| Cystic Fibrosis FoundationBethesda | Form 990 | $355,798,320FY2024 |
| Chase Brexton Health Services IncBaltimore | Form 990 | $172,818,534FY2025 |
| Brightfocus FoundationClarksburg | Form 990 | $63,423,924FY2025 |
| HJF Medical Research International IncBethesda | Form 990 | $43,581,270FY2025 |
| University of Maryland Pediatric Associates P ABaltimore | Form 990 | $39,133,919FY2025 |
| American Gastroenterological Association Institute IncBethesda | Form 990 | $32,251,929FY2025 |
| Unified Community Connections IncSparks | Form 990 | $31,344,371FY2025 |
| Easter Seals Serving DC-MD-VA IncSilver Spring | Form 990 | $30,880,621FY2025 |
| National Federation of the Blind IncBaltimore | Form 990 | $24,397,357FY2025 |
| American Association of Immunologists IncRockville | Form 990 | $20,327,063FY2025 |
| Identity IncGaithersburg | Form 990 | $20,242,318FY2025 |
| Epilepsy Foundation of AmericaBowie | Form 990 | $16,178,770FY2025 |
| Association of Community Cancer CentersRockville | Form 990 | $15,625,626FY2025 |
| University of Maryland Eye Association PaBaltimore | Form 990 | $10,975,634FY2025 |
| Abilities Network IncTowson | Form 990 | $10,130,381FY2025 |
| National Tuberous Sclerosis Association IncSilver Spring | Form 990 | $9,807,320FY2025 |
| United Needs and Abilities IncSalisbury | Form 990 | $8,034,741FY2025 |
| Head Injury Rehabilitation and Referral Services IncRockville | Form 990 | $7,240,306FY2025 |
| Association of Immunization ManagersRockville | Form 990 | $6,009,882FY2025 |
| Curesearch for Childrens CancerBethesda | Form 990 | $4,967,108FY2024 |
| Association of Military Surgeons of the U SGaithersburg | Form 990 | $4,708,717FY2025 |
| Hydrocephalus Association IncorporatedNorth Bethesda | Form 990 | $4,383,244FY2025 |
| American Uro-Gynecologic SocietySilver Spring | Form 990 | $3,837,868FY2025 |
| Ulman Foundation IncBaltimore | Form 990 | $3,691,650FY2024 |
| Project Als IncHuntingtown | Form 990 | $3,298,805FY2025 |
| American Society for Colposcopy & Cervical PathologyClarksburg | Form 990 | $2,886,051FY2025 |
| Gi Quality Improvement Consortium LtdNorth Bethesda | Form 990 | $2,628,054FY2024 |
| T O U C H Therapy IncAnnapolis | Form 990 | $2,563,215FY2024 |
| National Coalition for Cancer SurvivorshipSilver Spring | Form 990 | $1,981,023FY2024 |
| Cool Kids Campaign Foundation IncTowson | Form 990 | $1,903,595FY2025 |
| Adult Congenital Heart Association IncColumbia | Form 990 | $1,858,947FY2025 |
| John W Brick Mental Health Foundation IncTimonium | Form 990 | $1,496,942FY2024 |
| Hope Connections for Cancer Support IncBethesda | Form 990 | $1,451,336FY2025 |
| Pathfinders IncHunt Valley | Form 990 | $1,380,297FY2025 |
| Genetic Alliance IncDamascus | Form 990 | $1,350,741FY2025 |
| Daydream Sunshine InitiativeBowie | Form 990 | $1,267,093FY2025 |
| Parkinson Foundation of the National Capital AreaOlney | Form 990 | $1,201,164FY2025 |
| Society of Military Orthopaedic SurgeonsTowson | Form 990 | $1,196,153FY2024 |
| Applied Epi IncorporatedSevern | Form 990 | $1,043,994FY2024 |
| Autism Society of Maryland IncColumbia | Form 990 | $886,565FY2024 |
| Deafnet Association IncHagerstown | Form 990 | $810,244FY2024 |
| Diabetes Action Research and Education FoundationBethesda | Form 990 | $787,995FY2025 |
| United Porphyrias AssociationBethesda | Form 990 | $752,353FY2024 |
| National Center for HomoeopathyClarksburg | Form 990 | $701,497FY2025 |
| Pxe International IncDamascus | Form 990 | $692,622FY2025 |
| Therapies for Inherited Neuropathies IncBaltimore | Form 990 | $661,134FY2025 |
| Esophageal Cancer Action Network IncStevenson | Form 990 | $617,412FY2024 |
| Mog Project IncGaithersburg | Form 990 | $595,048FY2025 |
| Breast Cancer Awareness Cumberland Valley IncHagerstown | Form 990 | $570,919FY2024 |
| Conference of Educational Administrators of Schools and ProgMount Rainier | Form 990 | $541,787FY2026 |