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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 Mercy Hospital of Buffalo Mark Sullivan

Mark Sullivan

Former

President CHS - Former at Mercy Hospital of Buffalo

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

$1,864,539
2024

Total compensation

Mark Sullivan has been listed as an employee of Mercy Hospital of Buffalo in Form 990 filings since at least fiscal year 2016. Total compensation for Mark Sullivan has increased by 59.7% from 2016 to 2024.

Annual compensation details

$1,864,539
+7.2%
President CHS - Former
2024
$1.9M related
--
$14k other
--
$1,740,064
+29.9%
President and Chief Executive Officer
2023
$1.6M related
55 hrs/wk
$105k other
--

Total compensation by year

Compare the compensation of Mark Sullivan to:

2024

Other employees at Mercy Hospital of Buffalo

Joyce Markiewicz
President and CEO Admin. CH
$1,912,200
$0 from org$1,851,882 from related$60,318 other
Stephen Downing
Physician
$1,067,409
$1,018,192 from orgNo related comp$49,217 other
James M Garvey
Executive Vice President and Chief Operating Officer
$1,037,889
$0 from org$993,464 from related$44,425 other
Jay Bolnick
Physician
$916,424
$877,210 from orgNo related comp$39,214 other
Alan Bolnick
Physician
$903,153
$887,781 from orgNo related comp$15,372 other
David MacHolz
Chief Financial Officer
$898,011
$0 from org$868,881 from related$29,130 other
Harsh Jain
Physician
$850,004
$816,346 from orgNo related comp$33,658 other
Martin Boryszak
Senior Vice President Acute Care and Pres. MHB
$827,394
$0 from org$796,697 from related$30,697 other
Umair Masood
Physician
$750,936
$721,436 from orgNo related comp$29,500 other
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Revisions to this profile

January 25, 2026:
2024 Mercy Hospital of Buffalo 990 published
January 25, 2026:
2023 Mercy Hospital of Buffalo 990 published
January 25, 2026:
2022 Mercy Hospital of Buffalo 990 published

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