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        <PersonNm>William Robertson</PersonNm>
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        <PersonNm>Catherine J Pietrzak</PersonNm>
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        <PersonNm>Eric D Berger</PersonNm>
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        <PersonNm>Harold E Lawson Jr</PersonNm>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>Youth Services</ExplanationTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Timothy O'Connor</PersonNm>
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        <PersonNm>Arthur McLeod</PersonNm>
        <TitleTxt>VP FIN BEHAV HEALT THRU 4/5/18</TitleTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>David G Spackman JD</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Kevin Norton</PersonNm>
        <TitleTxt>OFFICER/PRES/CEO thru 10/31/17</TitleTxt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Howard R Grant JD MD</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ELIZABETH P CONRAD</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>CANH PHUONG VU MD</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SANGITA K MALLICK MD</PersonNm>
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        <OtherCompensationFilingOrgAmt>18000</OtherCompensationFilingOrgAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>PRABAKAR THYAGARAJAN MD</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>URROOJ REHMAN MD</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>IRINA GURYANOVA MD</PersonNm>
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        <PersonNm>William Robertson</PersonNm>
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        <PersonNm>Mary Anna Sullivan MD</PersonNm>
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        <PersonNm>Hilary C Jacobs</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Catherine J Pietrzak</PersonNm>
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        <PersonNm>Eric D Berger</PersonNm>
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      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Harold E Lawson Jr</PersonNm>
        <TitleTxt>SVP Chief Revenue Officer Fina</TitleTxt>
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        <NontaxableBenefitsRltdOrgsAmt>41249</NontaxableBenefitsRltdOrgsAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>INDEPENDENT MEMBERS OF THE LAHEY HEALTH SYSTEM, INC. ("LHS") BOARD OF TRUSTEES COMPRISE THE COMPENSATION COMMITTEE. THE COMMITTEE SETS THE COMPENSATION AND BENEFITS FOR THE CEO. THE COMMITTEE SEEKS THE ADVICE OF EXTERNAL COMPENSATION CONSULTANTS. COMPARABILITY DATA IS PROVIDED, ANALYZED AND DOCUMENTED BY THE EXTERNAL CONSULTANTS. LHS AND ITS RELATED ORGANIZATIONS' SENIOR VP AND CHIEF HUMAN RESOURCES OFFICER PROVIDES THE COMMITTEE WITH ANY REQUESTED INFORMATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 4a</FormAndLineReferenceDesc>
        <ExplanationTxt>LHS and its related organizations have employment agreements that contain severance, transition and separatoin (or a combination therof) payment provisions. The following individuals received such payments: Mary Anna Sullivan, CMO Behvaioral Health $106,249</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 4b</FormAndLineReferenceDesc>
        <ExplanationTxt>As required by this Form 990, Schedule J, Compensation Information, the compensation detail included in Northeast Behavioral Health Corporation (NBH) Form 990 for the fiscal year ended September 30, 2018 is calendar year 2017 detail. During the 2017 calendar year, Lahey Health System, Inc. and related organizations were participating employers in the Lahey Clinic 457(f) Non-Qualified Contribution Plan and the Lahey Clinic 457(b) retirement Savings Plan. Pursuant to these plans, eligible employees received certain retirement benefits and/or could defer part of their compensation. Under the definitions to this Form 990, these plans are considered supplemental non-qualified retirement plans. Amounts deferred by participants or received by participants and related to these plans are included in Form 990 Schedule J, Part II, Column B(iii), Other Reportable Compensation and/or Form 990, Schedule J, Part II, Column C, Deferred Compensation in accordance with the instructions to this Form 990. Lahey Clinic 457(f) Non-Qualified Defined Contribution Plan For the