Nonprofit · EIN 20-5805658
INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS
Tax-exempt · VALENCIA, CA 91355
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $987,126 | $1,045,258 | -$58,132 | $1,095,553 | $222,803 | $872,750 |
| December 31, 2024 | 990 | $964,116 | $1,044,524 | -$80,408 | $1,342,609 | $464,521 | $878,088 |
| December 31, 2023 | 990 | $641,559 | $651,620 | -$10,061 | $1,201,522 | $275,894 | $925,628 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $881,622
- Membership dues
- $881,622
- Program service revenue
- $105,504
- Investment income
- $0
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $0
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Occupancy
- $83,663
- Travel
- $12,885
- Program services (functional)
- $923,373
- Management and general (functional)
- $121,885
Balance sheet and other
- Total assets, start of year
- $1,342,609
- Total assets, end of year
- $1,095,553
- Total liabilities, end of year
- $222,803
- Net assets, end of year
- $872,750
- Gross receipts
- $987,126
- Employees
- 0
- Year formed
- 2004
- 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 |
|---|---|---|---|
| SEIICHIRO ABE | DIRECTOR Trustee or director | – | $0 |
| LORENZO FERRI | PRESIDENT Trustee or director | – | $0 |
| SUZANNE GISBERTZ | VICE PRESIDE Trustee or director | – | $0 |
| JIE HE | DIRECTOR Trustee or director | – | $0 |
| RICHARD VAN HILLEGERSBERG | DIRECTOR Trustee or director | – | $0 |
| WAYNE HOFSTETTER | DIRECTOR Trustee or director | – | $0 |
| KEN KATO | PRESIDENT EL Trustee or director, Officer | – | $0 |
| VANI KONDA | SECRETARY Trustee or director, Officer | – | $0 |
| ZHIGANG LI | DIRECTOR Trustee or director | – | $0 |
| FLORIAN LORDICK | DIRECTOR Trustee or director | – | $0 |
| DANIELA MOLENA | TREASURER Trustee or director, Officer | – | $0 |
| SRAVANTHI PASARSA | DIRECTOR Trustee or director | – | $0 |
| NICHOLAS J SHAHEEN | PAST PRESIDE Trustee or director, Officer | – | $0 |
| HIROYA TAKEUCHI | DIRECTOR Trustee or director | – | $0 |
990 for the year ended December 31, 2024: 14 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| SEIICHIRO ABE | DIRECTOR Trustee or director | – | $0 |
| LORENZO FERRI | PRESIDENT Trustee or director | – | $0 |
| SUZANNE GISBERTZ | TREASURER Trustee or director | – | $0 |
| NEIL GUPTA | PRESIDENT-EL Trustee or director | – | $0 |
| JIE HE | DIRECTOR Trustee or director | – | $0 |
| RICHARD VAN HILLEGERSBERG | DIRECTOR Trustee or director | – | $0 |
| WAYNE HOFSTETTER | DIRECTOR Trustee or director | – | $0 |
| WAYNE HOFSTETTER | DIRECTOR Trustee or director | – | $0 |
| KEN KATO | DIRECTOR Trustee or director | – | $0 |
| VANI KONDA | SECRETARY Trustee or director, Officer | – | $0 |
| ZHIGANG LI | DIRECTOR Trustee or director | – | $0 |
| SRAVANTHI PASARSA | DIRECTOR Trustee or director | – | $0 |
| NICHOLAS J SHAHEEN | PAST PRESIDE Trustee or director, Officer | – | $0 |
| HIDEAKI SHIMADA | VICE PRESIDE Trustee or director, Officer | – | $0 |
990 for the year ended December 31, 2023: 14 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| SEIICHIRO ABE | DIRECTOR Trustee or director | – | $0 |
| LONG-QI CHEN | DIRECTOR Trustee or director | – | $0 |
| LORENZO FERRI | PRESIDENT-EL Trustee or director | – | $0 |
| SUZANNE GISBERTZ | DIRECTOR Trustee or director | – | $0 |
| NEIL GUPTA | VICE PRESIDE Trustee or director | – | $0 |
| RICHARD VAN HILLEGERSBERG | DIRECTOR Trustee or director | – | $0 |
| WAYNE HOFSTETTER | DIRECTOR Trustee or director | – | $0 |
| KEN KATO | DIRECTOR Trustee or director | – | $0 |
| VANI KONDA | SECRETARY Trustee or director, Officer | – | $0 |
| SIMON LAW | PAST PRESIDE Trustee or director | – | $0 |
| SRAVANTHI PASARSA | DIRECTOR Trustee or director | – | $0 |
| NICHOLAS J SHAHEEN | PRESIDENT Trustee or director, Officer | – | $0 |
| HIDEAKI SHIMADA | TREASURER Trustee or director, Officer | – | $0 |
| MICHAEL VAEZI | DIRECTOR Trustee or director | – | $0 |
Address and contacts
- Address (IRS master file)
- 28432 CONSTELLATION RD, VALENCIA, CA 91355-5081
- In care of
- % TOM DEMEESTER
- Principal officer (990 for 2025)
- MARK FERGUSON
- Signed the 990
- MARK FERGUSON, EXECUTIVE DIRECTOR
- Phone
- (661) 775-5923
- Website
- WWW.ISDE.NET
- Return prepared by
- CHARLES K LEE & COMPANY CPA INC
California records
California keeps its own records of charities and corporations. Search them by EIN 20-5805658 or by the name INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS.
