Nonprofit · EIN 27-0662044
INTERNATIONAL SOCIETY FOR LABORATORY HEMATOLOGY
Tax-exempt · GLENVIEW, IL 60025
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $517,511 | $768,443 | -$250,932 | $1,364,779 | $151,707 | $1,213,072 |
| December 31, 2024 | 990 | $886,449 | $748,596 | $137,853 | $1,465,236 | $80,471 | $1,384,765 |
| December 31, 2023 | 990 | $532,281 | $695,692 | -$163,411 | $1,410,616 | $168,898 | $1,241,718 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $157,242
- Program service revenue
- $326,792
- Investment income
- $6,283
- Royalties
- $27,194
- Other revenue
- $27,194
Expenses
- Grants and similar amounts paid
- $23,451
- Compensation of officers, directors and key employees
- $0
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Accounting fees
- $2,375
- Travel
- $9,515
- Program services (functional)
- $713,455
- Management and general (functional)
- $54,988
Balance sheet and other
- Total assets, start of year
- $1,465,236
- Total assets, end of year
- $1,364,779
- Total liabilities, end of year
- $151,707
- Net assets, end of year
- $1,213,072
- Publicly traded securities
- $562,039
- Net assets without donor restrictions
- $1,213,072
- Gross receipts
- $517,511
- Employees
- 0
- Volunteers
- 25
- Year formed
- 2009
- State of legal domicile
- OH
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 |
|---|---|---|---|
| Elosa Urrechaga PhD | Board Member Trustee or director | 0.5 | $0 |
| Hiromichi Matsushita MD PhD | Board Member Trustee or director | 0.5 | $0 |
| Jessica Opie MBChB MRCP | Board Member Trustee or director | 0.5 | $0 |
| Katrien Devreese MD PhD | VP Comms Trustee or director, Officer | 1 | $0 |
| Archana Agarwal MD | Board Member Trustee or director | 0.5 | $0 |
| Gina Zini MD PhD | Board Member Trustee or director | 0.5 | $0 |
| Simon Davidson FIBMS MPHIL | Board Member Trustee or director | 0.5 | $0 |
| Samia Rizk MD | Board Member Trustee or director | 0.5 | $0 |
| Jin-Yeong Han MD PhD | Board Member Trustee or director | 0.5 | $0 |
| Swati Pai MD DNB | Board Member Trustee or director | 0.5 | $0 |
| Giuseppe d'Onofrio MD | Co-Editor Trustee or director, Officer | 2 | $0 |
| Maha Othman MD MSc PhD | Board Member Trustee or director | 0.5 | $0 |
| Tracy George MD | Past President Trustee or director, Officer | 1 | $0 |
| Olga Weinberg MD | Treasurer Trustee or director, Officer | 1 | $0 |
| John Frater MD | President Trustee or director, Officer | 1 | $0 |
5 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Alexa Siddon MD | VP - Membership Trustee or director, Officer | 1 | $0 |
| Chee Wee Tan MBBS FRACP PhD | VP Education Trustee or director, Officer | 1 | $0 |
| Pierre Toulon PharmD | Board Member Trustee or director | 0.5 | $0 |
| Martha Eva Viveros PhD | Board Member Trustee or director | 0.5 | $0 |
| Ian Mackie PhD FRCPath | Co-Editor Trustee or director, Officer | 2 | $0 |
990 for the year ended December 31, 2024: 19 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Elosa Urrechaga PhD | Board Member Trustee or director | 0.5 | $0 |
| Karen Moffat BEd MSc | VP Membership Trustee or director, Officer | 1 | $0 |
| Jessica Opie MBChB MRCP | Board Member Trustee or director | 0.5 | $0 |
| Katrien Devreese MD PhD | VP Comms Trustee or director, Officer | 1 | $0 |
| Archana Agarwal MD | Board Member Trustee or director | 0.5 | $0 |
| Gina Zini MD PhD | Board Member Trustee or director | 0.5 | $0 |
| Simon Davidson FIBMS MPHIL | Board Member Trustee or director | 0.5 | $0 |
| Samia Rizk MD | Board Member Trustee or director | 0.5 | $0 |
| Jin-Yeong Han MD PhD | Board Member Trustee or director | 0.5 | $0 |
| Swati Pai MD DNB | Board Member Trustee or director | 0.5 | $0 |
| Giuseppe d'Onofrio MD | Co-Editor Trustee or director, Officer | 2 | $0 |
| Tracy George MD | Past President Trustee or director, Officer | 1 | $0 |
| Olga Weinberg MD | Treasurer Trustee or director, Officer | 1 | $0 |
| John Frater MD | President Trustee or director, Officer | 1 | $0 |
| Alexa Siddon MD | Board Member Trustee or director | 0.5 | $0 |
| Chee Wee Tan MBBS FRACP PhD | VP Education Trustee or director, Officer | 1 | $0 |
| Pierre Toulon PharmD | Board Member Trustee or director | 0.5 | $0 |
| Martha Eva Viveros PhD | Board Member Trustee or director | 0.5 | $0 |
| Ian Mackie PhD FRCPath | Co-Editor Trustee or director, Officer | 2 | $0 |
990 for the year ended December 31, 2023: 18 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Elosa Urrechaga PhD | Board Member Trustee or director | 0.5 | $0 |
| Karen Moffat BEd MSc | VP Membership Trustee or director, Officer | 1 | $0 |
| Jessica Opie MBChB MRCP | Board Member Trustee or director | 5 | $0 |
| Katrien Devreese MD PhD | VP Comms Trustee or director, Officer | 1 | $0 |
| Archana Agarwal MD | Board Member Trustee or director | 0.5 | $0 |
| Ruth Padmore MD PhD | VP - Education Trustee or director, Officer | 1 | $0 |
| Simon Davidson FIBMS MPHIL | Board Member Trustee or director | 0.5 | $0 |
| Samia Rizk MD | Board Member Trustee or director | 0.5 | $0 |
