Nonprofit · EIN 61-1512265
INTERNATIONAL LYME AND ASSOCIATED DISEASES SOCIETY INC
Tax-exempt · FAIRFAX, VA 22033
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $1,078,146 | $1,147,113 | -$68,967 | $477,748 | $319,989 | $157,759 |
| December 31, 2024 | 990 | $996,370 | $978,162 | $18,208 | $532,960 | $306,234 | $226,726 |
| December 31, 2023 | 990 | $991,594 | $1,026,475 | -$34,881 | $473,998 | $265,480 | $208,518 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $246,436
- Membership dues
- $246,436
- Program service revenue
- $824,739
- Investment income
- $6,971
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $97,052
- Other salaries and wages
- $149,477
- Salaries, compensation and benefits (total)
- $262,749
- Professional fundraising fees
- $0
- Legal fees
- $1,857
- Occupancy
- $3,149
Balance sheet and other
- Total assets, start of year
- $532,960
- Total assets, end of year
- $477,748
- Total liabilities, end of year
- $319,989
- Net assets, end of year
- $157,759
- Gross receipts
- $1,078,146
- Employees
- 2
- Volunteers
- 8
- Year formed
- 2006
- State of legal domicile
- VA
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 | From related orgs |
|---|---|---|---|---|
| Sarah Quillen CEO | Executive Director Officer | 35 | $97,052 | $72,948 |
| Amy Offutt MD | President Trustee or director | 1 | $0 | $0 |
| Steven Harris MD | Vice President Trustee or director | 1 | $0 | $0 |
| Eboni Cornish MD | Treasurer Trustee or director | 1 | $0 | $0 |
| Christine Saba PharmD MD | Secretary Trustee or director | 1 | $0 | $0 |
| Tania Dempsey MD | Director Trustee or director | 1 | $0 | $0 |
| Jody Greenfield DO | Director Trustee or director | 1 | $0 | $0 |
| Cory Tichauer ND | Director Trustee or director | 1 | $0 | $0 |
| Chris Winfrey MD | Director Trustee or director | 1 | $0 | $0 |
| Chad Prusmack MD | Director Trustee or director | 1 | $0 | $0 |
| Rosalie Greenberg | Director Trustee or director | 1 | $0 | $0 |
990 for the year ended December 31, 2024: 10 people
| Name | Title | Hours / week | Compensation | From related orgs |
|---|---|---|---|---|
| Sarah Quillen CEO | Executive Director Officer | 35 | $95,054 | $71,446 |
| Amy Offutt MD | President Trustee or director | 1 | $0 | $0 |
| Steven Harris MD | Vice President Trustee or director | 1 | $0 | $0 |
| Eboni Cornish MD | Treasurer Trustee or director | 1 | $0 | $0 |
| Christine Saba PharmD MD | Secretary Trustee or director | 1 | $0 | $0 |
| Tania Dempsey MD | Director Trustee or director | 1 | $0 | $0 |
| Jody Greenfield DO | Director Trustee or director | 1 | $0 | $0 |
| Cory Tichauer ND | Director Trustee or director | 1 | $0 | $0 |
| Chris Winfrey MD | Director Trustee or director | 1 | $0 | $0 |
| Chad Prusmack MD | Director Trustee or director | 1 | $0 | $0 |
990 for the year ended December 31, 2023: 12 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Sarah Quillen ED Feb-Dec | CEO Officer | 35 | $159,628 |
| Barbara Buchman | Former Executive Director | 1 | $145,438 |
| William Grubb Jan-Apr | CFO Officer | 9 | $8,661 |
| Steven Bock MD | President Trustee or director | 1 | $0 |
| Amy Offutt MD | Vice President Trustee or director | 1 | $0 |
| Casey Kelley MD | Treasurer Trustee or director | 1 | $0 |
| Christine Saba PharmD MD | Secretary Trustee or director | 1 | $0 |
| Omar Morales MD | Director Trustee or director | 1 | $0 |
| Jody Greenfield DO | Director Trustee or director | 1 | $0 |
| Eboni Cornish MD | Director Trustee or director | 1 | $0 |
| B Robert Mozayeni MD | Director Trustee or director | 1 | $0 |
| Michele Deantonio MD | Director Trustee or director | 1 | $0 |
Address and contacts
- Address (IRS master file)
- 4000 LEGATO RD, FAIRFAX, VA 22033-2892
- In care of
- % RAPHAEL STRICKER
- Principal officer (990 for 2025)
- Sarah Quillen, 4000 Legato Rd, 1100, Fairfax, VA 22033
- Signed the 990
- Sarah Quillen, Executive Director
- Phone
- (301) 263-1080
- Website
- www.ilads.org
Mission
An international medical society whose mission is to disseminate scientific knowledge and enhance clinical expertise relating to Lyme and Associated diseases. Supports a collaborative effort among scientists, researchers, healthcare providers, and others.
