| Blood Cancer United IncWashington | Form 990 | $358,698,504FY2025 |
| American College of Cardiology FoundationWashington | Form 990 | $125,831,256FY2024 |
| American Society of Hematology IncWashington | Form 990 | $112,402,449FY2025 |
| Optical Society of America IncWashington | Form 990 | $61,827,324FY2024 |
| Autism Speaks IncWashington | Form 990 | $28,799,237FY2025 |
| Endocrine SocietyWashington | Form 990 | $27,332,119FY2024 |
| Food & Friends IncWashington | Form 990 | $25,211,252FY2025 |
| Lupus Foundation of America IncWashington | Form 990 | $14,997,967FY2025 |
| Acog FoundationWashington | Form 990 | $13,246,929FY2024 |
| GO2 Foundation for Lung CancerWashington | Form 990 | $11,982,150FY2025 |
| Equal Access InternationalWashington | Form 990 | $11,460,639FY2024 |
| Society for Maternal-Fetal MedicineWashington | Form 990 | $10,346,279FY2025 |
| National Minority AIDS Council Dba AIDS Programs of the NationalWashington | Form 990 | $9,792,777FY2024 |
| Childhood Arthritis & Rheumatology Research AllianceWashington | Form 990 | $9,591,717FY2024 |
| Pulmonary Hypertension Association IncWashington | Form 990 | $8,460,561FY2024 |
| Everylife Foundation for Rare DiseasesWashington | Form 990 | $7,526,366FY2025 |
| Global GenesWashington | Form 990 | $7,145,531FY2024 |
| Association of Black CardiologistsWashington | Form 990 | $4,868,746FY2024 |
| Personal Care Products Council FoundationWashington | Form 990 | $3,844,040FY2024 |
| The Tiger Lily Foundation IncWashington | Form 990 | $3,053,076FY2024 |
| King Hussein Cancer Foundation USA IncWashington | Form 990 | $2,584,317FY2024 |
| Art of Living Health and Education TrustWashington | Form 990 | $2,545,433FY2024 |
| Mesothelioma Applied Research Foundation IncWashington | Form 990 | $2,531,496FY2025 |
| Prevention of Blindness Society of Metropolitan Washington IncWashington | Form 990 | $2,240,399FY2025 |
| Personalized Medicine CoalitionWashington | Form 990 | $2,099,580FY2025 |
| National Association of Councils on Developmental DisabilitiesWashington | Form 990 | $2,074,472FY2025 |
| Autistic Self Advocacy NetworkWashington | Form 990 | $1,755,689FY2025 |
| International Cancer Expert Corps IncWashington | Form 990 | $1,508,374FY2024 |
| Special Operations Medical Association IncWashington | Form 990 | $1,342,389FY2024 |
| Friends of the Global Fight Against AIDS Tuberculosis and MalariaWashington | Form 990 | $1,256,800FY2024 |
| IASWashington | Form 990 | $1,235,346FY2025 |
| American Institute for Medical and Bioligical EngineeringWashington | Form 990 | $1,221,640FY2024 |
| American Academy of HIV Medicine FoundationWashington | Form 990 | $1,046,383FY2024 |
| Wishes for ElliottWashington | Form 990 | $902,175FY2024 |
| Global Colon Cancer AssociationWashington | Form 990 | $888,276FY2024 |
| International Atherosclerosis SocietyWashington | Form 990 | $569,686FY2024 |
| National Forum for Heart DiseaseWashington | Form 990 | $528,898FY2024 |
| Paralyzed Veterans of America Spinal Cord Injury Education and TWashington | Form 990 | $480,278FY2025 |
| Heart Valve Voice UsWashington | Form 990 | $233,521FY2024 |
| Gail Bleach Vision Research Foundation IncWashington | Form 990 | $212,883FY2024 |
| Women in NephrologyWashington | Form 990-EZ | $190,907FY2025 |
| American Deafness & Rehabilitation AssociationWashington | Form 990-EZ | $156,680FY2026 |
| DC PeersWashington | Form 990-EZ | $153,978FY2025 |
| Rheumatism Society of the District of ColumbiaWashington | Form 990-EZ | $131,052FY2025 |
| Association of Minority Health Professions Schools IncWashington | Form 990-EZ | $121,743FY2025 |
| Undiagnosed Diseases Network FoundationWashington | Form 990-EZ | $120,373FY2025 |
| Kids V CancerWashington | Form 990-N | No figure |
| DeafcyberconWashington | Form 990-N | No figure |
| International Community of Women Living with HIV & AIDS-Na RegionWashington | Form 990-N | No figure |
| United Spinal Association IncWashington | Form 990-N | No figure |