Doctors and health care providers in San Francisco, CA
38,143 individual NPPES records list a practice address in San Francisco, 3rd of 812 California cities. The largest group is students in training: 3,035, 8% of the city's records, against 4% across California. Page 96 of 763.
The 8 largest groups in San Francisco
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
San Francisco in California
- Rank in California3rd of 812 cities by records
- Share of the state3.9% of California's records
- Specialties present25 or more taxonomy codes
- Top three groups19% of all records
- Students in training rank2nd of the 10 California cities with the most
Compared with California as a whole, San Francisco has 3.8× the state's share of community health worker records and 0.15× its share of behavior technician records.
Providers in San Francisco, alphabetically
- Francine Mariel CastilloDermatology Physician1871233809
- Gabriel Castillo, LPCC, M.S.Community Health Worker1427568690
- Hershey CastilloCommunity Health Worker1609428671
- Irene CastilloAddiction (Substance Use Disorder) Counselor1346449170
- Isis CastilloBehavior Technician1114740503
- Joella Castillo, D.C., C.C.S.P.Sports Physician Chiropractor1194002477
- Jorge CastilloCounselor1760600498
- Kaitlyn CastilloStudent in an Organized Health Care Education/Training Program1851289490
- Karla Castillo, MFTIMarriage & Family Therapist1588996342
- Lindsay Castillo, B.AAddiction (Substance Use Disorder) Counselor1487903738
- Mariela CastilloClinical Social Worker1841729068
- Marissa CastilloDay Training/Habilitation Specialist1780518506
- Mayra CastilloSpecialist1942679857
- Michael CastilloCounselor1467666438
- Nadean CastilloBehavior Technician1912788035
- Oscar CastilloCounselor1457271884
- Samuel CastilloCommunity Health Worker1851931141
- Shelsie CastilloStudent in an Organized Health Care Education/Training Program1932982048
- Vanessa Castillo LucasCommunity Health Worker1164257531
- Herbert Castillo ValladaresDermatology Physician1326501743
- Genesis Castillo-Jimenez, RNRegistered Nurse1093640328
- Bonnie Castleman, OTR/LOccupational Therapist1427978030
- Joseph Caston, M.D.Psychiatry Physician1740324797
- Teresa CastonCounselor1104942150
- Vincent CastoroPhysical Therapist1023630530
- Jacob Castrejon, DCChiropractor1013679380
- Madalene CastrilloCommunity Health Worker1376291161
- Fernando Castrillon, M.A.Student in an Organized Health Care Education/Training Program1598950289
- Aimee Castro, OTR/LOccupational Therapist1467074807
- Angelica CastroMassage Therapist1144140377
- Anthony Castro, DDSStudent in an Organized Health Care Education/Training Program1710753116
- Bianca Castro, DPTPhysical Therapist1104384692
- Camilo Castro, PPSC SPEECH & LANGUASpeech-Language Pathologist1780517193
- Carmen Castro, RDNRegistered Dietitian1831937333
- Derek CastroMassage Therapist1063709269
- Estefany CastroBehavior Technician1134091630
- Estrellita CastroCounselor1366828998
- Evelyn CastroDay Training/Habilitation Specialist1700714888
- Gloria CastroPsychologist1427125962
- Hector CastroCommunity Health Worker1578242863
- Jade Castro, D.D.S.Student in an Organized Health Care Education/Training Program1346608882
- Jaylord Castro, ASWSchool Social Worker1164225884
- Jem CastroCounselor1164839411
- Joanna Castro, OTRHand Occupational Therapist1770652166
- Laura Castro, PSYDClinical Psychologist1376573857
- Maria Castro, MDStudent in an Organized Health Care Education/Training Program1235889742
- Mayan CastroCounselor1891120721
- Miriam Castro, M.D.Anesthesiology Physician1982927471
- Rebecca CastroSpecialist1295452506
- Sarina Castro, PHDPsychologist1225923980
The largest California cities
- Los Angeles69,537
- San Diego52,937
- Sacramento33,083
- San Jose20,925
- Fresno19,440
How to read this directory
San Francisco, California appears in the CMS National Plan and Provider Enumeration System with 38,143 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in San Francisco - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a San Francisco practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.
The provider mix in San Francisco is weighted toward Student in an Organized Health Care Education/Training Program (3,035 clinicians, followed by Marriage & Family Therapist with 2,542 and Community Health Worker with 1,674). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to California's population, San Francisco reports roughly 97.9 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.
Of California's most common specialties, Behavior Analyst is the most prominent one with no provider currently listing a San Francisco practice address, a coverage gap San Francisco patients typically fill by traveling to a larger nearby hub.
For San Francisco patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.
For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.
Common questions
How many doctors are in San Francisco, CA?
There are 38,143 registered healthcare providers in San Francisco, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.
What are the most common medical specialties in San Francisco?
The most common specialties in San Francisco are Student in an Organized Health Care Education/Training Program, Marriage & Family Therapist, Community Health Worker, Counselor, Clinical Social Worker. Student in an Organized Health Care Education/Training Program has the most providers with 3,035.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.