period covered by this filing Mr. Timothy OConnor served as Executive Vice President, Chief Financial Officer, and Treasurer of the entities listed below and during the 2017 calendar year he received a $128,000 employer contribution to his 457f plan. This amount has been reported in Form 990, Schedule J, Part II, Column C, Deferred Compensation in accordance with the instructions to this Form 990. As of December 31, 2017, that amount was unvested. - Lahey Health System, Inc. - Lahey Clinic Foundation, Inc. - Lahey Clinic Hospital, Inc. - Lahey Clinic, Inc. - Lahey Health Shared Services, Inc. - Lahey Physician Community Organization I, Inc. - Northeast Hospital Corporation - Northeast Medical Practice, Inc. - Northeast Health System, Inc. - Northeast Senior Health Corporation - Northeast Professional Registry of Nurses, Inc. - Northeast Behavioral Health Corporation - CAB Health and Recovery Services, Inc. - Health and Education Housing Services, Inc. - Seacoast Nursing and Rehabilitation Center, Inc. - Addison Gilbert Society, Inc. - Winchester Healthcare Management, Inc. - Winchester Hospital - Winchester Hospital Foundation, Inc. For the period covered by this filing, Dr. Howard Grant served as President, Chief Executive Officer and Trustee (Ex-Officio) for the entities listed below. Other Reportable Compensation for Dr. Grant includes $1,570,457 related to a 457f benefit. This amount represents a retirement benefit that was earned and accrued, although not vested, over a six year period. The benefit contained a cliff vesting provision which was achieved in 2017. As required by Form 990, employer contributions for prior reporting periods were reported as deferred compensation in each previous year as accrued, even though when reported as deferred compensation the amounts were not vested. Those amounts are reported again in this filing as Other Reportable Compensation as required. - Lahey Health System, Inc. - Lahey Clinic Foundation, Inc. - Lahey Clinic Hospital, Inc. - Lahey Clinic, Inc. - Lahey Health Shared Services, Inc. - Lahey Physician Community Organization I, Inc. - Northeast Hospital Corporation - Northeast Medical Practice, Inc. - Northeast Health System, Inc. - Northeast Senior Health Corporation - Northeast Professional Registry of Nurses, Inc. - Northeast Behavioral Health Corporation - CAB Health and Recovery Services, Inc. - Health and Education Housing Services, Inc. - Seacoast Nursing and Rehabilitation Center, Inc. - Addison Gilbert Society, Inc. - Winchester Healthcare Management, Inc. - Winchester Hospital - Winchester Hospital Foundation, Inc. Lahey Clinic 457(b) Retirement Savings Plan: As noted above, Lahey Health System, Inc. and related organizations were participating employers in the Lahey Clinic 457(b) Retirement Savings Plan. During the period covered by this filing, eligible employees were entitled to defer a portion of their income pursuant to this plan. This plan is completely employee funded. Employees listed in this Form 990 Part VII and Schedule J and who participated in this plan during the 2017 calendar year are listed below with the amounts deferred. In accordance with the instructions to this Form 990, these amounts have been included in Other Reportable Income for each employee listed here. Dr. Howard Grant, see above for titles and responsible legal entities; Amount deferred $18,000 Dr. Mary Anna Sullivan, Trustee, Chief Medical Officer Behavioral Health and Physician; Amount deferred $18,000</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 7</FormAndLineReferenceDesc>
        <ExplanationTxt>The non-fixed payment bonuses reported in Schedule J, Part II, column (b)(ii) are determined by THE compensation committee, which includes Trustees. In a subjective manner, the committee takes into account the achievements of both the organization and the individual to determine the appropriate amount of such bonuses, which include, but not limited to, the organization meeting its corporate goalS; FINANCIAL PERFORMANCE MEASURES AND QUALITY MEASURES (such as patient satisfaction and quality of CARE).</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part II</FormAndLineReferenceDesc>
        <ExplanationTxt>LHS AND ITS RELATED ORGANIZATIONS DO NOT COMPENSATE ANY TRUSTEE OR OFFICER IN THEIR CAPACITY AS TRUSTEE OR OFFICER. ALL COMPENSATION PAID IS FOR WORK PERFORMED IN THEIR CAPACITY OTHER THAN TRUSTEE OR OFFICER, WHICH IS LISTED ON FORM 990, PART VII, DIRECTLY FOLLOWING THE TITLE OF TRUSTEE AND/OR OFFICER.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="IRS990ScheduleO">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IV, LINE 4</FormAndLineReferenceDesc>
