Compensation 990
OrganizationsEmployeesBoard MembersGrantsContractorsTop RankingsPricing

Stay updated on 990 organization compensation

© 2026 Civic Register LLC

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.

About•Report a discrepancy•Your privacy choices
Employees Mercy Hospital of Buffalo Dr Mark Jajkowski

Dr Mark Jajkowski

Highest compensated employee

Physician at Mercy Hospital of Buffalo

Fiscal year ended December 31, 2019. Published on January 24, 2026.

$583,614
2019

Total compensation

Dr Mark Jajkowski has been listed as an employee of Mercy Hospital of Buffalo in Form 990 filings since at least fiscal year 2016. Total compensation for Dr Mark Jajkowski has increased by 495.5% from 2016 to 2019.

Annual compensation details

$583,614
+3.6%
Physician
2019
$551k org
55 hrs/wk
$34k other
--
$563,500
Physician
2018
$540k org
55 hrs/wk
$25k other
--

Total compensation by year

Compare the compensation of Dr Mark Jajkowski to:

2019

Other employees at Mercy Hospital of Buffalo

Mark Sullivan
President and Chief Executive Officer
$1,418,629
$0 from org$1,290,346 from related$128,283 other
Joseph McDonald
President and CEO - Former
$1,190,840
$0 from org$1,154,669 from related$36,171 other
James A Dunlop Jr
Executive Vice President and Chief Financial Officer
$1,071,884
$0 from org$800,257 from related$271,627 other
Dr Stephen Downing
Physician
$1,009,756
$973,821 from orgNo related comp$35,935 other
Michael Moley
Senior Vice President, Human Resources - Former
$740,268
$0 from org$702,651 from related$37,617 other
Dr Harsh Jain
Physician
$708,297
$673,420 from orgNo related comp$34,877 other
Joyce Markiewicz
Chief Business Development Officer
$679,703
$0 from org$590,271 from related$89,432 other
William Pryor
Executive Vice President, Chief Admin Officer
$607,977
$0 from org$527,804 from related$80,173 other
Hans Cassagnol
Executive Vice President, Chief Physician
$558,645
$0 from org$484,111 from related$74,534 other
Loading rankings…
Loading related profiles…

Revisions to this profile

January 24, 2026:
2019 Mercy Hospital of Buffalo 990 published
January 24, 2026:
2018 Mercy Hospital of Buffalo 990 published
January 24, 2026:
2017 Mercy Hospital of Buffalo 990 published

Get an email update when compensation for Dr Mark Jajkowski is updated

Related Jobs

View more jobs
Powered by Talroo
Report a discrepancy →
$98,000
Director
2016
$98k org
55 hrs/wk

Other people named Dr Mark Jajkowski

2019
Board Member
Mark Jajkowski
St Francis Geriatric
$98,000
Board Member
Mark Jajkowski
WNY Catholic Long Term Care Inc.
$98,000
Board Member
Mark Jajkowski
Nazareth Home of the Franciscan Sisters
$24,250
Board Member
Mark Jajkowski
Catholic Health System Program for All-Inclusive Care for the Elderly Inc.
$24,250
Board Member
Mark Jajkowski
Mount St Mary's Hospital of Niagara Falls
$24,250
Board Member
Mark Jajkowski
St Elizabeths Home for the Aged
$24,250