Program accomplishments
- ILADS holds an annual scientific conference to advance the clinical knowledge, diagnosis, and treatment of Lyme and Associated vector-borne diseases. Sessions are designed to teach medical professionals the cutting-edge techniques of diagnosis and treatment, explore pathophysiological mechanisms of chronic diseases, enhance collaboration between community clinicians and university scientists, and to encourage initiation and publication of clinical studies.Expenses $476,819 · revenue $677,561
- The organization hold international, regional, and virtual meetings and conferences to provide updates for medical professionals on advances in clinical knowledge, treatment techniques, and the opportunity for collaboration between scientists, physicians, and other professionals who care for patients with Lyme and associated vector-borne diseases.Expenses $193,578 · revenue $135,287
- ILADS members receive access to members-only discussion forums, complementary webinars, a members-only newsletter, opportunities to join committees and network with medical professionals with similar interests and concerns, as well as discounts, on courses, and various events.revenue $246,436
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
- 61-1512265
- Tax-exempt status
- 501(c)(6): Business league or chamber of commerce
- Donations deductible
- No
- Exempt since
- 2007
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Community improvement and capacity building (S40)
- Assets (IRS master file)
- $477,748
- Income (IRS master file)
- $1,078,146
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $1,078,146 | $1,147,113 | $477,748 | IRS |
| 990 | December 2024 | $996,370 | $978,162 | $532,960 | IRS |
| 990 | December 2023 | $991,594 | $1,026,475 | $473,998 | XML |
| 990 | December 2022 | $948,069 | $837,459 | $415,853 | 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 61-1512265).
Questions about INTERNATIONAL LYME AND ASSOCIATED DISEASES SOCIETY INC
- What is the EIN of INTERNATIONAL LYME AND ASSOCIATED DISEASES SOCIETY INC?
- The employer identification number (EIN) of INTERNATIONAL LYME AND ASSOCIATED DISEASES SOCIETY INC is 61-1512265.
- Is INTERNATIONAL LYME AND ASSOCIATED DISEASES SOCIETY INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(6) since 2007.
- Are donations to INTERNATIONAL LYME AND ASSOCIATED DISEASES SOCIETY INC tax-deductible?
- No. The IRS master file says contributions to it are not deductible.
- Which annual return does INTERNATIONAL LYME AND ASSOCIATED DISEASES SOCIETY INC 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 LYME AND ASSOCIATED DISEASES SOCIETY INC 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 LYME AND ASSOCIATED DISEASES SOCIETY INC 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 LYME AND ASSOCIATED DISEASES SOCIETY INC?
- The 990 for the year ended December 31, 2025 names Sarah Quillen.
- Who are the officers and directors of INTERNATIONAL LYME AND ASSOCIATED DISEASES SOCIETY INC?
- The 990 for the year ended December 31, 2025 lists 11 people; 1 received compensation from the organization, the highest $97,052 (Sarah Quillen CEO, Executive Director).
- How much revenue does INTERNATIONAL LYME AND ASSOCIATED DISEASES SOCIETY INC have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $1,078,146, expenses of $1,147,113 and total assets of $477,748 at year end.
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