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        <Explanation>EXECUTIVES AND CERTAIN EMPLOYEES ARE COMPENSATED FOR THEIR SERVICES AS EXECUTIVES AND EMPLOYEES OF CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION, INC. THROUGH A RELATED ORGANIZATION'S PAYROLL. TRUSTEES OF CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION, INC. THAT WERE COMPENSATED BY A RELATED ORGANIZATION WERE COMPENSATED FOR SERVICES THAT WERE RENDERED IN OTHER ROLES. TRUSTEES OF CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION, INC. RECEIVE NO COMPENSATION AS TRUSTEES. PART I, LINE 7: MANY OF THE EMPLOYEES OF THE CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION PARTICIPATE IN COMPENSATION MODELS WHICH INCLUDE VARIABLE PAY FOR PERFORMANCE. CRITERIA FOR EARNING INCENTIVES CAN INCLUDE PRODUCTIVITY, CITIZENSHIP, ACHIEVEMENT VS. QUALITY MEASURES OR OTHER FACTORS AS DETERMINED ANNUALLY BY THE ORGANIZATION.</Explanation>
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        <Explanation>THE CORPORATION PROVIDES IN-PATIENT AND OUT-PATIENT SERVICES TO PATIENTS OF THE CAMBRIDGE HEALTH ALLIANCE AND SUPPORTS TEACHING AND RESEARCH ACTIVITIES OF THAT INSTITUTION INCLUDING ALL RELATED ORGANIZATIONS. PART III, LINE 4A: THE CORPORATION EMPLOYS AND CONTRACTS WITH PHYSICIANS OF VARIOUS SPECIALITIES TO PROVIDE A VARIETY OF SERVICES TO THE PATIENTS OF CAMBRIDGE HEALTH ALLIANCE. CHA PRIMARY CARE PHYSICIANS RENDER SERVICES IN APPROXIMATELY 15 LOCATIONS, IN CAMBRIDGE, SOMERVILLE, AND OTHER METRO NORTH COMMUNITIES. PSYCHIATRISTS AND PSYCHOLOGISTS RENDER BOTH OUTPATIENT AND INPATIENT SERVICES. HOSPITAL BASED SERVICES ARE PROVIDED BY PHYSICIANS SUCH AS PATHOLOGY, RADIOLOGY, ANESTHESIA AND HOSPITALIST SERVICES. A WIDE RANGE OF SPECIALIST SERVICES ARE OFFERED TO EMPLOYED AND CONTRACTING PHYSICIANS PRACTICING IN SURGERY, CARDIOLOGY, PULMONOLOGY, ONCOLOGY AND OTHER MEDICAL SPECIALTIES. WHILE THE PRIMARY FOCUS OF MOST PHYSICIANS IS CLINICAL SERVICE TO PATIENTS, MANY PHYSICIANS ALSO PARTICIPATE IN TEACHING AND/OR RESEARCH PROGRAMS. TEACHING RESPONSIBILITIES TO SUPPORT CHA'S OWNERSHIP OF FIVE MEDICAL RESIDENCY PROGRAMS (DENTISTRY, FAMILY MEDICINE, INTERNAL MEDICINE, PSYCHIATRY, AND SURGICAL PODIATRY), PRECEPTING OF MEDICAL RESIDENTS FROM NUMEROUS OTHER ENTITIES INCLUDING MGH, BIDMC, TUFTS MC, AS WELL AS AN AFFILIATION WITH HARVARD MEDICAL SCHOOL FOR MEDICAL STUDENT TRAINING VIA THE INTEGRATED CLERKSHIP PROGRAM. PART VI, LINE 2: CERTAIN TRUSTEES ARE ALSO EMPLOYEES AT OTHER ORGANIZATIONS WITHIN THE CAMBRIDGE HEALTH ALLIANCE SYSTEM. PART VI, LINE 6: CAMBRIDGE HEALTH ALLIANCE IS THE SOLE CORPORATE MEMBER OF CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION, INC. PART VI, LINE 7A: CAMBRIDGE HEALTH ALLIANCE HAS THE RIGHT TO APPOINT, AND DOES APPOINT, ALL MEMBERS OF THE CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION, INC. BOARD OF TRUSTEES. PART VI, LINE 7B: CERTAIN ACTIONS OF THE BOARD OF TRUSTEES MUST BE APPROVED BY CAMBRIDGE HEALTH ALLIANCE, CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION, INC'S SOLE CORPORATE MEMBER, AS SET FORTH IN THE BYLAWS, INCLUDING ADOPTION OF THE BUDGET, ANY MERGER, CONSOLIDATION, JOINT VENTURE, OR AFFILIATION WITH CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION, INC., ANY CAPITAL TRANSACTION, AND INCURRENCE OF DEBT. CAMBRIDGE HEALTH ALLIANCE HAS AUTHORITY TO APPROVE OR DENY ANY DECISION MADE BY CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION, INC'S BOARD OF TRUSTEES. ITEMS CAN BE RECOMMENDED TO THE BOARD OF CAMBRIDGE HEALTH ALLIANCE OR ITS COMMITTEES FOR REVIEW AND APPROVAL. PART VI, LINE 11: CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION, INC'S FORM 990 WAS PREPARED WITH THE ASSISTANCE OF ITS OUTSIDE TAX ACCOUNTANTS AND PAID PREPARER (PRICEWATERHOUSECOOPERS). CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION'S