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STONY BROOK RADIATION ONCOLOGY UNIVERSITY FACULTY PRACTICE CORP

EIN 11-2664726 STONYBROOK, NY

Largest nonprofits in New York

Revenue 2023
$3,557,268
Expenses 2023
$4,113,672

Program services were 90.0% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
E20
Classification
1000
Street
PO BOX 1554

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Other organizations at this address

19 other organizations in the IRS Business Master File list the same street address. matched by us

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Mission and programs · 2023

Mission

PROVIDE CLINICAL INSTRUCTION TO AND SUPERVISION OF MEDICAL SCHOOL STUDENTS, INTERNS AND RESIDENTS AND, INCIDENT THERETO, RENDERING PROFESSIONAL SERVICES.

Activities or mission (Part I)

PROVIDE CLINICAL INSTRUCTION TO AND SUPERVISION OF MEDICAL STUDENTS, INTERNS AND RESIDENTS AND, INCIDENT THERETO, RENDERING PROFESSIONAL SERVICES.

  • THE ORGANIZATION PROVIDES SERVICES IN THE FIELD OF RADIATION ONCOLOGY TO PATIENTS, PROVIDES CLINICAL INSTRUCTION TO AND SUPERVISION OF SCHOOL OF MEDICINE STUDENTS AND HOSPITAL RESIDENTS.

    Expenses $3,701,987 · Revenue $3,551,629

As filed on the 2023 return.

Officers and directors · 2023

As listed in Part VII of the 2023 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Edward Valentine

    DIRECTOR/SECRETARY/TREASURER

    Total calculated
    $289,951
    From this org
    $243,954
    From related orgs
    $0
    Other
    $45,997
    Hours/week
    40 + 10 related

    Schedule J breakdown matched by us

    Base
    $220,996
    Bonus
    $21,000
    Other
    $1,958
    Deferred
    $23,172
    Nontaxable benefits
    $287 + $22,538 related
    Filer's total
    $267,413 + $22,538 related
  • Samuel Ryu

    President & Director

    Total calculated
    $944,744
    From this org
    $514,576
    From related orgs
    $326,763
    Other
    $103,405
    Hours/week
    40 + 10 related

    Schedule J breakdown matched by us

    Base
    $425,000 + $326,763 related
    Bonus
    $86,966
    Other
    $2,610
    Deferred
    $36,600 + $42,479 related
    Nontaxable benefits
    $1,788 + $22,538 related
    Filer's total
    $552,964 + $391,780 related
  • Alexander Stessin

    DIRECTOR

    Total calculated
    $488,029
    From this org
    $342,322
    From related orgs
    $74,701
    Other
    $71,006
    Hours/week
    40 + 10 related

    Schedule J breakdown matched by us

    Base
    $291,712 + $74,701 related
    Bonus
    $48,000
    Other
    $2,610
    Deferred
    $39,210 + $7,470 related
    Nontaxable benefits
    $1,788 + $22,538 related
    Filer's total
    $383,320 + $104,709 related
  • Alexander Slade

    RADIATION ONCOLOGY

    Total calculated
    $342,873
    From this org
    $285,767
    From related orgs
    $0
    Other
    $57,106
    Hours/week
    40 + 10 related

    Schedule J breakdown matched by us

    Base
    $250,168
    Bonus
    $33,000
    Other
    $2,599
    Deferred
    $33,980
    Nontaxable benefits
    $588 + $22,538 related
    Filer's total
    $320,335 + $22,538 related
  • Clare Moran

    RADIATION ONCOLOGY

    Total calculated
    $195,905
    From this org
    $93,347
    From related orgs
    $68,366
    Other
    $34,192
    Hours/week
    40 + 10 related

    Schedule J breakdown matched by us

    Base
    $86,034 + $68,366 related
    Bonus
    $6,182
    Other
    $1,131
    Deferred
    $11,066
    Nontaxable benefits
    $588 + $22,538 related
    Filer's total
    $105,001 + $90,904 related
  • Kartik Mani

