Liabilities / Assets
16th percentile
Tied with the lowest-debt nonprofits in its peer group.
EIN 04-3480219 • 501(c)9 • Somerville, MA
Profile
To provide life, sickness, accident and other benefits.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
16th percentile
Tied with the lowest-debt nonprofits in its peer group.
Liabilities / Revenue
19th percentile
Tied with the lowest-debt nonprofits in its peer group.
Net Margin
86th percentile
Higher net margin than 86% of similar nonprofits.
Top Officer Pay
100th percentile
Higher top officer pay than 100% of similar nonprofits.
Top officer pay equals 11.5% of source-year revenue.
Asset Growth
94th percentile
Faster asset growth than 94% of similar nonprofits.
Revenue Growth
24th percentile
Faster revenue growth than 24% of similar nonprofits.
Assets
Up$225,079,842
Up $47,827,989 (+27%) from 2023
Liabilities
Flat$0
Flat from 2023
Net Assets
Up$225,079,842
Up $47,827,989 (+27%) from 2023
Revenue
Down$13,339,849
Down $140,907 (-1.0%) from 2023
Expenses
Down$8,611,415
Down $351,891 (-3.9%) from 2023
Net Income
Up$4,728,434
Up $210,984 (+4.7%) from 2023
Most recent year
2024 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.
To provide life, sickness, accident and other benefits.
To provide life, sickness, accident and other benefits
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $177,251,853 | $225,079,842 | ▲ $47,827,989 |
| Total Assets | $177,251,853 | $225,079,842 | ▲ $47,827,989 |
| Liabilities | |||
| Total Liabilities | $0 | $0 | → $0 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $177,251,853 | $225,079,842 | ▲ $47,827,989 |
| Total Net Assets Fund Balance | $177,251,853 | $225,079,842 | ▲ $47,827,989 |
| Total Liabilities and Net Assets / Fund Balance | $177,251,853 | $225,079,842 | ▲ $47,827,989 |
| Name | Title | Base | Total |
|---|---|---|---|
| - | Trustee | $1,533,818 | $1,533,818 |
| Line Item | Amount |
|---|---|
| Other Expenses | $1,533,818 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Salaries, Compensation, and Employee Benefits | $0 |
| Total Fundraising Expense | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Benefits to Members | $7,077,597 | - | - | $7,077,597 |
| Other Expenses | $1,533,818 | - | - | $1,533,818 |
| Total Functional Expenses | $8,611,415 | $0 | $0 | $8,611,415 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
“Form 990 & copy to members of its governing body a copy of the final return will be made available to the appropriate members of the governing body.”
“Form 990 review the form 990 was prepared and reviewed by the mass general brigham incorporated tax department.”
“Conflict of interest policy for purposes of its annual tax filing, mass general brigham has an annual questionnaire process for obtaining information on interests that may give rise to conflicts from all officers, directors, trustees and key employees. In addition, in connection with mass general brigham's conflict of interest policy, the mass general brigham's office for interactions with industry and office of the general counsel work together to periodically distribute, collect and review disclosure statements from these individuals. The information on each such disclosure is reviewed by each individual's supervisor (who in the case of directors and trustees is deemed to consist of the chairman of the board and the entity's president/ceo, who review the disclosures with the assistance of the general counsel or attorney representatives of her office). Mass general brigham has a conflict of interest policy that applies to all entities in the system*, and which is designed to: (1) identify relationships and conduct that create either conflicts of interest or conflicts of commitment; (2) establish a system for disclosing and resolving potential conflicts; and (3) ensure that transactions are negotiated at arm's length and that payments are at fair market value. Under our policy, when a conflict arises, the individual associated with the outside entity in question must provide full disclosure and completely recuse him/herself from any institutional decision-making about the transaction. In appropriate circumstances, (i) the corporation must consider at least two alternative disinterested competitive proposals; or must determine that two such competitive proposals do not exist or that it would be impractical to elicit or consider such competitive proposals; and (ii) the corporation must determine that, notwithstanding the apparent conflict, the transaction is fair and reasonable to the corporation and is in the best interests of the corporation. A written record must be made of these determinations. Furthermore, transactions that present particularly significant conflicts are reviewed by an independent committee of mass general brigham, which review is also documented. Conflicts of commitment by the mass general brigham president and ceo are addressed by requiring outside activities to be approved by the mass general brigham board chair. * as institutions are added to mass general brigham incorporated there is a transition period.”
