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Compensation 990 is an independent service that uses public IRS Form 990 filings as its source data. We clean and standardize this information, but the original filings may contain errors or omissions. Years on this site refer to the organization’s fiscal year end date on the filing.

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Employees Illinois State Medical Society Cheryl L Koos

Cheryl L Koos

Officer

Chief Operating Officer at Illinois State Medical Society

Fiscal year ended December 31, 2024. Published on January 25, 2026.

$221,106
2024

Total compensation

Cheryl L Koos has been listed as an employee of Illinois State Medical Society in Form 990 filings since fiscal year 2023. Total compensation for Cheryl L Koos has increased by 10.9% from 2023 to 2024.

Annual compensation details

$221,106
+10.9%
Chief Operating Officer
2024
$217k org
22.5 hrs/wk
$5k other
--
$199,305
Chief Operating Officer
2023
$200k org
22.5 hrs/wk

Total compensation by year

Compare the compensation of Cheryl L Koos to:

2024

Other employees at Illinois State Medical Society

Alexander R Lerner
Chief Executive Officer
$370,907
$367,660 from orgNo related comp$3,247 other
Margaret Vorpahl
Director, Membership Sales
$150,812
$108,441 from orgNo related comp$42,371 other
David A Wichmann
Chief Financial Officer
$81,029
$75,571 from orgNo related comp$5,458 other
Vyas I Piyush, M.D.
President
$63,679
$63,679 from orgNo related compNo other comp
Robert J Oliver, M.D.
Trustee
$58,943
$58,943 from orgNo related compNo other comp
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Revisions to this profile

January 25, 2026:
2024 Illinois State Medical Society 990 published
January 25, 2026:
2023 Illinois State Medical Society 990 published

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Other people named Cheryl L Koos

2024
Employee
Cheryl Koos
Educational and Scientific Foundation of the Illinois State Medical Society
$216,237