Ascension Medical Group-Southeast Wisconsin Inc
Rooted in the loving ministry of jesus as healer, we commit ourselves to serving all persons with special attention to those who are poor and vulnerable. Our catholic health ministry is dedicated to spiritually-centered, holistic care which sustains and improves the health of individuals and communities. We are advocates for a compassionate and just society through our actions and our words.
Ascension Medical Group-Southeast Wisconsin Inc at a glance
- Total assets
- $64,824,343
- -6.7% vs 2024
- Revenue (2025)
- $235,840,251
- -7.4% vs 2024
- Net investment income (2025)
- $-15,788
- -98.4% vs 2024
- Expenses (2025)
- $296,043,052
- -15.1% vs 2024
- Latest 990 filing
- Form 990, 2025 View filing
Data from IRS Form 990, 2025; updated October 2026.
Who Ascension Medical Group-Southeast Wisconsin Inc funds
Giving History
Giving Over Time
Total grant dollars and number of grants per year
In 2020 it made 1 grant totaling $10K.
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2025 | $64,824,343 | $235,840,251 | $296,043,052 | — | — | $-15,788 |
| 2024 | $69,448,160 | $254,694,727 | $348,543,458 | — | — | $-976,649 |
| 2023 | $85,515,957 | $229,392,488 | $349,851,670 | — | — | $10,523 |
| 2022 | $87,261,142 | $207,135,845 | $337,214,050 | — | — | — |
| 2021 | $90,094,194 | $197,316,646 | $314,002,507 | — | — | — |
| 2020 | $61,223,571 | $198,223,554 | $331,073,134 | $10,000 | 1 | $-31,023 |
About Ascension Medical Group-Southeast Wisconsin Inc
Based on IRS filings
Ascension Medical Group-Southeast Wisconsin Inc is a public charity focused on Health, based in St. Louis, MO. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $64.8M in total assets.
Focus Areas
Leadership & Key People
Officers and directors from IRS filings
Ascension Medical Group-Southeast Wisconsin Inc is led by Theresa K. Hayssen MD, Chair & Physician since 2024 (on filings since 2020); 7 of 19 officers listed in 2025 are compensated.
Officers on the 2025 filing
Theresa K. Hayssen MD
Chair & Physician
Director & Physician → Vice Chair & Physician, 2022
Vice Chair & Physician → Chair & Physician, 2024
On filings since 2020
50 hrs/week
$328K (2020) → $524K (2025)
David E. Miller MD
Director
On filings since 2024
No compensation reported
Dianna Malkowski Pa
Director
On filings since 2024
No compensation reported
Sara Jeanine Clark
Director
On filings since 2024
No compensation reported
Robert Kitsis MD
Director
New on the 2025 filing
No compensation reported
Tejwant Singh MD
Physician
On filings since 2020
50 hrs/week
$1.4M (2020) → $956K (2025)
Andrew Beykovsky MD
Physician
On filings since 2023
50 hrs/week
$822K (2023) → $967K (2025)
Erin M. O'Tool MD
Vice Chair & Physician
On filings since 2024
50 hrs/week
$316K (2024) → $100K (2025)
Jaweed M. Mohiuddin MD
Physician
On filings since 2024
50 hrs/week
$878K (2024) → $1M (2025)
Nicholas Demuro MD
Physician
On filings since 2024
50 hrs/week
$913K (2024) → $1.1M (2025)
Zhaowei Ai MD
Physician
On filings since 2024
50 hrs/week
$970K (2024) → $965K (2025)
Jonathan Sohn
Former Officer
CFO & Ministry Market → Former Officer, 2023
On filings since 2020
No compensation reported
Mark D. Horneffer MD
Former Board Officer
Vice Chair & Chair → Chair, 2021
Chair → Former Board Officer, 2024
On filings since 2020
No compensation reported
Matthew Tyler Hanselman
Former Officer
CFO & Ministry Market → CFO, Ministry Market & Interim CEO, 2023
CFO, Ministry Market & Interim CEO → Former Officer, 2025
On filings since 2022
No compensation reported
Patricia Golden DO
Ex-Officio, CCO & Amg-Wi
Interim President → President & Amg-Wi, 2024
President & Amg-Wi → Ex-Officio, CCO & Amg-Wi, 2025
On filings since 2022
No compensation reported
Carol Opgenorth
Former Board Officer