“Upon request, the organization makes its governing documents, conflict of interest policy, and financial statements available to the public.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | TO PROVIDE LIFE, SICKNESS, ACCIDENT AND OTHER BENEFITS |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 0 |
| IRS990/BenefitsToMembersGrp/ProgramServicesAmt | 0 | 7077597 |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 7077597 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | MASS GENERAL BRIGHAM - TAX DIRECTOR |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 8572820747 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 399 REVOLUTION DRIVE STE 645 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | SOMERVILLE |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02145 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 0 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 7077597 |
| IRS990/CYContributionsGrantsAmt | 0 | 0 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 1493682 |
| IRS990/CYOtherExpensesAmt | 0 | 1533818 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 11846167 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 4728434 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/CYTotalExpensesAmt | 0 | 8611415 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 13339849 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/Desc | 0 | FUNDING OF TRUST |
| IRS990/DescribedInSection501c3Ind | 0 | 0 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 8611415 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/BusinessName/BusinessNameLine1Txt | 0 | STATE STREET BANK AND TRUST |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 1533818 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | TRUSTEE |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 0 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 1 |
| IRS990/GrantAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 13339849 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 0 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 1 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 1493682 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 1493682 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 177251853 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 225079842 |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | TO PROVIDE LIFE, SICKNESS, ACCIDENT AND OTHER BENEFITS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 177251853 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 225079842 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 43099555 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 177251853 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 225079842 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501cInd | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | TRUSTEE FEE |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 1533818 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 1533818 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrincipalOfficerNm | 0 | MASS GENERAL BRIGHAM INCO |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 525920 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | EMPLOYEE CONTRIBUTIONS |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 11846167 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 11846167 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 7847986 |
| IRS990/PYContributionsGrantsAmt | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 1288466 |
| IRS990/PYOtherExpensesAmt | 0 | 1115320 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 12192290 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 4517450 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/PYTotalExpensesAmt | 0 | 8963306 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 13480756 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 4728434 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 0 |
| IRS990/RelatedEntityInd | 0 | 1 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 0 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 11846167 |
| IRS990/ScheduleBRequiredInd | 0 | 0 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | FORM 990 & COPY TO MEMBERS OF ITS GOVERNING BODY A COPY OF THE FINAL RETURN WILL BE MADE AVAILABLE TO THE APPROPRIATE MEMBERS OF THE GOVERNING BODY. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | FORM 990 REVIEW THE FORM 990 WAS PREPARED AND REVIEWED BY THE MASS GENERAL BRIGHAM INCORPORATED TAX DEPARTMENT. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | CONFLICT OF INTEREST POLICY FOR PURPOSES OF ITS ANNUAL TAX FILING, MASS GENERAL BRIGHAM HAS AN ANNUAL QUESTIONNAIRE PROCESS FOR OBTAINING INFORMATION ON INTERESTS THAT MAY GIVE RISE TO CONFLICTS FROM ALL OFFICERS, DIRECTORS, TRUSTEES AND KEY EMPLOYEES. IN ADDITION, IN CONNECTION WITH MASS GENERAL BRIGHAM'S CONFLICT OF INTEREST POLICY, THE MASS GENERAL BRIGHAM'S OFFICE FOR INTERACTIONS WITH INDUSTRY AND OFFICE OF THE GENERAL COUNSEL WORK TOGETHER TO PERIODICALLY DISTRIBUTE, COLLECT AND REVIEW DISCLOSURE STATEMENTS FROM THESE INDIVIDUALS. THE INFORMATION ON EACH SUCH DISCLOSURE IS REVIEWED BY EACH INDIVIDUAL'S SUPERVISOR (WHO IN THE CASE OF DIRECTORS AND TRUSTEES IS DEEMED TO CONSIST OF THE CHAIRMAN OF THE BOARD AND THE ENTITY'S PRESIDENT/CEO, WHO REVIEW THE DISCLOSURES WITH THE ASSISTANCE OF THE GENERAL COUNSEL OR ATTORNEY REPRESENTATIVES OF HER OFFICE). MASS GENERAL BRIGHAM HAS A CONFLICT OF INTEREST POLICY THAT APPLIES TO ALL ENTITIES IN THE SYSTEM*, AND WHICH IS DESIGNED TO: (1) IDENTIFY RELATIONSHIPS AND CONDUCT THAT CREATE EITHER CONFLICTS OF INTEREST OR CONFLICTS OF COMMITMENT; (2) ESTABLISH A SYSTEM FOR DISCLOSING AND RESOLVING POTENTIAL CONFLICTS; AND (3) ENSURE THAT TRANSACTIONS ARE NEGOTIATED AT ARM'S LENGTH AND THAT PAYMENTS ARE AT FAIR MARKET VALUE. UNDER OUR POLICY, WHEN A CONFLICT ARISES, THE INDIVIDUAL ASSOCIATED WITH THE OUTSIDE ENTITY IN QUESTION MUST PROVIDE FULL DISCLOSURE AND COMPLETELY RECUSE HIM/HERSELF FROM ANY INSTITUTIONAL DECISION-MAKING ABOUT THE TRANSACTION. IN APPROPRIATE CIRCUMSTANCES, (I) THE CORPORATION MUST CONSIDER AT LEAST TWO ALTERNATIVE DISINTERESTED COMPETITIVE PROPOSALS; OR MUST DETERMINE THAT TWO SUCH COMPETITIVE PROPOSALS DO NOT EXIST OR THAT IT WOULD BE IMPRACTICAL TO ELICIT OR CONSIDER SUCH COMPETITIVE PROPOSALS; AND (II) THE CORPORATION MUST DETERMINE THAT, NOTWITHSTANDING THE APPARENT CONFLICT, THE TRANSACTION IS FAIR AND REASONABLE TO THE CORPORATION AND IS IN THE BEST INTERESTS OF THE CORPORATION. A WRITTEN RECORD MUST BE MADE OF THESE DETERMINATIONS. FURTHERMORE, TRANSACTIONS THAT PRESENT PARTICULARLY SIGNIFICANT CONFLICTS ARE REVIEWED BY AN INDEPENDENT COMMITTEE OF MASS GENERAL BRIGHAM, WHICH REVIEW IS ALSO DOCUMENTED. CONFLICTS OF COMMITMENT BY THE MASS GENERAL BRIGHAM PRESIDENT AND CEO ARE ADDRESSED BY REQUIRING OUTSIDE ACTIVITIES TO BE APPROVED BY THE MASS GENERAL BRIGHAM BOARD CHAIR. * AS INSTITUTIONS ARE ADDED TO MASS GENERAL BRIGHAM INCORPORATED THERE IS A TRANSITION PERIOD. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | UPON REQUEST, THE ORGANIZATION MAKES ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTION B, LINE 12 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PART VI, SECTION C, LINE 19 |