INTERNAL MANAGEMENT AND CHA EMPLOYEES REVIEWED THE FORM 990 AND PROVIDED COMMENTS AND CHANGES. ONCE THE RETURN WAS UPDATED, THE FORM 990 WAS PRESENTED FOR REVIEW TO EACH VOTING MEMBER OF THE CHA FINANCE COMMITTEE. PRICEWATERHOUSECOOPERS THEN FINALIZED THE FORM 990 BASED ON THE REVIEW AND FEEDBACK OF THE CHA FINANCE COMMITTEE. COPIES OF THE COMPLETED FORM 990 WERE DISTRIBUTED IN ELECTRONIC OR PAPER FORM TO MEMBERS OF THE CAMBRIDGE HEALTH ALLIANCE PHYSICIANS ORGANIZATION, INC GOVERNING BODY PRIOR TO FILING WITH IRS. PART VI, LINE 12C: THE ORGANIZATION HAS A CONFLICT OF INTEREST POLICY FOR ITS DIRECTORS AND ONE FOR ITS OFFICERS. THE ORGANIZATION REGULARLY AND CONSISTENTLY MONITORS AND ENFORCES COMPLIANCE WITH THESE CONFLICT OF INTEREST POLICIES BY ANNUALLY SURVEYING EACH OF ITS DIRECTORS AND OFFICERS. OFFICERS AND DIRECTORS ARE ALSO GIVEN A COPY OF THE APPLICABLE CONFLICT OF INTEREST POLICY ALONG WITH THE ANNUAL SURVEY AND ARE REMINDED OF THEIR OBLIGATION TO PROMPTLY REPORT ANY NEW POTENTIAL CONFLICTS THAT ARISE. THE COMPLIANCE OFFICER REVIEWS THE RESPONSES. IF A CONFLICT OF INTEREST IS DETERMINED, THE APPLICABLE INDIVIDUAL IS PRECLUDED FROM PARTICIPATING IN DELIBERATION ON OR DECISION-MAKING REGARDING THE TOPIC GIVING RISE TO THE CONFLICT. EACH CONFLICT POLICY CONTAINS DISCIPLINARY PROVISIONS TO ADDRESS VIOLATIONS OF THE POLICY. PART VI, LINE 14: THE ORGANIZATION HAS AN ACTIVE DOCUMENT RETENTION AND DESTRUCTION POLICY APPROVED BY MANAGEMENT. THIS POLICY HAS NOT BEEN APPROVED BY THE BOARD OR A COMMITTEE OF THE BOARD AS OF JUNE 30, 2011. PART VI, LINES 15A AND 15B: CAMBRIDGE HEALTH ALLIANCE'S (CHA) COMPENSATION COMMITTEE IS THE AUTHORIZED BODY FOR REVIEWING THE PRESIDENT'S COMPENSATION. THE COMMITTEE RELIED UPON COMPARABILITY DATA OBTAINED BY AN INDEPENDENT CONSULTANT WHEN APPROVING THE CEO'S 2010 COMPENSATION AND DISCUSSED THEIR FINDNGS WITH THE ORGANIZATION'S BOARD AND DOCUMENTED THEIR DECISIONS IN THE BOARD MINUTES CHA'S COMPENSATION COMMITTEE IS THE "AUTHORIZED BODY" OF THE BOARD FOR REVIEWING COMPENSATION OF ALL OFFICERS AND KEY EMPLOYEES OF CHA AND ITS SUBSIDIARIES, INCLUDING THE ORGANIZATION. THE COMPENSATION COMMITTEE CONSISTS OF INDEPENDENT MEMBERS AND REVIEWS AND RECOMMENDS COMPENSATION BASED ON MARKET DATA AND BENCHMARKS PROVIDED BY INDEPENDENT CONSULTANTS. PART VI, LINE 19: THE GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS ARE AVAILABLE TO THE PUBLIC EITHER BY MAIL OR IN PERSON AT THE ORGANIZATION'S OFFICE, DEPENDING ON THE FORM OF REQUEST. PART VII: THE FOLLOWING INDIVIDUALS WORK AN AVERAGE OF 50 HOURS PER WEEK AT CAMBRIDGE HEALTH ALLIANCE AND ITS RELATED ORGANIZATIONS, AND RECEIVE COMPENSATION FROM RELATED ORGANIZATIONS: DENNIS KEEFE PAUL ALLISON DAVID PORELL PART XI, LINE 5: CHANGE IN NET ASSETS OR FUND BALANCE - $2,024,385 INCLUDED: RESTRICTED FUND RECEIPTS - $176,852 RESTRICTED FUND RELEASED - ($126,697) RETAINED EARNINGS/FUND EQUITY - $1,974,230</Explanation>
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          <AddressLine1>101 Station Landing 5th Floor</AddressLine1>
          <City>Medford</City>
          <State>MA</State>
          <ZIPCode>02155</ZIPCode>
        </AddressUS>
        <EIN>043543853</EIN>
        <PrimaryActivities>HLTH RESEARCH</PrimaryActivities>
        <LegalDomicileState>MA</LegalDomicileState>
        <ExemptCodeSection>501(C)(3)</ExemptCodeSection>
        <PublicCharityStatus>9</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>CPHC</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>true</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>Alliance Foundation for Community Health</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>101 Station Landing 5th Floor</AddressLine1>
          <City>Medford</City>
          <State>MA</State>
          <ZIPCode>02155</ZIPCode>
        </AddressUS>
        <EIN>010676306</EIN>