    RADIATION ONCOLOGY

    Total calculated
    $455,927
    From this org
    $321,599
    From related orgs
    $67,254
    Other
    $67,074
    Hours/week
    40 + 10 related

    Schedule J breakdown matched by us

    Base
    $281,056 + $67,254 related
    Bonus
    $38,000
    Other
    $2,543
    Deferred
    $37,222 + $6,726 related
    Nontaxable benefits
    $588 + $22,538 related
    Filer's total
    $359,409 + $96,518 related
  • Mark Ashamalla

    RADIATION ONCOLOGY

    Total calculated
    $404,321
    From this org
    $278,745
    From related orgs
    $64,176
    Other
    $61,400
    Hours/week
    40 + 10 related

    Schedule J breakdown matched by us

    Base
    $245,168 + $64,176 related
    Bonus
    $31,000
    Other
    $2,577
    Deferred
    $33,140 + $5,134 related
    Nontaxable benefits
    $588 + $22,538 related
    Filer's total
    $312,473 + $91,848 related

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. A Schedule J breakdown is as filed: base pay, bonus, other, deferred compensation and nontaxable benefits from this organization, with any from related organizations beside each, and the filer's own total. It is shown with the Part VII listing of the same name on the same return. The form gives no key between the two, so that pairing is ours, and is marked matched by us. Earlier years are each on their own filing page.

Filings

  • 2023
    Revenue
    $3,557,268
    Expenses
    $4,113,672
    Contributions
    $0
    Grants paid
    $0
  • 2022
    Revenue
    $4,122,906
    Expenses
    $3,931,172
    Contributions
    $0
    Grants paid
    $0

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990

    Revenue
    $3,809,330
    Expenses
    $3,919,586
    Assets (EOY)
    $1,658,654
  • 2020 · 990

    Revenue
    $3,397,200
    Expenses
    $4,060,744
    Assets (EOY)
    $1,571,179
  • 2019 · 990

    Revenue
    $3,217,453
    Expenses
    $2,437,520
    Assets (EOY)
    $2,578,558
  • 2018 · 990

    Revenue
    $2,802,277
    Expenses
    $2,382,850
    Assets (EOY)
    $1,799,712
  • 2017 · 990

    Revenue
    $2,695,287
    Expenses
    $2,556,797
    Assets (EOY)
    $1,380,285
  • 2016 · 990

    Revenue
    $2,762,325
    Expenses
    $2,557,541
    Assets (EOY)
    $1,241,795
  • 2015 · 990

    Revenue
    $2,999,946
    Expenses
    $2,829,913
    Assets (EOY)
    $1,037,014
  • 2014 · 990

    Revenue
    $3,033,012
    Expenses
    $2,773,595
    Assets (EOY)
    $866,981
  • 2013 · 990

    Revenue
    $2,263,886
    Expenses
    $2,241,096
    Assets (EOY)
    $607,564
  • 2012 · 990

    Revenue
    not reported
    Expenses
    $2,490,524
    Assets (EOY)
    $584,774

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

No itemized grant names this organization as a recipient. Only grants over $5,000 are itemized, and only by filers of the full Form 990.

Related organizations

From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.

Declared on its 2023 return

Declared as related by

Taxable family

From Schedule R Parts I, III and IV: entities that legally are the filer, and taxable partnerships, corporations and trusts it is related to. These record ownership and control, not shared board members or money.

Related partnerships on its 2023 return

  • SB HLTHCARE IPA LLC

    Related · HEALTHCARE · NY

Related corporations and trusts on its 2023 return

  • NICOLLS INDEMNITY SOLUTIONS SPC

    C Corporation · SELF-INSURANCE · CJ

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 13 October 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 1 November 2026, for every organization at once. Returns through tax year 2023, the newest we have parsed for this organization.