- 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 EXCHANGE OF SCIENTIFIC AND MEDICAL KNOWLEDGE OF THE ESOPHAGUS AMONG SPECIALISTS IN THE FIELD INCLUDING PHYSICIANS, SURGEONS, BASIC SCIENTISTS, OTHER HEALTH PROFESSIONALS AND MEMBERS OF RELATED INDUSTRIES.
Program accomplishments
- ANNUAL MEETING - PRESENTATION OF SCIENTIFIC PROGRAMS TO UPDATE MEMBERS IN THE FIELD OF ESOPHAGEAL DISEASESExpenses $758,482
- MEETING AND RECEPTIONS - MISCELLANEOUS MEETINGS HELD DURING THE YEAR
- OTHERExpenses $164,891
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
- 20-5805658
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (170(b)(1)(A)(vi))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2007
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Voluntary health associations and medical disciplines (G03)
- Assets (IRS master file)
- $1,095,553
- Income (IRS master file)
- $987,126
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $987,126 | $1,045,258 | $1,095,553 | XML |
| 990 | December 2024 | $964,116 | $1,044,524 | $1,342,609 | IRS |
| 990 | December 2023 | $641,559 | $651,620 | $1,201,522 | XML |
| 990 | December 2022 | $428,266 | $441,862 | $1,309,455 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990 | December 2019 | – | – | – | IRS |
| 990 | December 2018 | – | – | – | 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 20-5805658).
Questions about INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS
- What is the EIN of INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS?
- The employer identification number (EIN) of INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS is 20-5805658.
- Is INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2007.
- Are donations to INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS 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 INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS 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 INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS 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 INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS?
- The 990 for the year ended December 31, 2025 names MARK FERGUSON.
- Who are the officers and directors of INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS?
- The 990 for the year ended December 31, 2025 lists 14 people; 0 received compensation from the organization.
- How much revenue does INTERNATIONAL SOCIETY FOR DISEASE OF THE ESOPHAGUS have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $987,126, expenses of $1,045,258 and total assets of $1,095,553 at year end.
Other nonprofits in VALENCIA
- MICHAEL HOEFFLIN FOUNDATION EIN 95-4565741 · last filed 990 for 2024
- IWAKI MORI RESEARCH FOUNDATION EIN 27-0698623 · last filed 990-PF for 2025
- SLOW-MOTION MAGIC EIN 83-3064422 · last filed 990-N for 2025
- HENRY MAYO NEWHALL MEMORIAL HOSPITAL EIN 95-2821104 · last filed 990 for 2025
- CALIFORNIA INSTITUTE OF THE ARTS EIN 95-6102146 · last filed 990 for 2025
- ELECTRICORE INC EIN 35-1888396 · last filed 990 for 2025
- TRINITY CLASSICAL ACADEMY EIN 95-4790280 · last filed 990 for 2025
- DAVID HOROWITZ FREEDOM CENTER EIN 95-4194642 · last filed 990 for 2024
All nonprofits in VALENCIA · California · Voluntary health associations and medical disciplines