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US nonprofit · EIN 300234329 · Schaumburg, ILiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 300234329) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe time served.Latest return IRS Form 990 series e-file data - 990 for the year to 31 December 2024: assets, liabilities, staff, website, telephone, pay, related organisations (Schedule R), grants paid (Schedule I).Finances by year IRS Form 990 e-file data - total revenue and total expenses by tax year.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue. Not a statement that the organisation is recruiting.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Orthopaedic Foot & Ankle Foundation

Donations deductible
Revenue
$1.7m
year to 31 December 2024
Expenses
$1.9m
year to 31 December 2024
Total assets
$13m
$521k liabilities
Net assets
$12.5m
assets less liabilities
Directors and trustees
12
5.1 years on average
Staff
0
24 volunteers
Left since last filing
0
no seats appear to have opened
Officers and senior staff
7
named in Part VII
How am I connected?

Orthopaedic Foot & Ankle Foundation's network

12 people2 organisationsi12 people and 2 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (12). Violet dotted lines (5) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.

The board

12 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations in the tables. The network map shows same-name matches as likely links only, never as confirmed.Time served and departures are observed across annual filings. Observed time served is a lower bound - a member may have joined before the first year on record. The organisation reported 9 voting members of its governing body on its latest Form 990 Part VI; we list 12 in Part VII (Part VII does not always name every voting member).
NameRole as filedSinceOn the board
Casey Humbyrd MDTreasurer2024
2 yrs
Christopher Chiodo MDCompany secretary2024
2 yrs
Constatine Demetracopoulos MDMember-at-Large2024
2 yrs
David B Thordarson MD (also filed as David Thordarson MD)Member-at-Large2021
5 yrs
J Kent Ellington MDMember at Large, Through Sept 20242022
4 yrs
Johnathon Backus MDMember-at-Large2024
2 yrs
Joseph S Park MDPresident-Elect2021
5 yrs
Macalus V Hogan MD (also filed as Macalus Hogan MD)President2020
6 yrs
Michael S Aronow MD (also filed as Michael Aronow MD)Member at Large, Through Sept 20242019
7 yrs
Peter G Mangone MD (also filed as Peter Mangone MD)President, Through Sept 20242018
8 yrs
Sheldon S LIN MDMember-at-Large2021
5 yrs
Scott J Ellis MD (also filed as Scott Ellis MD, Scott Ellis MD)Member-at-Large2018
8 yrs
Under 5 years5 to 6 years6 years or moreShow all 12 →

Officers and senior leadership

7 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Alena FreyDir of Education & Meetingssince 2020
Catherine PowersDvlpmt Sr Managersince 2020
Elaine Larkin-LeightonExecutive Directorsince 2023
Elaine LeightonExecutive Directorsince 2018
Hazel OrelukDir of Researchsince 2020
Michelle AdamsDirector of Education2018
Shelly EncherDirector of Membership & Outresince 2018

Pay and hours

year to 31 December 2024iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Macalus Hogan MDPresident1$0
Joseph S Park MDPresident-Elect1$0
Sheldon S Lin MDMember-at-Large1$0
Casey Humbyrd MDTreasurer2$0
Christopher Chiodo MDSecretary2$0
Scott Ellis MDMember-at-Large1$0
David Thordarson MDMember-at-Large1$0
Johnathon Backus MDMember-at-Large1$0
Constatine Demetracopoulos MDMember-at-Large1$0
Peter Mangone MDPresident, Through Sept 20241$0
Michael Aronow MDMember at Large, Through Sept 20241$0
J Kent Ellington MDMember at Large, Through Sept 20241$0
Elaine Larkin-LeightonExecutive Director5$0$429k$40k
Catherine PowersDevelopment Senior MGR39$0$135k$34k

About

Legal name
Orthopaedic Foot & Ankle Foundation
EIN
300234329
Address
1515 E Woodfield Rd Ste 850, Schaumburg, IL, 60173-5480
State
Illinois
Mission
To actively advance the american orthopaedic foot & ankle society "aofas" mission by promoting and funding education, research, social impact, and humanitarian endeavors. (as filed on the Form 990)
Activity (NTEE)
H12 Medical research
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Medical Research
Size band
8 (IRS master file code)
Formed
2006
Principal officer
Macalus Hogan MD (as named on the Form 990)
IRS ruling date
1 June 2004
Status
Code 01 (unconditional exemption)
Form 990 filings on record
7, latest 2024
IRS Publication 78
PC (contributions deductible)

Most connected

Related organisations (Schedule R)

RelatedRESEARCH & EDUCATIONAmerican Orthopaedic Foot & Ankle Society

Longest observed on the filings

≥8years on the filingsPeter G Mangone MD
≥8years on the filingsScott J Ellis MD
≥7years on the filingsMichael S Aronow MD
≥6years on the filingsMacalus V Hogan MD

Latest return

year to 31 December 2024iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2024. US dollars, as filed.
Total assets
$13m
Total liabilities
$521k
Net assets or fund balances
$12.5m
Contributions and grants received
$1.5m
Program service revenue
$0
Grants and similar paid out
$1.7m
Employees
0
Volunteers
24

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$1.7m$1.9mDeficit $210k

As filed on the IRS Form 990. US dollars.

Grants paid

1 listediFrom Schedule I of the Form 990: grants and assistance to organisations in the United States, largest first (up to 25). Schedule I is filed only by organisations that gave more than $5,000 to any one recipient.
RecipientPurposeAmount
American Orthopaedic Foot & Ankle SocietyGeneral support$1.7m