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Governance Register
US nonprofit · EIN 262587835 · Lebanon, NHiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 262587835) - 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.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

New England Neurosurgical Society's network

3 peoplei3 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (3). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.

The board

3 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; we list 3 in Part VII (Part VII does not always name every voting member).
NameRole as filedSinceOn the board
Dennis Oh MD (also filed as Dennis S Oh)President2021
5 yrs
Mike Groff MDCompany secretary2022
4 yrs
Ron I RiesenburgerTreasurer2022
4 yrs
Under 5 years5 to 6 years6 years or more

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
Ron RiesenburgerPresident1$0
Jennifer MoliternoSecretary1$0
Wenya Linda BiTreasurer1$0

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

About

Legal name
New England Neurosurgical Society
EIN
262587835
Address
1 Medical Center Dr, Lebanon, NH, 03756-1000
State
New Hampshire
Mission
The society supports ongoing education, research activities and collegiality. The society and its members provide ongoing mentorship for physicians in training, medical students. The Society proivdes support for training programs in particular, a cranial skull based surgery course. (as filed on the Form 990)
Activity (NTEE)
G03 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
3 (IRS master file code)
Formed
2008
IRS ruling date
1 April 2020
Status
Code 01 (unconditional exemption)
Form 990 filings on record
4, latest 2023
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥5years on the filingsDennis Oh MD
≥4years on the filingsMike Groff MD
≥4years on the filingsRon I Riesenburger

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
$90k
Total liabilities
$0
Net assets or fund balances
$90k
Contributions and grants received
$165k
Program service revenue
$0
Employees
0
Volunteers
5