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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 Mark Twain Medical Center Robert Diehl

Robert Diehl

Officer

President and CEO (Thru 8/2018) at Mark Twain Medical Center

Fiscal year ended June 30, 2019. Published on January 24, 2026.

$578,514
2019

Total compensation

Robert Diehl has been listed as an employee of Mark Twain Medical Center in Form 990 filings since at least fiscal year 2016.

Annual compensation details

$578,514
+35.3%
President and CEO (Thru 8/2018)
2019
$508k related
--
$71k other
--
$427,437
+83.2%
President and Chief Executive Officer
2018
$341k related
--
$88k other
--

Total compensation by year

Compare the compensation of Robert Diehl to:

2019

Other employees at Mark Twain Medical Center

Katherine A Medeiros
Former Officer
$718,173
$0 from org$615,968 from related$102,205 other
Charles Kassis
Chairman (Start 6/2019)
$670,512
$0 from org$575,614 from related$94,898 other
Christopher M Champlin
Ex-Off Brd Member STRT 6/2019
$527,603
$0 from org$460,755 from related$66,848 other
Robert Allen
Former Officer
$507,141
$426,551 from orgNo related comp$80,590 other
Mohamad A Parsa, M.D.
Physician
$414,199
$344,220 from orgNo related comp$69,979 other
Lonnie Smith, M.D.
CMO
$350,903
$314,007 from orgNo related comp$36,896 other
James F Brennan
Physician
$336,580
$271,483 from orgNo related comp$65,097 other
Ermenegildo Eld Frezza
Physician
$303,367
$268,867 from orgNo related comp$34,500 other
Andrea N Ochoa
Ex-Off Brd Member STRT 6/2019
$296,863
$0 from org$255,468 from related$41,395 other
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Revisions to this profile

January 24, 2026:
2019 Mark Twain Medical Center 990 published
January 24, 2026:
2018 Mark Twain Medical Center 990 published
January 24, 2026:
2017 Mark Twain Medical Center 990 published

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