| IRS990ScheduleR/AssetExchangeInd | 0 | 0 |
| IRS990ScheduleR/AssetPurchaseFromOtherOrgInd | 0 | 0 |
| IRS990ScheduleR/AssetSaleToOtherOrgInd | 0 | 0 |
| IRS990ScheduleR/DivRelatedOrganizationInd | 0 | 0 |
| IRS990ScheduleR/GiftGrntCapContriFromOthOrgInd | 0 | 0 |
| IRS990ScheduleR/GiftGrntOrCapContriToOthOrgInd | 0 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 0 | MGBCP |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 1 | MGB |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 2 | MGB |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 3 | MEEA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 4 | MGBPI |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 5 | MGBPI |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 6 | BH |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 7 | MEEA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 8 | MEEA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 9 | MGBHP |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 10 | MGB |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 11 | MEEA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DirectControllingEntityName/BusinessNameLine1Txt | 12 | NSPG |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 0 | MERRIMACK VALLEY ENDOSCOPY LLC |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 1 | PARTNERS INNOVATION II LLC |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 2 | MASS GENERAL BRIGHAM VENTURES LLC |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 3 | MASSACHUSETTS EYE & EAR ASSOCIATES LLC |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 4 | PORTLAND INVESTMENTS-PIA LLC |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 5 | PORTLAND INVESTMENTS-EP LLC |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 6 | BRIGHAM HEALTH INTERNATIONAL LLC |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 7 | MEEA - CAPE COD PHO LLC |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 8 | MEEA - WINCHESTER PHO LLC |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 9 | MASS GENERAL BRIGHAM HEALTH PLAN SELECT LLC |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 10 | MASS GENERAL BRIGHAM GP III LLC |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 11 | MASSACHUSETTS EYE & EAR ASSOCIATES NORTH SUBURBAN |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/DisregardedEntityName/BusinessNameLine1Txt | 12 | NSPG BILLING |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EIN | 0 | 043578297 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EIN | 1 | 814444790 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EIN | 2 | 814431654 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EIN | 3 | 474262843 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EIN | 4 | 831118331 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EIN | 5 | 833091607 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EIN | 6 | 833077580 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EIN | 7 | 844317115 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EIN | 8 | 861874441 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EIN | 9 | 300976066 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EIN | 10 | 874097366 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 0 | 359053 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 1 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 2 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 3 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 4 | 17265326 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 5 | 15183291 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 6 | 5948071 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 7 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 8 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 9 | 1122591 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 10 | 47443338 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 11 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/EndOfYearAssetsAmt | 12 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 0 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 1 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 2 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 3 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 4 | ME |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 5 | ME |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 6 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 7 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 8 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 9 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 10 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 11 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/LegalDomicileStateCd | 12 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 0 | MEDICAL SERVICES |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 1 | INVESTMENTS |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 2 | INVESTMENTS |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 3 | BILLING SERVICES |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 4 | INVESTMENTS |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 5 | INVESTMENTS |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 6 | GLOBAL HEALTH CARE |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 7 | BILLING SERVICES |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 8 | BILLING SERVICES |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 9 | INSURANCE COMPANY - HMO |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 10 | INVESTMENTS |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 11 | BILLING SERVICES |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/PrimaryActivitiesTxt | 12 | BILLING SERVICES |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 0 | 5482871 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 1 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 2 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 3 | 1010 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 4 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 5 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 6 | 2613446 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 7 | 45 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 8 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 9 | 43559 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 10 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 11 | 1048881 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/TotalIncomeAmt | 12 | 0 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 0 | ONE PARKWAY |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 1 | 800 BOYLSTON STREET |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 2 | 800 BOYLSTON STREET |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 3 | 243 CHARLES STREET |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 4 | 399 REVOLUTION DRIVE |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 5 | 399 REVOLUTION DRIVE |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 6 | 75 FRANCIS STREET |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 7 | 243 CHARLES STREET |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 8 | 243 CHARLES STREET |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 9 | 399 REVOLUTION DRIVE |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 10 | 215 FIRST STREET SUITE 500 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 11 | 243 CHARLES STREET |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/AddressLine1Txt | 12 | 2 CORPORATION WAY SUITE 180 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 0 | HAVERHILL |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 1 | BOSTON |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 2 | BOSTON |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 3 | BOSTON |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 4 | SOMERVILLE |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 5 | SOMERVILLE |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 6 | BOSTON |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 7 | BOSTON |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 8 | BOSTON |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 9 | SOMERVILLE |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 10 | CAMBRIDGE |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 11 | BOSTON |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/CityNm | 12 | PEABODY |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 1 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 2 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 3 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 4 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 5 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 6 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 7 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 8 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 9 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 10 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 11 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/StateAbbreviationCd | 12 | MA |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 0 | 01830 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 1 | 02199 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 2 | 02199 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 3 | 02114 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 4 | 02145 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 5 | 02145 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 6 | 02115 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 7 | 02114 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 8 | 02114 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 9 | 02145 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 10 | 02142 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 11 | 02114 |
| IRS990ScheduleR/IdDisregardedEntitiesGrp/USAddress/ZIPCd | 12 | 01960 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd | 0 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd | 1 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd | 2 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd | 3 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ControlledOrganizationInd | 4 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt | 0 | NWH |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt | 1 | MGB |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt | 2 | WDH |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt | 3 | WDH |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/DirectControllingEntityName/BusinessNameLine1Txt | 4 | MGBF III |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EIN | 0 | 043209749 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EIN | 1 | 830970929 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EIN | 2 | 030443397 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EIN | 3 | 872100049 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EIN | 4 | 932163190 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EntityTypeTxt | 0 | C |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EntityTypeTxt | 1 | C |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EntityTypeTxt | 2 | C |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EntityTypeTxt | 3 | C |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/EntityTypeTxt | 4 | C |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/LegalDomicileStateCd | 0 | MA |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/LegalDomicileStateCd | 1 | MA |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/LegalDomicileStateCd | 2 | NH |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/LegalDomicileStateCd | 3 | NH |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/LegalDomicileStateCd | 4 | DE |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/OwnershipPct | 0 | 1.00000 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/OwnershipPct | 1 | 1.00000 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/OwnershipPct | 2 | 0.50000 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/OwnershipPct | 3 | 0.50000 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/OwnershipPct | 4 | 1.00000 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/PrimaryActivitiesTxt | 0 | HEALTHCARE |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/PrimaryActivitiesTxt | 1 | INSURANCE COMPANY |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/PrimaryActivitiesTxt | 2 | MANAGEMENT SERVICES |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/PrimaryActivitiesTxt | 3 | HOMECARE & HOSPICE SERVICES |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/PrimaryActivitiesTxt | 4 | INVESTMENTS |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/RelatedOrganizationName/BusinessNameLine1Txt | 0 | NEWTON-WELLESLEY PHYSICIAN HOSPITAL ORG |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/RelatedOrganizationName/BusinessNameLine1Txt | 1 | MASS GENERAL BRIGHAM HEALTH INSURANCE COMPANY |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/RelatedOrganizationName/BusinessNameLine1Txt | 2 | HEALTH PARTNERS OF NEW HAMPSHIRE INC |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/RelatedOrganizationName/BusinessNameLine1Txt | 3 | WENTWORTH HOMECARE AND HOSPICE LLC |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/RelatedOrganizationName/BusinessNameLine1Txt | 4 | MGBV TH HOLDCO INC |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ShareOfEOYAssetsAmt | 0 | 6410311 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ShareOfEOYAssetsAmt | 1 | 55726360 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ShareOfEOYAssetsAmt | 2 | 2057286 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ShareOfEOYAssetsAmt | 3 | 1576301 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ShareOfEOYAssetsAmt | 4 | 625000 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ShareOfTotalIncomeAmt | 0 | 5080112 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ShareOfTotalIncomeAmt | 1 | 77402418 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ShareOfTotalIncomeAmt | 2 | 769057 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/ShareOfTotalIncomeAmt | 3 | 6197983 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/AddressLine1Txt | 0 | 2014 WASHINGTON STREET |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/AddressLine1Txt | 1 | 399 REVOLUTION DRIVE |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/AddressLine1Txt | 2 | 789 CENTRAL AVENUE |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/AddressLine1Txt | 3 | 121 BROADWAY SUITE 115 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/AddressLine1Txt | 4 | ONE MAIN STREET SUITE 510 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/CityNm | 0 | NEWTON |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/CityNm | 1 | SOMERVILLE |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/CityNm | 2 | DOVER |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/CityNm | 3 | DOVER |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/CityNm | 4 | CAMBRIDGE |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/StateAbbreviationCd | 1 | MA |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/StateAbbreviationCd | 2 | NH |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/StateAbbreviationCd | 3 | NH |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/StateAbbreviationCd | 4 | MA |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/ZIPCd | 0 | 02462 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/ZIPCd | 1 | 02145 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/ZIPCd | 2 | 03820 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/ZIPCd | 3 | 03820 |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/USAddress/ZIPCd | 4 | 02142 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DirectControllingEntityName/BusinessNameLine1Txt | 0 | MGB |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DirectControllingEntityName/BusinessNameLine1Txt | 1 | MGB |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DirectControllingEntityName/BusinessNameLine1Txt | 2 | BH |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DirectControllingEntityName/BusinessNameLine1Txt | 3 | MGB |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DirectControllingEntityName/BusinessNameLine1Txt | 4 | WDH |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DirectControllingEntityName/BusinessNameLine1Txt | 5 | MGB |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DirectControllingEntityName/BusinessNameLine1Txt | 6 | MGB |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DisproportionateAllocationsInd | 0 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DisproportionateAllocationsInd | 1 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DisproportionateAllocationsInd | 2 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DisproportionateAllocationsInd | 3 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DisproportionateAllocationsInd | 4 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DisproportionateAllocationsInd | 5 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/DisproportionateAllocationsInd | 6 | 0 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/EIN | 0 | 043268842 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/EIN | 1 | 262899986 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/EIN | 2 | 010873580 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/EIN | 3 | 812762122 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/EIN | 4 | 900975583 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/EIN | 5 | 862788781 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/EIN | 6 | 994930217 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/GeneralOrManagingPartnerInd | 0 | 1 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/GeneralOrManagingPartnerInd | 1 | 1 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/GeneralOrManagingPartnerInd | 2 | 1 |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/GeneralOrManagingPartnerInd | 3 | 1 |
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