- Revenue 2025
- $2,776,072
- Expenses 2025
- $2,573,911
Program services were 87.5% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.
As filed
- Subsection
- 03
- Classification
- 1000
- Street
- 1515 E WOODFIELD RD STE 345
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).
Other organizations at this address
8 other organizations in the IRS Business Master File list the same street address. matched by us
This address is a suite or unit (STE 345). Organizations that share one are often clients of the same office-services firm, accountant or registered agent rather than related to each other.
We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.
-
AMERICAN SHOULDER AND ELBOW
EIN 41-1474626
-
ASES FOUNDATION
EIN 36-3313192
-
ASSOCIATION OF BONE & JOINT SURGEONS
EIN 42-0848331
-
HIP SOCIETY
EIN 23-7348162
-
INTERNATIONAL HIP SOCIETY
EIN 39-3566470
-
INTERNATIONAL KNEE SOCIETY
EIN 39-3589784
-
MUSCULOSKELETAL TUMOR SOCIETY
EIN 95-4480540
-
OPERATION WALK USA
EIN 45-5086428
Mission and programs · 2025
Mission
THE KNEE SOCIETY OPERATES TO PROMOTE OUTSTANDING CARE TO PATIENTS WITH KNEE DISORDERS THROUGH INNOVATIVE RESEARCH AND EDUCATION.
-
EDUCATIONAL EVENTS ARE DESIGNED TO PROVIDE PRACTICING ORTHOPAEDIC SURGEONS WITH CURRENT INFORMATION REGARDING DISORDERS OF THE KNEE, SURGICAL AND NON-SURGICAL TREATMENTS FOR THE KNEE, AND EMERGING TECHNOLOGY. SCIENTIFIC PAPERS AND SYMPOSIA WILL PRESENT INFORMATION ON TOTAL KNEE ARTHROPLASTY TO ENGANCE THE CARE OF PATIENTS WITH PAINFUL, ARTHITIC KNEE JOINTS. THE SOCIETY ALSO PROVIDES MEMBERS WITH THE ABILITY TO ORGANIZE VARIOUS EDUCATIONAL SEMINARS AND LECTURES PROVIDED ON INTERIM BASIS.
Expenses $2,251,644 · Grants $65,824 · Revenue $2,442,931
As filed on the 2025 return.
Officers and directors · 2025
As listed in Part VII of the 2025 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.
-
Steven B Haas MDSTEVEN B HAAS MD
PRESIDENT
- Total calculated
- $0
- Hours/week
- 1
-
Craig J Della Valle MDCRAIG J DELLA VALLE MD
1ST VICE PRESIDENT
- Total calculated
- $0
- Hours/week
- 1
-
Richard Iorio MDRICHARD IORIO MD
2ND VICE PRESIDENT
- Total calculated
- $0
- Hours/week
- 1
-
Michael A Mont MDMICHAEL A MONT MD
3RD VICE PRESIDENT
- Total calculated
- $0
- Hours/week
- 1
-
Henry D Clarke MDHENRY D CLARKE MD
IMMEDIATE PAST PRESIDENT
- Total calculated
- $0
- Hours/week
- 1
-
Scott M Sporer MDSCOTT M SPORER MD
SECRETARY
- Total calculated
- $0
- Hours/week
- 1
-
Charles L Nelson MDCHARLES L NELSON MD
TREASURER
- Total calculated
- $0
- Hours/week
- 1
-
David J Mayman MDDAVID J MAYMAN MD
COMMITTEE CHAIR
- Total calculated
- $0
- Hours/week
- 1
-
James I Huddleston III MDJAMES I HUDDLESTON III MD
COMMITTEE CHAIR
- Total calculated
- $0
- Hours/week
- 1
-
Fred D Cushner MDFRED D CUSHNER MD
COMMITTEE CHAIR
- Total calculated
- $0
- Hours/week
- 1
-
James A Browne MDJAMES A BROWNE MD
MEMBER-AT-LARGE
- Total calculated
- $0
- Hours/week
- 1
-
Jess H Lonner MDJESS H LONNER MD
MEMBER-AT-LARGE
- Total calculated
- $0
- Hours/week
- 1
-
Shuichi Matsuda MDSHUICHI MATSUDA MD
EX-OFFICIO MEMBER-AT-LARGE
- Total calculated
- $0
- Hours/week
- 1
-
Olga FoleyOLGA FOLEY
EXECUTIVE DIRECTOR
- Total calculated
- $0
- Hours/week
- 40
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, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.
Filings
-
2025
- Revenue
- $2,776,072
- Expenses
- $2,573,911
- Contributions
- $192,058
- Grants paid
- $65,824
-
2024
- Revenue
- $2,478,874
- Expenses
- $2,118,181
- Contributions
- $355,023
- Grants paid
- $14,016
-
2023
- Revenue
- $1,844,196
- Expenses
- $1,855,628
- Contributions
- $337,897
- Grants paid
- $23,000
-
2022
- Revenue
- $2,113,472
- Expenses
- $1,978,838
- Contributions
- $871,018
- Grants paid
- $41,333
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
-
2021 · 990
- Revenue
- $1,876,790
- Expenses
- $1,738,650
- Assets (EOY)
- $4,620,112
-
2020 · 990
- Revenue
- $1,117,754
- Expenses
- $836,821
- Assets (EOY)
- $3,970,330
-
2019 · 990
- Revenue
- $683,573
- Expenses
- $579,992
- Assets (EOY)
- $3,374,539
-
2018 · 990
- Revenue
- $660,000
- Expenses
- $591,206
- Assets (EOY)
- $2,925,413
-
2017 · 990
- Revenue
- $555,706
- Expenses
- $473,381
- Assets (EOY)
- $3,003,193
-
2016 · 990
- Revenue
- $707,591
- Expenses
- $629,217
- Assets (EOY)
- $2,732,995
-
2015 · 990
- Revenue
- $1,041,560
- Expenses
- $477,493
- Assets (EOY)
- $2,638,607
-
2014 · 990
- Revenue
- $1,208,027
- Expenses
- $407,085
- Assets (EOY)
- $2,029,800
-
2013 · 990
- Revenue
- $549,340
- Expenses
- $514,487
- Assets (EOY)
- $1,265,808
-
2012 · 990
- Revenue
- not reported
- Expenses
- $311,737
- Assets (EOY)
- $1,260,738
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. Showing the 10 most recent; the API carries the rest.
Grants made
-
2022 RESEARCH
-
NYU GROSSMAN SCHOOL OF MEDICINE
$20,000
2023 RESEARCH
Grants received
-
2023 MEDICAL / PUBLIC SERVICES
-
2022 PUBLICATION OF MEETING PROCEEDINGS
-
2023 PUBLICATION OF MEETING PROCEEDINGS
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 11 November 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.
What this page reflects
The registration facts above come from the IRS Business Master File published 9 November 2026 and read 9 November 2026, for every organization at once. Returns through tax year 2025, the newest we have parsed for this organization.