Malignant Hyperthermia Association of the United States Inc
The Malignant Hyperthermia Association of the United States, inc. (mhaus or the organization) is a not-for-profit corporation that was formed for the purpose of increasing the medical professions and the general public's awareness and understanding of the syndrome, malignant hyperthermia (MH). Mhaus is dedicated to reducing the morbidity and mortality of MH by improving medical care related to MH, providing support information for patients, and improving the scientific understanding and research related to MH. It performs these objectives by publishing newsletters and articles, hosting educational seminars, attending appropriate professional and public seminars to disseminate information about the syndrome and performing such other functions as required to increase the knowledge of the syndrome.
Malignant Hyperthermia Association of the United States Inc at a glance
In short: Malignant Hyperthermia Association of the United States Inc reported $50K in grants paid in 2025 (a total; its filing lists no individual grants). Source: 2025 IRS Form 990.
- Grants paid (2025)
- $50,000 — reported as a total on the IRS filing, without an itemized list
- +0.0% vs 2024
- Total assets
- $2,585,485
- -0.2% vs 2024
- Revenue (2025)
- $443,807
- -7.3% vs 2024
- Net investment income (2025)
- $100,988
- +15.4% vs 2024
- Expenses (2025)
- $561,323
- +3.3% vs 2024
- Latest 990 filing
- Form 990, 2025 View filing
Data from IRS Form 990, 2025; updated September 2026.
Who Malignant Hyperthermia Association of the United States Inc funds
How this funder distributes its grants
Grant Size Distribution
3 grants across all recorded years
The most common grant size was in the $50–100K range: 3 grants of 3 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
States
Cities
How Malignant Hyperthermia Association of the United States Inc gives
- Giving held roughly steady from 2021 to 2024 (+0%). Method
From the foundation's IRS Form 990 filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2019 to 2025, annual grant giving ranged from $50K (2019) to $50K (2025). In 2025 it reported $50K in grants paid, as a total without an itemized list.
Hatched bars: grants paid as reported on the IRS filing, which lists no individual grants for that year.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| University of Florida Gainsville, FL | Maintain Registry Database | $50,000 |
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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 | $2,585,485 | $443,807 | $561,323 | $50,000 | Total only | $100,988 |
| 2024 | $2,591,420 | $478,687 | $543,493 | $50,000 | 1 | $87,491 |
| 2023 | $2,250,098 | $604,730 | $474,639 | $50,000 | Total only | $82,836 |
| 2022 | $2,011,937 | $521,191 | $491,444 | $50,000 | 1 | $278,551 |
| 2021 | $2,318,292 | $601,778 | $539,199 | $50,000 | 1 | $52,297 |
| 2020 | $1,918,824 | $560,200 | $540,419 | $50,000 | 1 | $45,922 |
| 2019 | $1,932,833 | $713,143 | $643,185 | $50,000 | 1 | $102,266 |
"Total only": grants paid as reported on the IRS filing, which lists no individual grants for that year.
About Malignant Hyperthermia Association of the United States Inc
Based on IRS filings
Malignant Hyperthermia Association of the United States Inc is a public charity focused on Diseases, Disorders & Medical Disciplines, based in Sherburne, NY. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $2.6M in total assets. In 2025, it reported $50K in grants paid as a total on its IRS filing, without an itemized list. Net investment income was $101K.
Focus Areas
Leadership & Key People
Officers and directors from IRS filings
Malignant Hyperthermia Association of the United States Inc is led by Linda Scholl, Executive Director on every filing since 2024; none of the 14 officers listed in 2025 report compensation.
