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CHILDRENS ORTHOPAEDIC SURGERY FOUNDATION INC

EIN 04-2943146 BOSTON, MA

Revenue 2024
$93,476,479
Expenses 2024
$101,111,212

Program services were 96.3% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
E122
Classification
1000
Street
300 LONGWOOD AVENUE HU221

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).

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Mininder S Kocher MD

    Director

    Total calculated
    $2,676,100
    From this org
    $2,528,269
    From related orgs
    $0
    Other
    $147,831
    Hours/week
    55 + 5 related

    Schedule J breakdown matched by us

    Base
    $805,170
    Bonus
    $1,602,246
    Other
    $120,853
    Deferred
    $71,000
    Nontaxable benefits
    $76,831
    Filer's total
    $2,676,100

  • Benton E Heyworth MD

    Director

    Total calculated
    $1,860,053
    From this org
    $1,735,902
    From related orgs
    $0
    Other
    $124,151
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $441,667
    Bonus
    $1,238,979
    Other
    $55,256
    Deferred
    $71,000
    Nontaxable benefits
    $53,151
    Filer's total
    $1,860,053

  • Benjamin J Shore MD

    Director

    Total calculated
    $1,904,662
    From this org
    $1,782,903
    From related orgs
    $0
    Other
    $121,759
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $500,000
    Bonus
    $1,231,728
    Other
    $51,175
    Deferred
    $71,000
    Nontaxable benefits
    $50,759
    Filer's total
    $1,904,662

  • Young-Jo Kim MD

    Director

    Total calculated
    $1,664,125
    From this org
    $1,583,933
    From related orgs
    $0
    Other
    $80,192
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $600,000
    Bonus
    $903,468
    Other
    $80,465
    Deferred
    $71,000
    Nontaxable benefits
    $9,192
    Filer's total
    $1,664,125

  • Daniel J Hedequist MD

    Director

    Total calculated
    $1,904,522
    From this org
    $1,783,588
    From related orgs
    $0
    Other
    $120,934
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $600,000
    Bonus
    $1,127,490
    Other
    $56,098
    Deferred
    $71,000
    Nontaxable benefits
    $49,934
    Filer's total
    $1,904,522

  • Donald S Bae MD

    Treasurer

    Total calculated
    $1,489,643
    From this org
    $1,367,295
    From related orgs
    $0
    Other
    $122,348
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $360,000
    Bonus
    $941,406
    Other
    $65,889
    Deferred
    $71,000
    Nontaxable benefits
    $51,348
    Filer's total
    $1,489,643

  • Collin May MD

    Director

    Total calculated
    $1,367,010
    From this org
    $1,273,754
    From related orgs
    $0
    Other
    $93,256
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $400,000
    Bonus
    $801,516
    Other
    $72,238
    Deferred
    $71,000
    Nontaxable benefits
    $22,256
    Filer's total
    $1,367,010

  • Dennis E Kramer MD

    Director

    Total calculated
    $1,574,270
    From this org
    $1,413,323
    From related orgs
    $0
    Other
    $160,947
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $400,000
    Bonus
    $928,256
    Other
    $85,067
    Deferred
    $71,000
    Nontaxable benefits
    $89,947
    Filer's total
    $1,574,270

  • Carley Vuillermin MD

    Director

    Total calculated
    $1,316,469
    From this org
    $1,205,822
    From related orgs
    $0
    Other
    $110,647
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $325,000
    Bonus
    $837,058
    Other
    $43,764
    Deferred
    $71,000
    Nontaxable benefits
    $39,647
    Filer's total
    $1,316,469

  • Andrea Bauer MD

    Director

    Total calculated
    $1,244,884
    From this org
    $1,131,270
    From related orgs
    $0
    Other
    $113,614
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $500,000
    Bonus
    $576,948
    Other
    $54,322
    Deferred
    $71,000
    Nontaxable benefits
    $42,614
    Filer's total
    $1,244,884

  • Matthew D Milewski MD

    Director

    Total calculated
    $1,609,667
    From this org
    $1,493,361
    From related orgs
    $0
    Other
    $116,306
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $500,000
    Bonus
    $944,298
    Other
    $49,063
    Deferred
    $71,000
    Nontaxable benefits
    $45,306
    Filer's total
    $1,609,667

  • Colyn J Watkins MD

    Director

    Total calculated
    $1,187,140
    From this org
    $1,076,493
    From related orgs
    $0
    Other
    $110,647
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $300,000
    Bonus
    $732,729
    Other
    $43,764
    Deferred
    $71,000
    Nontaxable benefits
    $39,647
    Filer's total
    $1,187,140

  • Yi-Meng Yen MD

    Director

    Total calculated
    $1,712,698
    From this org
    $1,516,045
    From related orgs
    $0
    Other
    $196,653
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $400,000
    Bonus
    $965,745
    Other
    $150,300
    Deferred
    $71,000
    Nontaxable benefits
    $125,653
    Filer's total
    $1,712,698

  • M Timothy Hresko MD

    Director

    Total calculated
    $973,744
    From this org
    $895,354
    From related orgs
    $0
    Other
    $78,390
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $540,000
    Bonus
    $280,000
    Other
    $75,354
    Deferred
    $71,000
    Nontaxable benefits
    $7,390
    Filer's total
    $973,744