        <ExplanationTxt>LAHEY HEALTH SYSTEM, INC. IS IN CONTACT WITH FEDERAL AND STATE LEGISLATORS REGARDING HEALTH CARE REFORM ISSUES THAT WOULD POTENTIALLY HAVE AN IMPACT ON THE ORGANIZATION AND ITS RELATED ORGANIZATIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IV, LINE 11(F) AND SCHEDULE D, PART X, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S FINANCIAL STATEMENTS DID NOT REPORT A LIABILITY FOR UNCERTAIN TAX POSITIONS UNDER FIN 48.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6, 7A, &amp; 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>LAHEY HEALTH SYSTEM IS THE SOLE CORPORATE MEMBER OF NORTHEAST BEHAVIORAL HEALTH CORPORATION. THE REPORTING ORGANIZATION'S MEMBER HAS, WITH RESPECT TO THE REPORTING ORGANIZATION, THE RIGHT TO EXERCISE ALL POWERS CONFERRED ON MEMBERS OF THE NON-PROFIT CORPORATIONS UNDER MASSACHUSETTS GENERAL LAWS CHAPTER 180, INCLUDING, WITHOUT LIMITATION, POWERS WITH RESPECT TO THE FOLLOWING: (A) APPOINTMENT AND REMOVAL OF MEMBERS OF BOARD OF TRUSTEE; (B) AMENDMENT OF THE ARTICLES OF ORGANIZATION; (C) AMENDMENT OF THE BY-LAWS; (D) THE SALE, LEASE, EXCHANGE OR OTHER DISPOSITION OF ALL OR SUBSTANTIALLY ALL OF THE CORPORATION'S ASSETS; AND (E) THE MERGER OR CONSOLIDATION WITH ANOTHER CORPORATION.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11:</FormAndLineReferenceDesc>
        <ExplanationTxt>MANAGEMENT PREPARED THE IRS FORM 990 ALONG WITH INDEPENDENT TAX CONSULTANTS WHO SIGN THE RETURN AS PAID PREPARER. PRIOR TO THE FILING DATE, A DRAFT OF THE IRS FORM 990 WAS PROVIDED TO THE ENTIRE BOARD OF TRUSTEES VIA A SECURED WEBSITE. IN ADDITION, THE FINAL FORM 990 WAS PROVIDED TO THE ENTIRE BOARD OF TRUSTEES VIA THE SAME SECURED WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C:</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL OFFICERS, TRUSTEES, KEY EMPLOYEES, PHYSICIANS AND MANAGEMENT EMPLOYEES AT ALL LEVELS, ARE REQUIRED TO COMPLETE AN ANNUAL CONFLICT OF INTEREST DISCLOSURE FORM. THE LHS CORPORATE COMPLIANCE DEPARTMENT MONITORS AND REVIEWS EACH DISCLOSURE FOR COMPLIANCE WITH THE CONFLICT OF INTEREST POLICY. THE CORPORATE COMPLIANCE DEPARTMENT MONITORS CONFLICTS OF INTEREST THROUGH DISCLOSURE SOFTWARE, TRAINING, AND INDIVIDUAL REVIEWS WITH PHYSICIANS, KEY EMPLOYEES, AND MANAGERS. DEPENDING ON THE CONFLICT OF INTEREST: A PERSON COULD BE ASKED TO NOT PARTICIPATE IN DECISIONS MADE ON BEHALF OF THE LAHEY HEALTH SYSTEM, INC. AND AFFILIATES; A PERSON MAY BE TOLD THEY CANNOT BE A PRINCIPAL INVESTIGATOR ON A RESEARCH STUDY; A PERSON MAY BE TOLD THAT THEY CANNOT PERFORM THE TASK THAT CREATES THE CONFLICT; A PERSON COULD BE ASKED TO REMOVE THEMSELVES FROM A COMMITTEE; OR TOLD TO RECUSE THEMSELVES WHEN CERTAIN DECISIONS ARE MADE IN THAT COMMITTEE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 14:</FormAndLineReferenceDesc>
        <ExplanationTxt>LAHEY HEALTH SYSTEM, INC. AND AFFILIATES HAS A WRITTEN DOCUMENT RETENTION AND DESTRUCTION POLICY KNOWN AS THE "RETENTION OF ADMINISTRATIVE AND CLINICAL DOCUMENTS." THE REVISED "RETENTION OF ADMINISTRATIVE AND CLINICAL DOCUMENTS" POLICY WAS APPROVED BY THE MEDICAL PRACTICE AND UTILIZATION COMMITTEE ON JULY 26, 2012.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 15:</FormAndLineReferenceDesc>
        <ExplanationTxt>INDEPENDENT MEMBERS OF THE BOARD OF TRUSTEES COMPRISE THE COMPENSATION COMMITTEE. THE COMMITTEE SETS THE COMPENSATION AND BENEFITS FOR THE CEO AND ALSO REVIEWS AND APPROVES RECOMMENDATIONS FOR THE COMPENSATION AND BENEFITS FOR DISQUALIFIED INDIVIDUALS AND OTHERS. THE COMMITTEE SEEKS THE ADVICE OF EXTERNAL COMPENSATION CONSULTANTS. COMPARABILITY DATA IS PROVIDED, ANALYZED, AND DOCUMENTED BY THE EXTERNAL CONSULTANTS. THE LHS SENIOR VP, CHIEF HUMAN RESOURCES OFFICER PROVIDES THE COMMITTEE WITH ANY REQUESTED INFORMATION. THE COMMITTEE MET SEVERAL TIMES THIS YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S GOVERNING DOCUMENTS AND AUDITED FINANCIAL STATEMENTS ARE AVAILABLE TO THE PUBLIC UPON REQUEST. THE ORGANIZATION'S CONFLICT OF INTEREST POLICY AND OTHER COMPLIANCE POLICIES ARE MADE AVAILABLE TO THE PUBLIC VIA THE ORGANIZATION'S WEBSITE. IN ADDITION, THE ORGANIZATION PRESENTS FINANCIAL INFORMATION TO THE PUBLIC AS AN ATTACHMENT TO ITS MASSACHUSETTS OFFICE OF THE ATTORNEY GENERAL FORM PC.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VII, SECTION A:</FormAndLineReferenceDesc>
