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      <BuildingsGrp />
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>MERRIMACK VALLEY HEALTH SERVICES, INC. IS A NONPROFIT ORGANIZATION AS DESCRIBED IN SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE (THE "CODE") AND IS EXEMPT FROM FEDERAL INCOME TAXES ON RELATED INCOME PURSUANT TO SECTION 501(A) OF THE CODE. THE ORGANIZATION ANNUALLY EVALUATES ITS TAX STATUS AND TAX POSITIONS TAKEN WITH RESPECT TO ITS OPERATIONS AND FINANCIALS POSITION. UNDER ASC 740, INCOME TAXES, AN ORGANIZATION MUST RECOGNIZE THE FINANCIAL STATEMENT EFFECTS OF A TAX POSITION TAKEN FOR TAX RETURN PURPOSES WHEN IT IS MORE LIKELY THAN NOT THAT THE POSITION WILL NOT BE SUSTAINED UPON EXAMINATION BY A TAXING AUTHORITY. THE ORGANIZATION DOES NOT BELIEVE IT HAS TAKEN ANY MATERIAL UNCERTAIN TAX POSITIONS, AND, ACCORDINGLY, IT HAS NOT RECORDED ANY LIABILITY FOR UNRECOGNIZED TAX BENEFITS.</ExplanationTxt>
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        <PersonNm>DEBORAH J WILSON</PersonNm>
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        <PersonNm>ROBIN HYNDS</PersonNm>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>MICHAEL S TURILLI</PersonNm>
        <TitleTxt>CFO/CORP ASST TREAS (END 5/22)</TitleTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>LISA CRUTCHFIELD</PersonNm>
        <TitleTxt>CORP ASST SEC/CHRO HR</TitleTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 3:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CEO'S COMPENSATION IS ESTABLISHED BY THE FOLLOWING METHODS: (A) COMPENSATION COMMITTEE, (B) INDEPENDENT COMPENSATION CONSULTANT, (C) FORM 990 OF OTHER ORGANIZATIONS (D) WRITTEN EMPLOYMENT CONTRACT, (E) COMPENSATION SURVEY AND (F) APPROVAL BY AN EXECUTIVE COMPENSATION COMMITTEE OF THE BOARD OF TRUSTEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 4A:</FormAndLineReferenceDesc>
        <ExplanationTxt>MICHAEL S. TURILLI, FORMER CFO/CORPORATE ASSISTANT TREASURER OF THE ORGANIZATION UNTIL MAY 2022 RECEIVED A SEVERANCE PAYMENT OF $197,316.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 4B:</FormAndLineReferenceDesc>
        <ExplanationTxt>AS PART OF ITS TOTAL COMPENSATION PACKAGE FOR EXECUTIVE-LEVEL EMPLOYEES, THE PARENT COMPANY OF MERRIMACK VALLEY HEALTH SERVICES, INC., LAWRENCE GENERAL HOSPITAL, OFFERS 403(B), 457(B) AND 457(F) NON-QUALIFIED SUPPLEMENTAL RETIREMENT PLANS. FOR THE 2022 CALENDAR YEAR, LAWRENCE GENERAL HOSPITAL CONTRIBUTED THESE AMOUNTS TO THE FOLLOWING EMPLOYEES LISTED ON FORM 990, SCHEDULE J, PART II: DEBORAH J. WILSON, 403B PLAN ($15,159), 457B PLAN ($20,500), 457F PLAN ($129,501); ROBIN HYNDS, 403B PLAN ($5,481), 457B PLAN ($20,500), 457F PLAN ($17,502); MICHAEL S. TURILLI, 403B PLAN ($0), 457B PLAN ($13,301), 457F PLAN ($0); LISA CRUTCHFIELD, 403B PLAN ($0), 457B PLAN ($20,500), 457F PLAN ($0);</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART II, COLUMN C:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE RETIREMENT AND DEFERRED COMPENSATION NUMBERS CONSIST OF THE FOLLOWING PLANS: 403(B) EMPLOYER PAID MATCH 457(B) SERP PLAN #4 EMPLOYER PAID 457(F) EMPLOYER PAID MATCH</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART II, COLUMN D:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE NONTAXABLE BENEFITS CONSIST OF THE FOLLOWING: HEALTH INSURANCE DENTAL INSURANCE STANDARD INSURANCE - LTD INSURANCE PRINCIPAL/PRINCIPAL FINANCIAL GROUP - LTD INSURANCE THE HARTFORD - LTD INSURANCE NATIONWIDE - LIFE INSURANCE</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="IRS990ScheduleO">
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        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 3:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION HAS DELEGATED CONTROL OF ITS OPERATION TO ITS MANAGEMENT COMPANY, ALLIANCE IMAGING, INC.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 6:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBER IS LAWRENCE GENERAL HOSPITAL, INC.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, LINE 7A:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MEMBER APPOINTS THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B:</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 IS PREPARED AND REVIEWED BY THE ORGANIZATION'S EXTERNAL ACCOUNTANT AND SUBSEQUENTLY REVIEWED BY THE CONTROLLER AND THE ORGANIZATION CFO. ONCE COMPLETE THE FORM AND ALL SCHEDULES ARE MADE AVAILABLE TO THE BOARD OF TRUSTEES FOR REVIEW. THE ORGANIZATION'S CFO AND SENIOR VICE PRESIDENT ARE AVAILABLE TO FACILITATE THE REVIEW AS WELL AS ANSWER ANY QUESTIONS REGARDING THE FORM.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C:</FormAndLineReferenceDesc>
        <ExplanationTxt>ON AN ANNUAL BASIS, THE PARENT COMPANY (LAWRENCE GENERAL HOSPITAL) OF MERRIMACK VALLEY HEALTH SERVICES, INC. DISTRIBUTES A CONFLICT OF INTEREST POLICY TO THE BOARD OF TRUSTEES. THE MEMBERS ARE REQUIRED TO DISCLOSE, IN WRITING, ANY POTENTIAL CONFLICT THAT THEY ARE AWARE OF.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE PARENT COMPANY CEO'S COMPENSATION IS REVIEWED AND APPROVED BY AN EXECUTIVE COMPENSATION COMMITTEE OF THE BOARD OF TRUSTEES. THE COMPENSATION FOR THE CFO AND EXECUTVE VICE PRESIDENT ARE DETERMINED BY THE CEO AND REVIEWED BY AN EXECUTIVE COMPENSATION COMMITTEE OF THE BOARD OF TRUSTEES. INDEPENDENT SURVEYS ARE ALSO PERFORMED TO DETERMINE SALARY REASONABLENESS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 19:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES ALL DOCUMENTS AVAILABLE TO THE GENERAL PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER CHANGES -$ 37</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="IRS990ScheduleR">
