| Okizu FoundationEIN 68-0291178 | Health | CA | $2,017,839Small | 86.23 |
| Oklahoma Medical Research FoundationEIN 73-0580274 | Health | OK | $75,113,337Large | 93.94 |
| Oncology Nursing Society FoundationEIN 25-1410081 | Health | PA | $1,399,783Small | 88.19 |
| One HeartlandEIN 39-1763115 | Health | MN | $1,622,396Small | 85.75 |
| Operation AccessEIN 94-3180356 | Health | CA | $1,466,203Small | 86.33 |
| Organ Donation And Transplant Association Of AmericaEIN 30-0339531 | Health | FL | $117,858Small | 26.93 |
| Organization for Autism ResearchEIN 54-2062167 | Health | VA | $1,326,919Small | 95.05 |
| Orthopaedic Research and Education FoundationEIN 36-6009467 | Health | IL | $5,165,708Mid-sized | 69.21 |
| Osteogenesis Imperfecta FoundationEIN 23-7076021 | Health | MD | $1,948,774Small | 93.31 |
| Ovarian Cancer Research AllianceEIN 13-3806788 | Health | NY | $10,805,177Mid-sized | 93.28 |
| Overlook FoundationEIN 51-0194054 | Health | NJ | $6,419,341Mid-sized | 84.96 |
| Pancreatic Cancer Action NetworkEIN 33-0841281 | Health | CA | $32,108,869Large | 93.02 |
| Parent Project Muscular DystrophyEIN 31-1405490 | Health | NJ | $9,102,759Mid-sized | 93.98 |
| Parkinson's FoundationEIN 13-1866796 | Health | NY | $26,963,779Large | 90.88 |
| Parkinson's Institute and Clinical CenterEIN 94-3061594 | Health | CA | $8,641,345Mid-sized | 75.52 |
| Parkinson's Unity WalkEIN 13-3842415 | Health | NJ | $2,602,836Small | 65.64 |
| Partnership for Drug-Free KidsEIN 13-3413627 | Health | NY | $7,484,044Mid-sized | 90.81 |
| Pathways.orgEIN 52-2456469 | Health | IL | $3,272,387Small | 82.84 |
| Patient Advocate FoundationEIN 54-1806317 | Health | VA | $186,165,629Large | 96.66 |
| Patient Services IncorporatedEIN 54-1596178 | Health | VA | $110,091,811Large | 92.22 |
| PearlPoint Cancer SupportEIN 58-1747771 | Health | TN | $949,551Small | 69.42 |
| Pediatric Brain Tumor FoundationEIN 58-1966822 | Health | NC | $5,985,760Mid-sized | 80.76 |
| Pediatric Cancer Research FoundationEIN 95-3772528 | Health | CA | $2,492,062Small | 86.97 |
| Pegasus Therapeutic RidingEIN 06-0932894 | Health | NY | $1,313,219Small | 65.88 |
| Pennsylvania Adult & Teen ChallengeEIN 23-1695361 | Health | PA | $6,998,418Mid-sized | 91.03 |
| Pet PartnersEIN 91-1158281 | Health | WA | $3,030,690Small | 87.24 |
| Philadelphia Ronald McDonald HouseEIN 23-7377505 | Health | PA | $4,946,474Mid-sized | 95.67 |
| Physician Health ServicesEIN 22-3234975 | Health | MA | $1,721,046Small | 86.24 |
| PKD FoundationEIN 43-1266906 | Health | MO | $6,120,336Mid-sized | 85.37 |
| Planned Parenthood Association of UtahEIN 87-0288909 | Health | UT | $9,116,958Mid-sized | 85.51 |
| Planned Parenthood California Central CoastEIN 95-2319356 | Health | CA | $15,587,708Large | 86.56 |
| Planned Parenthood Federation of AmericaEIN 13-1644147 | Health | NY | $317,843,167Large | 92.74 |
| Planned Parenthood Great PlainsEIN 44-0565390 | Health | KS | $6,028,411Mid-sized | 86.23 |
| Planned Parenthood Gulf CoastEIN 74-1100163 | Health | TX | $21,354,440Large | 87.28 |
| Planned Parenthood Hudson PeconicEIN 11-2454790 | Health | NY | $18,935,544Large | 84.44 |
| Planned Parenthood League of MassachusettsEIN 04-2698497 | Health | MA | $21,115,228Large | 89.35 |
| Planned Parenthood Los AngelesEIN 95-2408623 | Health | CA | $60,666,128Large | 85.17 |
| Planned Parenthood Mar MonteEIN 94-1583439 | Health | CA | $94,167,698Large | 88.68 |
| Planned Parenthood Minnesota, North Dakota, South DakotaEIN 41-0948382 | Health | MN | $43,739,711Large | 84.07 |
| Planned Parenthood of IllinoisEIN 36-2170901 | Health | IL | $28,246,958Large | 88.94 |
| Planned Parenthood of MarylandEIN 52-0607930 | Health | MD | $11,831,966Mid-sized | 87.54 |
| Planned Parenthood of Metropolitan Washington, DCEIN 53-0204621 | Health | DC | $11,025,180Mid-sized | 81.97 |
| Planned Parenthood of New York CityEIN 13-2621497 | Health | NY | $51,515,907Large | 92.72 |
| Planned Parenthood of Northern New EnglandEIN 03-0222941 | Health | VT | $22,044,666Large | 89.28 |
| Planned Parenthood of Orange and San Bernardino CountiesEIN 95-6152773 | Health | CA | $50,359,148Large | 91.50 |
| Planned Parenthood of South, East and North FloridaEIN 59-1391115 | Health | FL | $15,467,503Large | 89.17 |
| Planned Parenthood of Southern New EnglandEIN 06-0263565 | Health | CT | $32,788,894Large | 87.46 |
| Planned Parenthood of Southwest & Central FloridaEIN 59-1274328 | Health | FL | $16,643,546Large | 95.47 |
| Planned Parenthood of Tennessee and North MississippiEIN 62-6050064 | Health | TN | $5,057,898Mid-sized | 78.86 |
| Planned Parenthood of the Great Northwest and the Hawaiian IslandsEIN 91-0686012 | Health | WA | $47,603,788Large | 82.00 |
| Planned Parenthood of the Southern Finger LakesEIN 16-0953368 | Health | NY | $6,862,987Mid-sized | 83.77 |
| Planned Parenthood of Western PennsylvaniaEIN 25-0965474 | Health | PA | $5,523,700Mid-sized | 91.35 |
| Planned Parenthood of WisconsinEIN 39-0863391 | Health | WI | $27,521,749Large | 81.78 |
| Planned Parenthood SoutheastEIN 58-6045874 | Health | GA | $7,324,530Mid-sized | 81.42 |
| Planned Parenthood Southeastern PennsylvaniaEIN 23-1352509 | Health | PA | $18,383,155Large | 86.18 |
| Population CouncilEIN 13-1687001 | Health | NY | $85,432,557Large | 86.68 |
| Prader-Willi Syndrome Association (USA)EIN 41-1306908 | Health | FL | $1,917,524Small | 84.42 |
| Pregnancy Decision Health CentersEIN 31-1002913 | Health | OH | $1,362,244Small | 80.85 |
| Pregnancy Resource CenterEIN 38-2591608 | Health | MI | $2,042,964Small | 83.44 |
| Presbyterian Medical Care MissionEIN 75-1910600 | Health | TX | $8,735,222Mid-sized | 89.48 |