        <ExplanationTxt>NORTHEAST BEHAVIORAL HEALTH CORPORATION AND ITS RELATED ORGANIZATIONS DO NOT COMPENSATE ANY TRUSTEE IN THEIR CAPACITY AS A TRUSTEE. ALL COMPENSATION PAID IS FOR WORK PERFORMED IN THE EMPLOYEE'S JOB TITLE, WHICH IS LISTED ON FORM 990, PART VII DIRECTLY FOLLOWING THE TITLE OF "TRUSTEE".</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VII, SECTION B, LINE 1 &amp; 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>LAHEY HEALTH SHARED SERVICES, INC. ("LHSS") COMPENSATES (PROCESSES PAYMENT) ALL INDEPENDENT CONTRACTORS (VENDORS) ON BEHALF OF THE LAHEY HEALTH SYSTEM, INC. FAMILY OF ORGANIZATIONS. UNDER ITS TAX ID NUMBER, LHSS ISSUES FORM 1099 TO THE INDEPENDENT CONTRACTORS. IN ADDITION, IT SUBMITS THE SAME INFORMATION TO THE INTERNAL REVENUE SERVICE. THE LAHEY HEALTH SYSTEM, INC. FAMILY OF ORGANIZATIONS REIMBURSES LHSS FOR ALL VENDOR PAYMENTS MADE EITHER DIRECTLY OR INDIRECTLY ON THEIR BEHALF.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART III, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>During the year existing programs conducted by affiliate CAB Health &amp; Recovery Services were transferred to NBH.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part I:</FormAndLineReferenceDesc>
        <ExplanationTxt>Lahey Health System and Beth Israel Deaconess Medical Center, Mount Auburn Hospital, New England Baptist Hospital, Inc., Seacoast Regional Health Systems, Inc. (Parent Corporation to Anna Jaques Hospital) and Beth Israel Deaconness Physician Organization, LLC officially merged on March 1, 2019 after receiving approval from the Massachusetts Attorney General and the Federal Trade Commission. Effective March 1, 2019 Beth Israel Lahey Health, Inc. became the sole member of NORTHEAST BEHAVIORAL HEALTH CORPORATION, INC.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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          <BusinessNameLine1Txt>NORTHEAST HEALTH SYSTEMS INC</BusinessNameLine1Txt>
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        <DisregardedEntityName>
          <BusinessNameLine1Txt>CAB Health &amp; Recovery Services Inc</BusinessNameLine1Txt>
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          <BusinessNameLine1Txt>NBH</BusinessNameLine1Txt>
        </DirectControllingEntityName>
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      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>lahey health system inc</BusinessNameLine1Txt>
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        <DisregardedEntityName>
          <BusinessNameLine1Txt>LAHEY CLINIC FOUNDATION INC</BusinessNameLine1Txt>
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          <AddressLine1Txt>41 MALL RD</AddressLine1Txt>
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          <BusinessNameLine1Txt>LHS</BusinessNameLine1Txt>
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        <DisregardedEntityName>
          <BusinessNameLine1Txt>LAHEY HEALTH SHARED SERVICES INC</BusinessNameLine1Txt>
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          <AddressLine1Txt>41 MALL RD</AddressLine1Txt>
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          <BusinessNameLine1Txt>LHS</BusinessNameLine1Txt>
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      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>LAHEY PHYSICIAN COMMUNITY ORGANIZATION I</BusinessNameLine1Txt>
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          <AddressLine1Txt>41 MALL RD</AddressLine1Txt>
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          <ZIPCd>01805</ZIPCd>
        </USAddress>
        <EIN>472248298</EIN>
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          <BusinessNameLine1Txt>LHS</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>WINCHESTER HEALTHCARE MANAGEMENT INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>41 HIGHLAND AVENUE</AddressLine1Txt>
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          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01890</ZIPCd>
        </USAddress>
        <EIN>222701817</EIN>
        <PrimaryActivitiesTxt>MGMT SERVICES</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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          <BusinessNameLine1Txt>LHS</BusinessNameLine1Txt>
