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MASS GENERAL BRIGHAM INCORPORATED

EIN 51-0491062 SOMERVILLE, MA

As filed

Subsection
03
NTEE code
E21
Classification
1000
Street
399 REVOLUTION DR STE 645

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Group exemption

A subordinate covered by the group exemption of MASS GENERAL BRIGHAM INCORPORATED (EIN 04-3230035). matched by us

The IRS lists each organization's group exemption number; we match a subordinate to its central organization by that number and the affiliation code the IRS assigns.

Filings

No Form 990 filing has been parsed for this organization. The IRS expects a Form 990 or 990-EZ from this organization, and none has been parsed here yet. Older returns it filed are listed below. classified by us Read from the filing-requirement codes the IRS publishes for it in the Business Master File.

Other returns filed

  • 2016 · 990

    Revenue
    $879,903
    Expenses
    $654,858
    Assets (EOY)
    $8,808,040

  • 2015 · 990

    Revenue
    $1,286,056
    Expenses
    $384,387
    Assets (EOY)
    $8,048,383

  • 2014 · 990

    Revenue
    $1,129,591
    Expenses
    $751,262
    Assets (EOY)
    $6,996,990

  • 2013 · 990

    Revenue
    $1,621,143
    Expenses
    $1,528,035
    Assets (EOY)
    $6,713,707

  • 2012 · 990

    Revenue
    not reported
    Expenses
    $934,352
    Assets (EOY)
    $6,406,107

  • 2011 · 990

    Revenue
    not reported
    Expenses
    $874,060
    Assets (EOY)
    $5,580,073

  • 2010 · 990

    Revenue
    not reported
    Expenses
    $768,709
    Assets (EOY)
    $5,333,389

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

Related organizations

From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.

Declared as related by

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Not present in the most recent drop.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 23 October 2026, for every organization at once. No return for this organization has been parsed, so nothing above comes from a filing.