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Governance Register
US nonprofit · EIN 911697940 · Tukwila, WAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 911697940) - 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 tenure.Latest return IRS Form 990 series e-file data - 990 for the year to 30 June 2025: assets, liabilities, staff, website, telephone, pay.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue (us-approach-v4-clean). Not a statement that the organisation is recruiting.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Tahoma Clinic Foundation's network

6 peoplei6 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (6). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.

The board

6 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.Tenure and departures are observed across annual filings. Observed tenure is a lower bound - a member may have joined before the first year on record. The organisation reported 6 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Charles B CoseeDirector2019
7 yrs
Holly Wei-I HanPresident, Treas2019
7 yrs
Jonathan V WrightDirector2019
7 yrs
Melody SiegerDirector2019
7 yrs
Merrily ManthyDirector2019
7 yrs
Tony SiegerDirector2019
7 yrs
Under 5 years5 to 6 years6 years or more

Pay and hours

year to 30 June 2025iFrom 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
Holly HanPresident & Treasurer3$180k
Jonathan WrightDirector3$0
Merrily MantheyDirector3$0
Melody SiegerSecretary Until Dec 20243$0
Tony SiegerDirector Until Dec 20243$0
Charles B CoseeDirector Until Oct 20243$0

About

Legal name
Tahoma Clinic Foundation
EIN
911697940
Address
6839 Fort Dent Way Ste 134, Tukwila, WA, 98188-2597
State
Washington
Mission
To conduct scientific research regarding natural medicine; to educate the public regarding natural health care; to provide funding for natural health care for persons unable to pay for such care from other sources. (as filed on the Form 990)
Activity (NTEE)
H99 Medical research
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Medical Research
Size band
5 (IRS master file code)
Formed
1995
Principal officer
Holly Han (as named on the Form 990)
IRS ruling date
1 February 1997
Status
Code 01 (unconditional exemption)
Form 990 filings on record
6, latest 2024
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥7years on the filingsCharles B Cosee
≥7years on the filingsHolly Wei-I Han
≥7years on the filingsJonathan V Wright
≥7years on the filingsMelody Sieger

Latest return

year to 30 June 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 30 June 2025. US dollars, as filed.
Total assets
$508k
Total liabilities
$0
Net assets or fund balances
$508k
Contributions and grants received
$4k
Program service revenue
$0
Employees
0
Volunteers
5