        </DirectControllingEntityName>
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      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>WINCHESTER HOSPITAL FOUNDATION INC</BusinessNameLine1Txt>
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          <AddressLine1Txt>41 HIGHLAND AVENUE</AddressLine1Txt>
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          <BusinessNameLine1Txt>WINCHESTER HOSPITAL</BusinessNameLine1Txt>
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        </USAddress>
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          <BusinessNameLine1Txt>WHM</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
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      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>WINCHESTER COMMUNITY ACCT CARE ORG</BusinessNameLine1Txt>
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          <AddressLine1Txt>41 HIGHLAND AVENUE</AddressLine1Txt>
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          <ZIPCd>01890</ZIPCd>
        </USAddress>
        <EIN>223137856</EIN>
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          <BusinessNameLine1Txt>WHM</BusinessNameLine1Txt>
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      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>LAHEY CLINIC HOSPITAL INC</BusinessNameLine1Txt>
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          <AddressLine1Txt>41 MALL RD</AddressLine1Txt>
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          <BusinessNameLine1Txt>LCF</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
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      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>NORTHEAST HOSPITAL CORPORATION</BusinessNameLine1Txt>
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          <AddressLine1Txt>85 HERRICK STREET</AddressLine1Txt>
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          <ZIPCd>01915</ZIPCd>
        </USAddress>
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          <BusinessNameLine1Txt>LHS</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
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      <IdRelatedTaxExemptOrgGrp>
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          <BusinessNameLine1Txt>NORTHEAST MEDICAL PRACTICE</BusinessNameLine1Txt>
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          <AddressLine1Txt>85 HERRICK STREET</AddressLine1Txt>
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          <ZIPCd>01915</ZIPCd>
        </USAddress>
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        <ExemptCodeSectionTxt>501(c) (3)</ExemptCodeSectionTxt>
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        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NHC</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
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      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>HES HOUSING SERVICES INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>199 ROSEWOOD DRIVE SUITE 250</AddressLine1Txt>
          <CityNm>DANVERS</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01923</ZIPCd>
        </USAddress>
        <EIN>223232914</EIN>
        <PrimaryActivitiesTxt>HUD HOUSING</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c) (3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>10</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NBH</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>true</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>NORTHEAST SENIOR HEALTH CORPORATION</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>85 HERRICK STREET</AddressLine1Txt>
          <CityNm>BEVERLY</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01915</ZIPCd>
        </USAddress>
        <EIN>042731137</EIN>
        <PrimaryActivitiesTxt>HEALTHCARE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c) (3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>10</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>LHS</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>NORTHEAST PROF REGISTRY OF NURSES</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>800 CUMMINGS CENTER</AddressLine1Txt>
          <CityNm>BEVERLY</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01915</ZIPCd>
        </USAddress>
        <EIN>201287349</EIN>
