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US nonprofit · EIN 364712561 · Leesburg, VAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 364712561) - 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 31 December 2025: assets, liabilities, staff, website, telephone, pay.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 (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

International Anal Neoplasia Society

Donations deductible
Revenue
$508k
year to 31 December 2025
Expenses
$518k
year to 31 December 2025
Total assets
$460k
$50k liabilities
Net assets
$411k
assets less liabilities
Directors and trustees
12
3.3y av
Staff
4
40 volunteers
Left since last filing
0
no seats appear to have opened
Voting members
12
reported in Part VI
How am I connected?

International Anal Neoplasia Society's network

12 peoplei12 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (12). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.

The board

12 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 12 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
David Chromy MDBoard Member2025
1 yr
Isabella Rosa-Cunha MDBoard Member2025
1 yr
Joseph Terlizzi MD (also filed as Joseph Terlizzi)Board Member2023
3 yrs
Juan De La Ossa MDBoard Member2025
1 yr
Luis Barroso MDPast Preside2019
7 yrs
Michelle KhanCompany secretary2023
3 yrs
Naokatsu Ando MDBoard Member2025
1 yr
Richard Turner MDTreasurer2025
1 yr
Robert Paolo Iachetta MDBoard Member2025
1 yr
Tamzin Cuming Mbbs Frcs MEDPresident2018
8 yrs
Troy Grennan MD FrcpcPresident El2019
7 yrs
Urska Kogosek MDBoard Member2025
1 yr
Under 5 years5 to 6 years6 years or moreShow all 12 →

Pay and hours

year to 31 December 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
Troy Grennan MD FRCPCPresident El2$0
Michelle KhanSecretary2$0
David Chromy MDBoard Member2$0
Isabella Rosa-Cunha MDBoard Member2$0
Joseph Terlizzi MDBoard Member2$0
Juan de la Ossa MDBoard Member2$0
Luis Barroso MDPast Preside2$0
Naokatsu Ando MDBoard Member2$0
Richard Turner MDTreasurer2$0
Robert Paolo Iachetta MDBoard Member2$0
Urska Kogosek MDBoard Member2$0
Tamzin Cuming MBBS FRCS MedPresident2$0

No pay was reported for anyone in Part VII on this return.

About

Legal name
International Anal Neoplasia Society
EIN
364712561
Address
Po Box 1543, Leesburg, VA, 20177-1543
State
Virginia
Mission
Ians mission is to provide a forum for individuals with a broad spectrum of background, viewpoints and geographic origin, an exchange of ideas and dissemination of knowledge regarding the pathogenesis, diagnosis, treatment and prevention of anal neoplasia. (as filed on the Form 990)
Activity (NTEE)
G12 Voluntary health associations and medical disciplines
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Voluntary Health Associations & Medical Disciplines
Size band
4 (IRS master file code)
Formed
2012
Principal officer
Luis Barroso MD (as named on the Form 990)
IRS ruling date
1 March 2012
Status
Code 01 (unconditional exemption)
Form 990 filings on record
7, latest 2025
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥8years on the filingsTamzin Cuming Mbbs Frcs MED
≥7years on the filingsLuis Barroso MD
≥7years on the filingsTroy Grennan MD Frcpc
≥3years on the filingsJoseph Terlizzi MD

Latest return

year to 31 December 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2025. US dollars, as filed.
Total assets
$460k
Total liabilities
$50k
Net assets or fund balances
$411k
Contributions and grants received
$22k
Program service revenue
$473k
Employees
4
Volunteers
40

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$285k$255k$30k

As filed on the IRS Form 990. US dollars.