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US nonprofit · EIN 264311090 · Phoenix, AZiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 264311090) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe time served.Latest return IRS Form 990 series e-file data - 990 for the year to 31 December 2024: assets, liabilities, staff, website, telephone, pay, related organisations (Schedule R).Finances by year IRS Form 990 e-file data - total revenue and total expenses by tax year.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue. Not a statement that the organisation is recruiting.Deductibility IRS Publication 78 data (code SOUNK), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Medical Toxicology Foundation

Donations deductible
Revenue
$185k
year to 31 December 2024
Expenses
$204k
year to 31 December 2024
Total assets
$1.5m
$267k liabilities
Net assets
$1.2m
assets less liabilities
Directors and trustees
7
5.8 years on average
Staff
14
employees, year to 31 December 2024
Left since last filing
0
no seats appear to have opened
Officers and senior staff
3
named in Part VII
How am I connected?

Medical Toxicology Foundation's network

7 people1 organisationi7 people and 1 organisation on this map.The large node is the subject of this page. Solid lines are what the register itself records (7). Violet dotted lines (3) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.

The board

7 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations in the tables. The network map shows same-name matches as likely links only, never as confirmed.Time served and departures are observed across annual filings. Observed time served is a lower bound - a member may have joined before the first year on record. The organisation reported 10 voting members of its governing body on its latest Form 990 Part VI; we list 7 in Part VII (Part VII does not always name every voting member).
NameRole as filedSinceOn the board
Andrew Stolbach MD (also filed as Andrew Stolbach)Board Member2019
7 yrs
Anthony Pizon MDBoard Member2018
8 yrs
Charles McKay MDBoard Member2018
8 yrs
Lewis NelsonBoard Member2024
2 yrs
Marsha FordBoard Member2024
2 yrs
Maryann Amirshahi MDBoard Member2023
3 yrs
Ziad Kazzi MDBoard Member2018
8 yrs
Under 5 years5 to 6 years6 years or more

Officers and senior leadership

3 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Erica Liebelt MDPresidentsince 2020
Paul M WAXExecutive Directorsince 2018
Timothy Wiegand MDVice Presidentsince 2020

Pay and hours

year to 31 December 2024iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Marsha FordBoard Member3.75$0
Ziad Kazzi MDBoard Member3.75$0
Lewis NelsonBoard Member3.75$0
Charles McKay MDBoard Member3.75$0
Anthony Pizon MDBoard Member3.75$0
Andrew Stolbach MDBoard Member3.75$0
Maryann Amirshahi MDBoard Member3.75$0
Erica Liebelt MDPresident10$0
Timothy Wiegand MDSecretary/Treasurer10$0
Paul WaxExecutive Director/Board M1$0$478k$40k

About

Legal name
Medical Toxicology Foundation
EIN
264311090
Address
10645 N Tatum Blvd Suite 200-111, Phoenix, AZ, 85028-3068
State
Arizona
Mission
To promote the impact and value of medical toxicology in the provision of safe, high quality care. (as filed on the Form 990)
Activity (NTEE)
S41 Community improvement and capacity building
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Community Improvement & Capacity Building
Size band
6 (IRS master file code)
Formed
2008
Principal officer
Erica Liebelt (as named on the Form 990)
IRS ruling date
1 August 2009
Status
Code 01 (unconditional exemption)
Form 990 filings on record
7, latest 2024
IRS Publication 78
SOUNK (contributions deductible)

Most connected

Related organisations (Schedule R)

RelatedDEVELOPMENTAmmerican College of Medical Toxicology Inc

Longest observed on the filings

≥8years on the filingsAnthony Pizon MD
≥8years on the filingsCharles McKay MD
≥8years on the filingsZiad Kazzi MD
≥7years on the filingsAndrew Stolbach MD

Latest return

year to 31 December 2024iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2024. US dollars, as filed.
Total assets
$1.5m
Total liabilities
$267k
Net assets or fund balances
$1.2m
Contributions and grants received
$156k
Program service revenue
$0
Grants and similar paid out
$77k
Employees
14

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$185k$204kDeficit $19k

As filed on the IRS Form 990. US dollars.