        <PrimaryActivitiesTxt>HEALTHCARE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c) (3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>10</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NSH</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>SEACOAST NURSING &amp; REHABILIATION CENTER</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>300 WASHINGTON STREET</AddressLine1Txt>
          <CityNm>GLOUCESTER</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01930</ZIPCd>
        </USAddress>
        <EIN>041305001</EIN>
        <PrimaryActivitiesTxt>HEALTHCARE</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c) (3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>10</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>LHS</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>ADDISON GILBERT SOCIETY INC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>41 MALL ROAD</AddressLine1Txt>
          <CityNm>BURLINGTON</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01805</ZIPCd>
        </USAddress>
        <EIN>464371382</EIN>
        <PrimaryActivitiesTxt>SUPPORT</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501(c) (3)</ExemptCodeSectionTxt>
        <PublicCharityStatusTxt>7</PublicCharityStatusTxt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>LHS</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <IdRelatedOrgTxblPartnershipGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>Lahey clinical Performance Network</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>41 Mall Road</AddressLine1Txt>
          <CityNm>Burlington</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01805</ZIPCd>
        </USAddress>
        <EIN>233336906</EIN>
        <PrimaryActivitiesTxt>risk Contr</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>LHS Inc</BusinessNameLine1Txt>
        </DirectControllingEntityName>
      </IdRelatedOrgTxblPartnershipGrp>
      <IdRelatedOrgTxblPartnershipGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>Lahey Clinical Performance ACO LLC</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>41 Mall Road</AddressLine1Txt>
          <CityNm>Burlington</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01805</ZIPCd>
        </USAddress>
        <EIN>455449249</EIN>
        <PrimaryActivitiesTxt>Coordinati</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>LHS Inc</BusinessNameLine1Txt>
        </DirectControllingEntityName>
      </IdRelatedOrgTxblPartnershipGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>lahey Clinic Insurance Co LTD</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>PO Box HM2450</AddressLine1Txt>
          <CityNm>Hamilton</CityNm>
          <StateAbbreviationCd>AP</StateAbbreviationCd>
          <ZIPCd>01805</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>Insurance</PrimaryActivitiesTxt>
        <LegalDomicileForeignCountryCd>BD</LegalDomicileForeignCountryCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>lhs</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>Foreign Corp</EntityTypeTxt>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>Perpetual Trusts (8)</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>41 Mall Road</AddressLine1Txt>
          <CityNm>Burlington</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01805</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>Support</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NA</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>Trust</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>1212992</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>21349557</ShareOfEOYAssetsAmt>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>Remainder Trusts (16)</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>41 Mall Road</AddressLine1Txt>
          <CityNm>Burlington</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01805</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>Support</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NA</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>Trust</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>341910</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>6715118</ShareOfEOYAssetsAmt>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>Pooled Income Funds (3)</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>41 Mall Road</AddressLine1Txt>