Officers on the 2025 filing
Linda Scholl
Executive Director
On filings since 2024
40 hrs/week
$81K (2024) → $0 (2025)
Watt Stacey
President
Treasurer → President, 2023
On filings since 2022
1 hr/week
No compensation reported
Betts Megan
Board Member
On filings since 2022
1 hr/week
No compensation reported
Caroff Stanley
Vice President-Director of
Vice President → Vice President-Director of Nmsis, 2024
Vice President-Director of Nmsis → Vice President-Director of, 2025
On filings since 2022
1 hr/week
No compensation reported
Keller Curt
Board Member
On filings since 2022
1 hr/week
No compensation reported
Mashman Darlene
Vice President
Board Member → Vice President, 2024
On filings since 2022
1 hr/week
No compensation reported
Mercer Cheryl
Board Member
On filings since 2022
1 hr/week
No compensation reported
Napolitano Steven
Board Member
Secretary → Board Member, 2023
On filings since 2022
1 hr/week
No compensation reported
Poler Mark
Board Member
On filings since 2022
1 hr/week
No compensation reported
Riazi Sheila
Board Member
On filings since 2022
1 hr/week
No compensation reported
Schwendeman Connie
Secretary
Board Member → Secretary, 2023
On filings since 2022
1 hr/week
No compensation reported
Sumanis Jacqueline
Board Member
On filings since 2022
1 hr/week
No compensation reported
Tobin Joseph
Treasurer
President → Treasurer, 2023
On filings since 2022
1 hr/week
No compensation reported
Teeda Pinyavat
Board Member
On filings since 2024
1 hr/week
No compensation reported
Former officers (20)
- Former: Scholl Linda (2022–2023) — Executive Director
- Former: Cahn Julie (2022) — Board Member
- Former: Cheryl Mercer (2019–2021) — Director
- Former: Curt Keller (2019–2021) — Director
- Former: Darlene Mashman MD (2019–2021) — Director
- Former: Georgirene Vladutiu PhD (2019–2021) — Director
- Former: Henry Rosenberg Md Cpe (2019–2021) — Director
- Former: Jaqueline Sumanis Dnap Crna (2019–2021) — Director
- Former: Joseph Tobin MD (2019–2021) — President
- Former: Sheila Riazi Msc MD (2019–2021) — Director
- Former: Stacey Watt MD (2019–2021) — Vice President & Treasurer
- Former: Stanley Caroff MD (2019–2021) — Vice President
- Former: Steven Napolitano Esq. (2019–2021) — Secretary
- Former: Connie Schwendeman Msn Rn Cpan (2021) — Director
- Former: Julie Cahn Dnp Rn Dnor Rn-Bc (2021) — Director
- Former: Mark Poler MD (2021) — Director
- Former: Megan Betts Ms Lgc (2021) — Director
- Former: Bonnie Denholm Dnp RN (2019–2020) — Vice President
- Former: Ronald Litman DO (2019–2020) — Director
- Former: Terri Passig Bsn Rn Cpan Capa (2019–2020) — Director
Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2024 IRS filing
The highest reported compensation on the 2024 filing was $81K, to Linda Scholl (Executive Director).
Frequently asked questions about Malignant Hyperthermia Association of the United States Inc
How much does Malignant Hyperthermia Association of the United States Inc give each year?
Malignant Hyperthermia Association of the United States Inc reported $50K in grants paid in 2025 on its 2025 IRS Form 990, as a total without an itemized list of grants. In 2024 it gave $50K across 1 grant.
How large is Malignant Hyperthermia Association of the United States Inc?
Malignant Hyperthermia Association of the United States Inc reported $2.6M in total assets on its 2025 IRS Form 990. Its revenue that year was $444K.
What is Malignant Hyperthermia Association of the United States Inc?
Malignant Hyperthermia Association of the United States Inc is a public charity focused on Diseases, Disorders & Medical Disciplines, based in Sherburne, NY. It holds $2.6M in total assets as of 2025.
Where does Malignant Hyperthermia Association of the United States Inc operate?
Malignant Hyperthermia Association of the United States Inc has awarded grants in Florida.
What is Malignant Hyperthermia Association of the United States Inc's EIN?
Malignant Hyperthermia Association of the United States Inc's EIN (Employer Identification Number) is 06-1076301. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Data update history
(7)
When this profile's IRS filing data changed on Grantable
- Added Form 990 for fiscal year 2019 (received by the IRS January 23, 2020)
- Updated Form 990 for fiscal year 2020 (received by the IRS August 10, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS June 21, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS June 23, 2023)
- Updated Form 990 for fiscal year 2024 (received by the IRS July 15, 2025)
- Updated Form 990 for fiscal year 2023 (received by the IRS August 14, 2024)
- Added Form 990 for fiscal year 2025 (received by the IRS June 23, 2026)
Live grants for the work Malignant Hyperthermia Association of the United States Inc funds
Diseases, Disorders & Medical Disciplines Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Malignant Hyperthermia Association of the United States Inc's focus areas in our free grants database
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