  • John B Emans MD

    Director

    Total calculated
    $288,149
    From this org
    $206,145
    From related orgs
    $0
    Other
    $82,004
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $90,000
    Bonus
    $45,000
    Other
    $71,145
    Deferred
    $40,957
    Nontaxable benefits
    $41,047
    Filer's total
    $288,149

  • Samantha A Spencer MD

    Clerk

    Total calculated
    $766,759
    From this org
    $686,225
    From related orgs
    $0
    Other
    $80,534
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $400,000
    Bonus
    $225,000
    Other
    $61,225
    Deferred
    $71,000
    Nontaxable benefits
    $9,534
    Filer's total
    $766,759

  • Travis H Matheney MD

    Director

    Total calculated
    $1,217,290
    From this org
    $1,095,165
    From related orgs
    $0
    Other
    $122,125
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $400,000
    Bonus
    $648,500
    Other
    $46,665
    Deferred
    $71,000
    Nontaxable benefits
    $51,125
    Filer's total
    $1,217,290

  • Megan Hannon MD

    Director

    Total calculated
    $872,010
    From this org
    $742,167
    From related orgs
    $0
    Other
    $129,843
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $254,906
    Bonus
    $427,388
    Other
    $59,873
    Deferred
    $71,000
    Nontaxable benefits
    $58,843
    Filer's total
    $872,010

  • Andrea Straccolini MD

    Director (4/25-9/25)

    Total calculated
    $798,582
    From this org
    $726,176
    From related orgs
    $0
    Other
    $72,406
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $300,000
    Bonus
    $369,852
    Other
    $56,324
    Deferred
    $71,000
    Nontaxable benefits
    $1,406
    Filer's total
    $798,582

  • Melissa Christino MD

    Director

    Total calculated
    $792,639
    From this org
    $693,284
    From related orgs
    $0
    Other
    $99,355
    Hours/week
    55 + 5 related

    Schedule J breakdown matched by us

    Base
    $402,037
    Bonus
    $228,788
    Other
    $62,459
    Deferred
    $71,000
    Nontaxable benefits
    $28,355
    Filer's total
    $792,639

  • Susan Mahan MD

    Director

    Total calculated
    $641,477
    From this org
    $531,445
    From related orgs
    $0
    Other
    $110,032
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $300,000
    Bonus
    $180,000
    Other
    $51,445
    Deferred
    $71,000
    Nontaxable benefits
    $39,032
    Filer's total
    $641,477

  • Brian Snyder MD

    Director

    Total calculated
    $684,737
    From this org
    $562,000
    From related orgs
    $0
    Other
    $122,737
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $300,000
    Bonus
    $205,000
    Other
    $57,000
    Deferred
    $71,000
    Nontaxable benefits
    $51,737
    Filer's total
    $684,737

  • Michael B Millis MD

    Director

    Total calculated
    $157,697
    From this org
    $150,045
    From related orgs
    $0
    Other
    $7,652
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $60,000
    Bonus
    $20,000
    Other
    $70,045
    Deferred
    $6,262
    Nontaxable benefits
    $1,390
    Filer's total
    $157,697

  • Martha M Murray MD

    President

    Total calculated
    $988,191
    From this org
    $909,139
    From related orgs
    $0
    Other
    $79,052
    Hours/week
    55 + 5 related

    Schedule J breakdown matched by us

    Base
    $700,000
    Bonus
    $144,228
    Other
    $64,911
    Deferred
    $71,000
    Nontaxable benefits
    $8,052
    Filer's total
    $988,191

  • Craig Birch MD

    Director

    Total calculated
    $1,468,478
    From this org
    $1,373,008
    From related orgs
    $0
    Other
    $95,470
    Hours/week
    60

    Schedule J breakdown matched by us

    Base
    $300,000
    Bonus
    $1,026,190
    Other
    $46,818
    Deferred
    $71,000
    Nontaxable benefits
    $24,470
    Filer's total
    $1,468,478

The first 25 listed. Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead — compensation, contributions to benefit plans, and expense account — and the total sums those. A Schedule J breakdown is as filed: base pay, bonus, other, deferred compensation and nontaxable benefits from this organization, with any from related organizations beside each, and the filer's own total. It is shown with the Part VII listing of the same name on the same return. The form gives no key between the two, so that pairing is ours, and is marked matched by us. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $93,476,479
    Expenses
    $101,111,212
    Contributions
    $266,452
    Grants paid
    $6,095,999
  • 2023
    Revenue
    $89,580,176
    Expenses
    $105,924,064
    Contributions
    $516,841
    Grants paid
    $26,124,592
  • 2022
    Revenue
    $76,080,289
    Expenses
    $84,602,503
    Contributions
    $440,297
    Grants paid
    $6,851,136

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2023 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

  • 2022 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

Nonprofiteer parses the Form 990 only. 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

The 10 largest by cash amount. The API serves every itemized grant.

Where these grants went next →

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 on its 2024 return

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

Listed as of 10 September 2026, under deductibility PC.

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.