          <CityNm>Burlington</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01805</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>Support</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>NA</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>Trust</EntityTypeTxt>
        <ShareOfTotalIncomeAmt>12695</ShareOfTotalIncomeAmt>
        <ShareOfEOYAssetsAmt>900091</ShareOfEOYAssetsAmt>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1Txt>Northeast Proprietary Corp</BusinessNameLine1Txt>
        </RelatedOrganizationName>
        <USAddress>
          <AddressLine1Txt>85 Herrick Street</AddressLine1Txt>
          <CityNm>Beverly</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01915</ZIPCd>
        </USAddress>
        <EIN>042855191</EIN>
        <PrimaryActivitiesTxt>Medical Se</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>LHS</BusinessNameLine1Txt>
        </DirectControllingEntityName>
        <EntityTypeTxt>Corp</EntityTypeTxt>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedOrgTxblCorpTrGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>false</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>false</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>false</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>false</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>true</LoansOrGuaranteesFromOthOrgInd>
      <AssetSaleToOtherOrgInd>false</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>false</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>false</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>false</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>false</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>false</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>true</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>true</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>true</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>true</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>true</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>true</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>true</TransferFromOtherOrgInd>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>CAB Health &amp; Recovery Services Inc</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>Servi</TransactionTypeTxt>
        <MethodOfAmountDeterminationTxt>Board Approval</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <TransactionsRelatedOrgGrp>
        <OtherOrganizationName>
          <BusinessNameLine1Txt>Health &amp; Education Housing Services</BusinessNameLine1Txt>
        </OtherOrganizationName>
        <TransactionTypeTxt>Servi</TransactionTypeTxt>
        <MethodOfAmountDeterminationTxt>Board Approval</MethodOfAmountDeterminationTxt>
      </TransactionsRelatedOrgGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Schedule R, Part IV:</FormAndLineReferenceDesc>
        <ExplanationTxt>NORTHEAST HOSPITAL CORPORATION, LAHEY CLINIC FOUNDATION, INC., AND WINCHESTER HOSPITAL, RESPECTIVELY, HAVE FOUR, THREE AND ONE PERPETUAL TRUSTS. THE PERPETUAL TRUSTS ARE DOMICILED IN MASSACHUSETTS, PENNSYLVANIA, AND FLORIDA. LAHEY CLINIC FOUNDATION, INC. HAS SIXTEEN REMAINDER TRUSTS. THE REMAINDER TRUSTS ARE DOMICILED IN MASSACHUSETTS, NEW HAMPSHIRE, DELAWARE, AND NEW YORK. LAHEY CLINIC FOUNDATION, INC. HAS THREE POOLED INCOME FUNDS, DOMICILED IN MASSACHUSETTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Schedule R, Part V:</FormAndLineReferenceDesc>
        <ExplanationTxt>The Lahey Health Shared Services, Inc. Philanthropy Department conducts fundraising and solicitation efforts on behalf of all entities within the Lahey Health System, Inc. family of organizations. Lahey Health System, Inc. and its related organizations, Lahey Clinic Foundation, Inc. and its related organizations, Winchester Healthcare Management, Inc. and its related organizations, Northeast Behavioral Health Corporation and its related organizations, Northeast Senior Health Corporation and its related organization, Northeast Health System, Inc. and its related organization, and Northeast Hospital Corporation and its related organization, provide various corporate and OTHER SERVICES TO EACH OTHER. THE ORGANIZATIONS REIMBURSE EACH OTHER FOR EXPENSES INCURRED SUCH AS EMPLOYEE SALARIES AND BENEFITS, MATERIALS, SUPPLIES, UTILITIES, ETC. CASH IS TRANSFERRED BETWEEN THE ORGANIZATIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleR>
  </ReturnData>
</Return>