ARE ALSO EMPLOYEES, OFFICERS OR TRUSTEES OF THE FACULTY PRACTICE PLANS.</ExplanationTxt>
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      <SupplementalInformationDetail>
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        <ExplanationTxt>(A) EACH COMMUNITY HEALTH CENTER PARTICIPATING IN THE CORPORATION THAT PARTICIPATES IN THE MASSHEALTH ACO APPOINTS ONE DIRECTOR; (B) BOSTON MEDICAL CENTER APPOINTS FOUR DIRECTORS; (C) EACH NON-COMMUNITY HEALTH CENTER ENTITY PARTICIPATING IN THE CORPORATION THAT PARTICIPATES IN THE MASSHEALTH ACO APPOINTS ONE DIRECTOR (EXCEPT THAT THE BOSTON UNIVERSITY MEDICAL GROUP APPOINTS FOUR DIRECTORS TO REPRESENT ITS FACULTY PRACTICE PLAN CORPORATION PARTICIPANTS); AND (D) THE CORPORATION'S PATIENT ADVISORY COMMITTEE APPOINTS ONE DIRECTOR WHO IS A CONSUMER REPRESENTATIVE.</ExplanationTxt>
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        <ExplanationTxt>BACO'S FORM 990 IS PREPARED BY KPMG AND REVIEWED BY BMC HEALTH SYSTEM INC.'S INTERNAL MANAGEMENT. FOLLOWING THAT REVIEW, BMC HEALTH SYSTEM INC.'S INTERNAL MANAGEMENT AND KPMG PRESENT THE FORM 990 TO THE BMC HEALTH SYSTEM INC.'S AUDIT AND COMPLIANCE COMMITTEE FOR REVIEW AND COMMENT. THE COMPLETED FORM 990 IS PROVIDED TO ALL MEMBERS OF THE BACO BOARD OF DIRECTORS PRIOR TO THE FORM BEING FILED WITH THE IRS.</ExplanationTxt>
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        <ExplanationTxt>CONFLICT OF INTEREST QUESTIONNAIRES FOR THE FISCAL YEAR ENDING SEPTEMBER 30, 2024 WERE DISTRIBUTED BY BMC HEALTH SYSTEM INC.'S, AN AFFILIATED ORGANIZATION, CORPORATE COMPLIANCE DEPARTMENT. THE CHIEF COMPLIANCE OFFICER OF BMC HEALTH SYSTEM INC. OR THE CHIEF COMPLIANCE OFFICER'S DESIGNEE QUERIES TRUSTEES, OFFICERS AND DIRECTORS ON AT LEAST AN ANNUAL BASIS REGARDING RELATIONSHIPS THAT MAY CREATE POTENTIAL CONFLICTS OF INTEREST. THE CHIEF COMPLIANCE OFFICER OR THE CHIEF COMPLIANCE OFFICER'S DESIGNEE REVIEWS ALL DISCLOSURES AND DETERMINES WHETHER THERE ARE ACTUAL OR POTENTIAL CONFLICTS OF INTEREST. THE CHIEF COMPLIANCE OFFICER OR THE CHIEF COMPLIANCE OFFICER'S DESIGNEE INFORMS THE CHIEF LEGAL COUNSEL OF ANY ACTUAL OR POTENTIAL CONFLICTS OF INTEREST. THE CHIEF LEGAL COUNSEL ADVISES THE BOARD OF DIRECTORS AND OFFICERS OF THE CORPORATION ACCORDINGLY. FORM 990, PART VI, LINE 14 THE ORGANIZATION DOES NOT HAVE A RECORD RETENTION POLICY BUT HAS RECORD RETENTION REQUIREMENTS INCLUDED WITHIN ITS CONTRACTS. BOSTON ACCOUNTABLE CARE ORGANIZATION, INC. FOLLOWS THE RECORD RETENTION POLICY OF BOSTON MEDICAL CENTER.</ExplanationTxt>
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        <ExplanationTxt>BACO DOES NOT MAKE ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, OR FINANCIAL STATEMENTS PUBLICLY AVAILABLE. HOWEVER, THE ARTICLES OF THE ORGANIZATION ARE AVAILABLE ON THE SECRETARY OF THE COMMONWEALTH'S WEBSITE.</ExplanationTxt>
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      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>1</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>1</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
    </IRS990ScheduleR>
  </ReturnData>
</Return>