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THE KNEE SOCIETY INC

EIN 13-3190169 SCHAUMBURG, IL

Browse the largest nonprofits in Illinois

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.

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 MD

    PRESIDENT

    Total calculated
    $0
    Hours/week
    1
  • Craig J Della Valle MD

    1ST VICE PRESIDENT

    Total calculated
    $0
    Hours/week
    1
  • Richard Iorio MD

    2ND VICE PRESIDENT

    Total calculated
    $0
    Hours/week
    1
  • Michael A Mont MD

    3RD VICE PRESIDENT

    Total calculated
    $0
    Hours/week
    1
  • Henry D Clarke MD

    IMMEDIATE PAST PRESIDENT

    Total calculated
    $0
    Hours/week
    1
  • Scott M Sporer MD

    SECRETARY

    Total calculated
    $0
    Hours/week
    1
  • Charles L Nelson MD

    TREASURER

    Total calculated
    $0
    Hours/week
    1
  • David J Mayman MD

    COMMITTEE CHAIR

    Total calculated
    $0
    Hours/week
    1
  • James I Huddleston III MD

    COMMITTEE CHAIR

    Total calculated
    $0
    Hours/week
    1
  • Fred D Cushner MD

    COMMITTEE CHAIR

    Total calculated
    $0
    Hours/week
    1
  • James A Browne MD

    MEMBER-AT-LARGE

    Total calculated
    $0
    Hours/week
    1
  • Jess H Lonner MD

    MEMBER-AT-LARGE

    Total calculated
    $0
    Hours/week
    1
  • Shuichi Matsuda MD

    EX-OFFICIO MEMBER-AT-LARGE

    Total calculated
    $0
    Hours/week
    1
  • Olga 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

Where these grants went next →

Grants received

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.