Secretary & Treasurer → Former Board Officer, 2025
On filings since 2023
No compensation reported
Kendall Troyer MD
Ex-Officio, COO & Amg-Wi
Director → Ex-Officio, COO & Amg-Wi, 2025
On filings since 2024
No compensation reported
Kevin Michael Casey DO
Ex-Officio, CCO & Ascension Wisconsin
Director → Ex-Officio, CCO & Ascension Wisconsin, 2025
On filings since 2024
No compensation reported
Scott Alan Cihak
Ex-Officio, COO & Ascension Wisconsin
New on the 2025 filing
No compensation reported
Former officers (30)
- Former: Jennifer J. Brittig MD (2020–2024) — Director & Physician
- Former: Chad Michael Craig MD (2023–2024) — Director
- Former: Shariff H. Attaya MD (2023–2024) — Physician
- Former: Amy Tamburrino MD (2024) — Physician
- Former: Charles J. Lanzarotti MD (2020–2023) — Physician
- Former: Gregory Brusko DO (2020–2023) — Director
- Former: Om Ahuja MD (2020–2023) — Physician
- Former: Paul T. Mason (2020–2023) — Director
- Former: Monica A. Hilt (2021–2023) — Director
- Former: Christy Renee Weibel-Lynn Aprn (2022–2023) — Director
- Former: Viren Bavishi DO (2022–2023) — President
- Former: Cyril Tabe MD (2023) — Physician
- Former: Brian T. Zafonte MD (2020–2022) — Physician
- Former: Choon Heong P'ng MD (2020–2022) — Vice Chair
- Former: James S. Watson MD (2020–2022) — Director
- Former: John B. Butler MD (2020–2022) — Director
- Former: Kari M. Klasen-Lisi (2020–2022) — Former Key Employee
- Former: Pasquale Bernardi MD (2020–2022) — Director
- Former: Robert Culling DO (2020–2022) — Ex-Officio, President, Clinical & Amg
- Former: Tracy Ann Rogers (2020–2022) — Former Officer
- Former: Anthony C. Nelson MD (2021–2022) — Physician
- Former: Michael E. Curley MD (2022) — Physician
- Former: Bradley McNabb (2020–2021) — Director
- Former: Christine R. Weibel-Lynn Aprn (2020–2021) — Director
- Former: Elizabeth Lemons (2020–2021) — Director
- Former: Mary Beth McDonald (2020–2021) — Former Officer
- Former: Charan Mungara MD (2021) — Physician
- Former: Firas Ghanem MD (2020) — Physician
- Former: Robert D. Lyon MD (2020) — Ex-Officio, Secretary & Treasurer
- Former: Suzanne Sanicola (2020) — Former Key Employee
Data from IRS Form 990 filings, 2020–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $1.1M, to Nicholas Demuro MD (Physician). 7 officers or directors reported compensation on that filing.
Frequently asked questions about Ascension Medical Group-Southeast Wisconsin Inc
How large is Ascension Medical Group-Southeast Wisconsin Inc?
Ascension Medical Group-Southeast Wisconsin Inc reported $64.8M in total assets on its 2025 IRS Form 990. Its revenue that year was $235.8M.
What is Ascension Medical Group-Southeast Wisconsin Inc?
Ascension Medical Group-Southeast Wisconsin Inc is a public charity focused on Health, based in St. Louis, MO. It holds $64.8M in total assets as of 2025.
Where does Ascension Medical Group-Southeast Wisconsin Inc operate?
Ascension Medical Group-Southeast Wisconsin Inc has awarded grants in Wisconsin.
What is Ascension Medical Group-Southeast Wisconsin Inc's EIN?
Ascension Medical Group-Southeast Wisconsin Inc's EIN (Employer Identification Number) is 39-1791586. IRS Form 990 filing data is available on this page for 2020–2025.
Data last updated October 2026. Sourced from IRS Form 990 filings.
Data update history
(2)
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2020 (received by the IRS May 12, 2021)
- Added Form 990 for fiscal year 2025 (received by the IRS May 9, 2026)
Live grants for the work Ascension Medical Group-Southeast Wisconsin Inc funds
Health Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Ascension Medical Group-Southeast Wisconsin Inc's focus areas in our free grants database
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