| Jin-Yeong Han MD PhD | Board Member Trustee or director | 0.5 | $0 |
| Swati Pai MD DNB | Board Member Trustee or director | 0.5 | $0 |
| Barbara De La Salle MD | Board Member Trustee or director | 0.5 | $0 |
| Tracy George MD | Past President Trustee or director, Officer | 1 | $0 |
| Olga Weinberg MD | Treasurer Trustee or director, Officer | 1 | $0 |
| John Frater MD | President Trustee or director, Officer | 1 | $0 |
| Alexa Siddon MD | Board Member Trustee or director | 0.5 | $0 |
| Chee Wee Tan MBBS FRACP PhD | Board Member Trustee or director | 0.5 | $0 |
| Pierre Toulon PharmD | Board Member Trustee or director | 0.5 | $0 |
| Martha Eva Viveros PhD | Board Member Trustee or director | 0.5 | $0 |
Address and contacts
- Address (IRS master file)
- 2111 CHESTNUT AVE STE 145, GLENVIEW, IL 60025-1609
- In care of
- % KANDICE MARCHANT
- Principal officer (990 for 2025)
- John Frater MD, 2111 Chestnut Avenue 145, Glenview, IL 60025
- Signed the 990
- Olga Weinberg MD, Treasurer
- Phone
- (847) 983-3519
- Return prepared by
- R L KEARNS CPA
Mission
The International Society for Laboratory Hematology (ISLH) is an international group of laboratory hematology professionals serving as a forum for the dissemination of new ideas and information in all of the disciplines within laboratory hematology. These include:Cellular AnalysisHemostasis and ThrombosisFlow CytometryMolecular DiagnosticsHemoglobinopathies and ThalassemiaHemolytic AnemiasPoint of Care TestingHematology InformaticsStandards and Guidelines
Program accomplishments
- Sponsored the annual international symposium. The 2025 symposium was held in Halifax, Nova Scotia, Canada during May of 2025 as well as virtually. The symposium provided a forum for the membership to obtain updated information on technological innovations in laboratory hematology. The symposium was a three day conference preceded by a one day educational workshop. Participants included approximately 700 professionals from more than 50 countries and included more than 200 presentations.Expenses $561,284 · grants $23,451 · revenue $248,188
- Developed and presented educational webinars and E-learning courses for the benefit of the membership as part of an effort to provide timely information to that membership concerning developments in the field of laboratory hematology. Education network is designed in part to familiarize pathologists with the current diagnostic workup of systemic mastocytosis (SM) and to help them to recognize the morphologic features, chose the appropriate ancillary testing (e.g., high sensitivity molecular KIT testing, flow cytometric studies, myeloid mutation testing by next-generation sequencing, etc.) and integrate clinical data to diagnose and classify SM.Expenses $120,302
- Published The International Journal of Laboratory Hematology for use by membership and interested parties. The journal provides an international forum for all new developments in the research and practice of laboratory hematology and includes invited reviews, full length original articles and correspondence.Expenses $31,869
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
- 27-0662044
- 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
- 2009
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Medical research (H038)
- Assets (IRS master file)
- $1,364,779
- Income (IRS master file)
- $517,511
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $517,511 | $768,443 | $1,364,779 | XML |
| 990 | December 2024 | $886,449 | $748,596 | $1,465,236 | XML |
| 990 | December 2023 | $532,281 | $695,692 | $1,410,616 | XML |
| 990 | December 2022 | $996,122 | $742,116 | $1,454,553 | 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 27-0662044).
Questions about INTERNATIONAL SOCIETY FOR LABORATORY HEMATOLOGY
- What is the EIN of INTERNATIONAL SOCIETY FOR LABORATORY HEMATOLOGY?
- The employer identification number (EIN) of INTERNATIONAL SOCIETY FOR LABORATORY HEMATOLOGY is 27-0662044.
- Is INTERNATIONAL SOCIETY FOR LABORATORY HEMATOLOGY tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2009.
- Are donations to INTERNATIONAL SOCIETY FOR LABORATORY HEMATOLOGY tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does INTERNATIONAL SOCIETY FOR LABORATORY HEMATOLOGY 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 LABORATORY HEMATOLOGY 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 LABORATORY HEMATOLOGY 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 LABORATORY HEMATOLOGY?
- The 990 for the year ended December 31, 2025 names John Frater MD.
- Who are the officers and directors of INTERNATIONAL SOCIETY FOR LABORATORY HEMATOLOGY?
- The 990 for the year ended December 31, 2025 lists 20 people; 0 received compensation from the organization.
- How much revenue does INTERNATIONAL SOCIETY FOR LABORATORY HEMATOLOGY have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $517,511, expenses of $768,443 and total assets of $1,364,779 at year end.
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