        <PrimaryActivities>Foundation</PrimaryActivities>
        <LegalDomicileState>MA</LegalDomicileState>
        <ExemptCodeSection>501(C)(3)</ExemptCodeSection>
        <PublicCharityStatus>11A</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>CPHC</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>true</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>Cambridge Public Health Commission</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>101 Station Landing 5th Floor</AddressLine1>
          <City>Medford</City>
          <State>MA</State>
          <ZIPCode>02155</ZIPCode>
        </AddressUS>
        <EIN>043320571</EIN>
        <PrimaryActivities>Healthcare</PrimaryActivities>
        <LegalDomicileState>MA</LegalDomicileState>
        <ExemptCodeSection>115</ExemptCodeSection>
        <PublicCharityStatus>N/A</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>NA</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>false</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>Cambridge Energy Alliance</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>1385 Cambridge Street</AddressLine1>
          <City>Cambridge</City>
          <State>MA</State>
          <ZIPCode>02139</ZIPCode>
        </AddressUS>
        <EIN>260663000</EIN>
        <PrimaryActivities>Energy Effici</PrimaryActivities>
        <LegalDomicileState>MA</LegalDomicileState>
        <ExemptCodeSection>501(C)(3)</ExemptCodeSection>
        <PublicCharityStatus>9</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>NA</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>false</ControlledOrg>
      </Form990ScheduleRPartII>
      <ReceiptOfIntAnnRentsRoyalties>false</ReceiptOfIntAnnRentsRoyalties>
      <GiftGrantOrCapContrToOtherOrg>false</GiftGrantOrCapContrToOtherOrg>
      <GiftGrantOrCapContrFrOtherOrg>true</GiftGrantOrCapContrFrOtherOrg>
      <LoansOrGuaranteesToOtherOrg>false</LoansOrGuaranteesToOtherOrg>
      <LoansOrGuaranteesFromOtherOrg>false</LoansOrGuaranteesFromOtherOrg>
      <SaleOfAssetsToOtherOrg>false</SaleOfAssetsToOtherOrg>
      <PurchaseOfAssetsFromOtherOrg>false</PurchaseOfAssetsFromOtherOrg>
      <ExchangeOfAssets>false</ExchangeOfAssets>
      <RentalOfFacilitiesToOtherOrgs>false</RentalOfFacilitiesToOtherOrgs>
      <RentalOfFacilitiesFrOtherOrgs>false</RentalOfFacilitiesFrOtherOrgs>
      <PerformOfServicesForOtherOrgs>false</PerformOfServicesForOtherOrgs>
      <PerformOfServicesByOtherOrgs>false</PerformOfServicesByOtherOrgs>
      <SharingOfFacilities>false</SharingOfFacilities>
      <SharingOfPaidEmployees>true</SharingOfPaidEmployees>
      <ReimbursementPaidToOtherOrg>true</ReimbursementPaidToOtherOrg>
      <ReimbursementPaidByOtherOrg>true</ReimbursementPaidByOtherOrg>
      <OtherTransferToOtherOrg>false</OtherTransferToOtherOrg>
      <OtherTransferFromOtherOrg>false</OtherTransferFromOtherOrg>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>SOMERVILLE HOSPITAL</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>N</TransactionType>
        <AmountInvolved>411351</AmountInvolved>
        <MethodOfAmtDetermination>COST</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>NETWORK HEALTH INC</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>N</TransactionType>
        <AmountInvolved>117749</AmountInvolved>
        <MethodOfAmtDetermination>COST</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
      <TransactionsRelatedOrgsTable>
        <NameOfOtherOrganization>
          <BusinessNameLine1>INSTITUTE FOR COMMUNITY HEALTH INC</BusinessNameLine1>
        </NameOfOtherOrganization>
        <TransactionType>N</TransactionType>
        <AmountInvolved>136718</AmountInvolved>
        <MethodOfAmtDetermination>COST</MethodOfAmtDetermination>
      </TransactionsRelatedOrgsTable>
    </IRS990ScheduleR>
  </ReturnData>
</Return>