Nonprofit · EIN 31-6049753
AMERICAN PROSTHODONTIC SOCIETY
Tax-exempt · SAN DIEGO, CA 92109
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $367,359 | $321,579 | $45,780 | $231,238 | $101,103 | $130,135 |
| December 31, 2024 | 990 | $335,548 | $316,878 | $18,670 | $187,904 | $103,549 | $84,355 |
| December 31, 2023 | 990 | $296,362 | $290,444 | $5,918 | $167,557 | $101,872 | $65,685 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $27,001
- Program service revenue
- $339,255
- Investment income
- $1,103
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $0
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Legal fees
- $765
- Accounting fees
- $2,282
- Travel
- $2,375
Balance sheet and other
- Total assets, start of year
- $187,904
- Total assets, end of year
- $231,238
- Total liabilities, end of year
- $101,103
- Net assets, end of year
- $130,135
- Net assets without donor restrictions
- $130,135
- Gross receipts
- $367,359
- Employees
- 0
- Volunteers
- 0
- Year formed
- 1928
- State of legal domicile
- CA
From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.
Officers, directors and key employees
As listed on the 990 for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| JORGE GARAICOA | COUNCILOR Trustee or director | 2 | $0 |
| JORDAN ZANER | COUNCILOR Trustee or director | 2 | $0 |
| KONSTANTINOS CHOCHLIDAKIS | SECRETARY Trustee or director | 2 | $0 |
| SERGIO FLORENCIO | COUNCILOR Trustee or director | 2 | $0 |
| JAMES HUDSON | COUNCILOR Trustee or director | 2 | $0 |
| VINCENZO CASTELLANO | COUNCILOR Trustee or director | 2 | $0 |
| ERNA EINARSDOTTIR | COUNCILOR Trustee or director | 2 | $0 |
| CARLO POGGIO | IMMEDIATE PAST PRESIDENT Officer | 4 | $0 |
| EFFRAT HABSHA | PRESIDENT ELECT Officer | 4 | $0 |
| EVANGELOS ROSSOPOULOS | EXECUTIVE DIRECTOR Officer | 4 | $0 |
| JONATHAN ESQUIVEL | TREASURER Officer | 4 | $0 |
| MARYSE MANASSE | VICE PRESIDENT Officer | 4 | $0 |
| NESTOR SCHEJTMAN | PRESIDENT Officer | 4 | $0 |
990 for the year ended December 31, 2024: 13 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| JONATHAN ESQUIVEL | COUNCILOR Trustee or director | 2 | $0 |
| JORDAN ZANER | COUNCILOR Trustee or director | 2 | $0 |
| KONSTANTINOS CHOCHLIDAKIS | SECRETARY Trustee or director | 2 | $0 |
| SERGIO FLORENCIO | COUNCILOR Trustee or director | 2 | $0 |
| THOMAS GRABER | COUNCILOR Trustee or director | 2 | $0 |
| VINCENZO CASTELLANO | COUNCILOR Trustee or director | 2 | $0 |
| ERNA EINARSDOTTIR | COUNCILOR Trustee or director | 2 | $0 |
| ALON PREISKEL | IMMEDIATE PAST PRESIDENT Officer | 4 | $0 |
| CARLO POGGIO | PRESIDENT Officer | 4 | $0 |
| EFFRAT HABSHA | VICE PRESIDENT Officer | 2 | $0 |
| EVANGELOS ROSSOPOULOS | EXECUTIVE DIRECTOR Officer | 4 | $0 |
| MARYSE MANASSE | TREASURER Officer | 2 | $0 |
| NESTOR SCHEJTMAN | PRESIDENT ELECT Officer | 2 | $0 |
990 for the year ended December 31, 2023: 13 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ELAHE BEHROOZ | COUNCILOR Trustee or director | 2 | $0 |
| JONATHAN ESQUIVEL | COUNCILOR Trustee or director | 2 | $0 |
| JONATHAN ZANER | COUNCILOR Trustee or director | 2 | $0 |
| KONSTANTINOS CHOCHLIDAKIS | COUNCILOR Trustee or director | 2 | $0 |
| SERGIO FLORENCIO | COUNCILOR Trustee or director | 2 | $0 |
| THOMAS GRABER | COUNCILOR Trustee or director | 2 | $0 |
| ALON PREISKEL | PRESIDENT Officer | 4 | $0 |
| CARLO POGGIO | PRESIDENT ELECT Officer | 2 | $0 |
| EFFRAT HABSHA | SECRETARY Officer | 2 | $0 |
| EVANGELOS ROSSOPOULOS | EXECUTIVE DIRECTOR Officer | 6 | $0 |
| JOSE CORTES | PAST PRESIDENT Officer | 4 | $0 |
| MARYSE MANASSE | TREASURER Officer | 2 | $0 |
| NESTOR SCHEJTMAN PLOTNIK | VICE PRESIDENT Officer | 2 | $0 |
Address and contacts
- Address (IRS master file)
- 4425 CASS ST STE A, SAN DIEGO, CA 92109-4015
- Principal officer (990 for 2025)
- EVANGELOS ROSSOPOULOS, 4425 CASS ST A, SAN DIEGO, CA 92109
- Signed the 990
- EVANGELOS ROSSOPOULOS, EXECUTIVE DIRECTOR
- Phone
- (858) 272-1018
- Website
- WWW.PROSTHO.ORG
- Return prepared by
- DUFFY KRUSPODIN LLP
California records
California keeps its own records of charities and corporations. Search them by EIN 31-6049753 or by the name AMERICAN PROSTHODONTIC SOCIETY.
