Nonprofit · EIN 83-0900280
SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS
Also known as SIGN
Tax-exempt (reinstated) · BALTIMORE, MD 21286
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-EZ | $82,261 | $18,027 | $64,234 | $104,874 | – | $104,263 |
Financial details: 990-EZ for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $64,340
- Program service revenue
- $17,921
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $0
- Other expenses
- $18,027
- Program services (functional)
- $59,978
Balance sheet and other
- Total assets, start of year
- $40,029
- Total assets, end of year
- $104,874
- Total liabilities, end of year
- –
- Net assets, end of year
- $104,263
- Cash, savings and investments
- $104,874
- Gross receipts
- $82,261
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-EZ for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Piotr Walczak | Secretary | 1 | $0 |
| Michal Zawadzki | Vice CEO/President | 1 | $0 |
| Miroslaw Janowski | CEO/President | 1 | $0 |
Address and contacts
- Address (IRS master file)
- 606 COVENTRY RD, BALTIMORE, MD 21286-7822
- In care of
- % GIL BLANKENSHIP
- Mailing address (990-N for 2024)
- 606 Coventry Road, Baltimore MD 21286
- Principal officer (990-N for 2024)
- Dorota Kedziorek, 606 Coventry Road, Baltimore MD 21201
- Signed the 990-EZ
- Miroslaw Janowski, CEO/President
- Phone
- (443) 934-8260
Mission
To advance scientific knowledge and education in the field of image-guided neurointerventions through organizing international scientific conferences, fostering collaboration among researchers and clinicians, and promoting the development of novel therapeutic approaches including intra-arterial drug delivery, blood-brain barrier modulation, and molecular imaging for neurological diseases.
Program accomplishments
- SIGN Conference in Basel, Switzerland. But the cost was paid mostly in 2026, so it will be reported on the next year tax return, as cash accounting is selected.Expenses $59,978
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-EZ on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-N on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-N on file |
IRS record
- EIN
- 83-0900280
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (509(a)(2))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2024
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Education (B03)
- Assets (IRS master file)
- $104,874
- Income (IRS master file)
- $82,261
Revocation and reinstatement
- Exemption revoked
- May 15, 2024
- Posted by the IRS
- August 12, 2024
- Reinstated
- Effective May 15, 2024
From the IRS automatic revocation list: organizations that did not file a required return or e-Postcard for three consecutive years.
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-EZ | December 2025 | $82,261 | $18,027 | $104,874 | XML |
| 990-N for 2024 Officer: Dorota Kedziorek | December 31, 2024 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2023 Officer: Dorota Kedziorek | December 31, 2023 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2020 Officer: Gil Blankenship | December 31, 2020 | ≤ $50,000 receipts | – | – | e-Postcard |
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 83-0900280).
Questions about SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS
- What is the EIN of SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS?
- The employer identification number (EIN) of SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS is 83-0900280.
- Is SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS tax-exempt?
- Yes. The IRS revoked its exemption on May 15, 2024 and reinstated it effective May 15, 2024.
- Are donations to SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS 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 SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS 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 SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS last file with the IRS?
- The latest return in the IRS public files is the 990-EZ for the year ended December 2025.
- Who is the principal officer of SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS?
- The 990-N for 2024 names Dorota Kedziorek.
- Who are the officers and directors of SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS?
- The 990-EZ for the year ended December 31, 2025 lists 3 people; 0 received compensation from the organization.
- How much revenue does SOCIETY FOR IMAGE-GUIDED NEUROINTERVENTIONS have?
- On its 990-EZ for the year ended December 31, 2025 it reported revenue of $82,261, expenses of $18,027 and total assets of $104,874 at year end.
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