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        <DisregardedEntityName>
          <BusinessNameLine1Txt>LAWRENCE GENERAL HOSPITAL</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>1 GENERAL STREET</AddressLine1Txt>
          <CityNm>LAWRENCE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01841</ZIPCd>
        </USAddress>
        <EIN>042103586</EIN>
        <PrimaryActivitiesTxt>HOSPITAL</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>3</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NA</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>LGH CHARITABLE TRUST INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>1 GENERAL STREET</AddressLine1Txt>
          <CityNm>LAWRENCE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01841</ZIPCd>
        </USAddress>
        <EIN>222586814</EIN>
        <PrimaryActivitiesTxt>FUNDRAISING</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>7</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>LGH INC</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>LGH ADMINISTRATIVE SERVICES INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>1 GENERAL STREET</AddressLine1Txt>
          <CityNm>LAWRENCE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01841</ZIPCd>
        </USAddress>
        <EIN>320423203</EIN>
        <PrimaryActivitiesTxt>QALICB</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>12A</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>LGH INC</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>COMMUNITY MEDICAL ASSOCIATES INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>1 GENERAL STREET</AddressLine1Txt>
          <CityNm>LAWRENCE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01841</ZIPCd>
        </USAddress>
        <EIN>272142635</EIN>
        <PrimaryActivitiesTxt>PHYS PRACTICE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(C)(3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>3</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>LGH INC</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedOrgTxblPartnershipGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>MERRIMACK VALLEY IN MOTION LLC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>1 GENERAL STREET</AddressLine1Txt>
          <CityNm>LAWRENCE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01841</ZIPCd>
        </USAddress>
        <EIN>320578008</EIN>
        <PrimaryActivitiesTxt>Mgt Services</PrimaryActivitiesTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NA</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <PredominantIncomeTypeTxt>N/A</PredominantIncomeTypeTxt>
        <ShareOfTotalIncomeAmt>0</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>0</ShareOfEOYAssetsAmt>
        <DisproportionateAllocationsInd>false</DisproportionateAllocationsInd>
        <UBICodeVAmt>0</UBICodeVAmt>
        <OwnershipPct>0.00000</OwnershipPct>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>LGH HEALTH ENTERPRISES INC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>38 PROSPECT STREET</AddressLine1Txt>
          <CityNm>LAWRENCE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01842</ZIPCd>
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        <EIN>042869696</EIN>
        <PrimaryActivitiesTxt>HEALTHCARE MG</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NA</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>C-Corp</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>0</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>0</ShareOfEOYAssetsAmt>
        <OwnershipPct>0.00000</OwnershipPct>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>LGH PHYSICIAN ASSOCIATES PC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>38 PROSPECT STREET</AddressLine1Txt>
          <CityNm>LAWRENCE</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01842</ZIPCd>
        </USAddress>
        <EIN>043174041</EIN>
        <PrimaryActivitiesTxt>PHYSICIAN PRAC.</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NA</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>C-Corp</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>0</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>0</ShareOfEOYAssetsAmt>
        <OwnershipPct>0.00000</OwnershipPct>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>false</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>false</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>false</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>true</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>false</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>false</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>false</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>false</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>false</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>false</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>false</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>false</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>false</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>false</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>true</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>false</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>false</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>false</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>false</TransferFromOtherOrgInd>
    </IRS990ScheduleR>
  </ReturnData>
</Return>