- Attorney General, Registry of Charities and Fundraisers
- Registration status and filed reports (CT-TR-1, RRF-1)
- Secretary of State, bizfile Online
- Corporation status, entity number, agent for service
- Franchise Tax Board
- Entity status letter (state tax exemption, good standing)
Mission
TO PROMOTE THE ADVANCEMENT OF THE DISCIPLINE OF PROSTHODONTICS BY INTEGRATING THE GENERALIST, SPECIALIST AND DENTAL LABORATORY TECHNOLOGIST IN A MANNER THAT WILL CONTINUOUSLY SEEK IMPROVEMENT OF PATIENT TREATMENT.THIS IS ACCOMPLISHED THROUGH EDUCATION AND RESEARCH.
Program accomplishments
- THE ORGANIZATION CONDUCTS SCIENTIFIC MEETINGS, THE PURPOSE OF WHICH ARE TO PROVIDE EDUCATIONAL INFORMATION TO ITS MEMBERS.
- THE ORGANIZATION PROVIDES A SUBSCRIPTION TO THE JOURNAL OF PROSTHETIC DENTISTRY TO MEMBERS OF THE ORGANIZATION.
What it must file and when
IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990 on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 31-6049753
- Tax-exempt status
- 501(c)(6): Business league or chamber of commerce
- Donations deductible
- No
- Exempt since
- 1954
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Voluntary health associations and medical disciplines (G9XC)
- Assets (IRS master file)
- $231,238
- Income (IRS master file)
- $367,359
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $367,359 | $321,579 | $231,238 | XML |
| 990 | December 2024 | $335,548 | $316,878 | $187,904 | XML |
| 990 | December 2023 | $296,362 | $290,444 | $167,557 | XML |
| 990 | December 2022 | $185,694 | $223,884 | $182,173 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 31-6049753).
Questions about AMERICAN PROSTHODONTIC SOCIETY
- What is the EIN of AMERICAN PROSTHODONTIC SOCIETY?
- The employer identification number (EIN) of AMERICAN PROSTHODONTIC SOCIETY is 31-6049753.
- Is AMERICAN PROSTHODONTIC SOCIETY tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(6) since 1954.
- Are donations to AMERICAN PROSTHODONTIC SOCIETY tax-deductible?
- No. The IRS master file says contributions to it are not deductible.
- Which annual return does AMERICAN PROSTHODONTIC SOCIETY file?
- Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
- When is the next return of AMERICAN PROSTHODONTIC SOCIETY due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did AMERICAN PROSTHODONTIC SOCIETY last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of AMERICAN PROSTHODONTIC SOCIETY?
- The 990 for the year ended December 31, 2025 names EVANGELOS ROSSOPOULOS.
- Who are the officers and directors of AMERICAN PROSTHODONTIC SOCIETY?
- The 990 for the year ended December 31, 2025 lists 13 people; 0 received compensation from the organization.
- How much revenue does AMERICAN PROSTHODONTIC SOCIETY have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $367,359, expenses of $321,579 and total assets of $231,238 at year end.
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