NPPES file of Aug 9, 2026

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.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

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

  1. Francine Mariel CastilloDermatology Physician1871233809
  2. Gabriel Castillo, LPCC, M.S.Community Health Worker1427568690
  3. Hershey CastilloCommunity Health Worker1609428671
  4. Irene CastilloAddiction (Substance Use Disorder) Counselor1346449170
  5. Isis CastilloBehavior Technician1114740503
  6. Joella Castillo, D.C., C.C.S.P.Sports Physician Chiropractor1194002477
  7. Jorge CastilloCounselor1760600498
  8. Kaitlyn CastilloStudent in an Organized Health Care Education/Training Program1851289490
  9. Karla Castillo, MFTIMarriage & Family Therapist1588996342
  10. Lindsay Castillo, B.AAddiction (Substance Use Disorder) Counselor1487903738
  11. Mariela CastilloClinical Social Worker1841729068
  12. Marissa CastilloDay Training/Habilitation Specialist1780518506
  13. Mayra CastilloSpecialist1942679857
  14. Michael CastilloCounselor1467666438
  15. Nadean CastilloBehavior Technician1912788035
  16. Oscar CastilloCounselor1457271884
  17. Samuel CastilloCommunity Health Worker1851931141
  18. Shelsie CastilloStudent in an Organized Health Care Education/Training Program1932982048
  19. Vanessa Castillo LucasCommunity Health Worker1164257531
  20. Herbert Castillo ValladaresDermatology Physician1326501743
  21. Genesis Castillo-Jimenez, RNRegistered Nurse1093640328
  22. Bonnie Castleman, OTR/LOccupational Therapist1427978030
  23. Joseph Caston, M.D.Psychiatry Physician1740324797
  24. Teresa CastonCounselor1104942150
  25. Vincent CastoroPhysical Therapist1023630530
  26. Jacob Castrejon, DCChiropractor1013679380
  27. Madalene CastrilloCommunity Health Worker1376291161
  28. Fernando Castrillon, M.A.Student in an Organized Health Care Education/Training Program1598950289
  29. Aimee Castro, OTR/LOccupational Therapist1467074807
  30. Angelica CastroMassage Therapist1144140377
  31. Anthony Castro, DDSStudent in an Organized Health Care Education/Training Program1710753116
  32. Bianca Castro, DPTPhysical Therapist1104384692
  33. Camilo Castro, PPSC SPEECH & LANGUASpeech-Language Pathologist1780517193
  34. Carmen Castro, RDNRegistered Dietitian1831937333
  35. Derek CastroMassage Therapist1063709269
  36. Estefany CastroBehavior Technician1134091630
  37. Estrellita CastroCounselor1366828998
  38. Evelyn CastroDay Training/Habilitation Specialist1700714888
  39. Gloria CastroPsychologist1427125962
  40. Hector CastroCommunity Health Worker1578242863
  41. Jade Castro, D.D.S.Student in an Organized Health Care Education/Training Program1346608882
  42. Jaylord Castro, ASWSchool Social Worker1164225884
  43. Jem CastroCounselor1164839411
  44. Joanna Castro, OTRHand Occupational Therapist1770652166
  45. Laura Castro, PSYDClinical Psychologist1376573857
  46. Maria Castro, MDStudent in an Organized Health Care Education/Training Program1235889742
  47. Mayan CastroCounselor1891120721
  48. Miriam Castro, M.D.Anesthesiology Physician1982927471
  49. Rebecca CastroSpecialist1295452506
  50. Sarina Castro, PHDPsychologist1225923980

The largest California cities

  1. Los Angeles69,537
  2. San Diego52,937
  3. Sacramento33,083
  4. San Jose20,925
  5. Fresno19,440

All of California →

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.