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 95 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. Shawn Casey, NBC-HWCHealth Educator1770104150
  2. Sheri Casey, PA-CPhysician Assistant1598274987
  3. Thomas Casey, MFTIMental Health Counselor1912130816
  4. Hercules Casian, PTPharmacy Technician1538655923
  5. Ernesto Casillas, M.D.Pulmonary Disease Physician1952832354
  6. Bartholomew Casimir, MFTIProfessional Counselor1164690558
  7. Sherylee CaspellanRegistered Nurse1396196614
  8. Mollie Casper, OTR/LOccupational Therapist1093564031
  9. Cecilia CasquinoCommunity Health Worker1386265908
  10. Marla Cass, MA, LMFTMarriage & Family Therapist1518411032
  11. Mary Cassel, MFTMarriage & Family Therapist1578767257
  12. Arianna Cassidy, MDObstetrics & Gynecology Physician1902268923
  13. June Cassidy, MFT, REATMarriage & Family Therapist1295227080
  14. Patrick CassidyCounselor1396173993
  15. Trisha Cassidy, LCSWSocial Worker1275606451
  16. Marca Cassity, IMFTMental Health Counselor1477803138
  17. Lydia Cassorla, M.D.Anesthesiology Physician1417904525
  18. Daniel Castagna, DDSDentist1235590050
  19. Alba Castaneda, LPCCProfessional Counselor1417478256
  20. Bleu CastanedaHealth Educator1699571570
  21. Glenda CastanedaLicensed Vocational Nurse1962122218
  22. Kathye Castaneda, M.S., CCC-SLPSpeech-Language Pathologist1407124308
  23. Mark CastanedaMarriage & Family Therapist1164831400
  24. Rebecca Castaneda, DDSProsthodontics1215134028
  25. Roxana CastanedaCommunity Health Worker1740661321
  26. Kelly Castel, B.A.Case Manager/Care Coordinator1871866079
  27. Angel Castelan-ValladaresDay Training/Habilitation Specialist1922966274
  28. Christina Castelein, RN, MSNFamily Nurse Practitioner1952712481
  29. Cristian CastellanosAddiction (Substance Use Disorder) Counselor1952966616
  30. Erick Castellanos, MDAnesthesiology Physician1619617362
  31. Erika CastellanosCommunity Health Worker1578243168
  32. Ivonne CastellanosFamily Nurse Practitioner1467210104
  33. Jessica CastellanosCommunity Health Worker1003308875
  34. Maria Castellanos, M.D.Pediatrics Physician1881013795
  35. Mia CastellanosBehavior Technician1548135163
  36. Nykole CastellanosPeer Specialist1336963107
  37. Gabriela Castellanos RumboCommunity Health Worker1053123307
  38. Claudia Castellanos-HudginsStudent in an Organized Health Care Education/Training Program1093201857
  39. Amelia CastelliSpecialist1700208790
  40. Donna Castelli, M.S.Marriage & Family Therapist1508924960
  41. John CastelliSpecialist1598187585
  42. Mafe Castigador, LVNLicensed Practical Nurse1215735477
  43. Cecelia Castignani, LEPPsychologist1194406439
  44. Shelby Castile, MFTMarriage & Family Therapist1043410889
  45. Ana Castillo, LCSWClinical Social Worker1124365465
  46. Brittany CastilloOccupational Therapist1427607175
  47. Caroline Castillo, M.D.Family Medicine Physician1114217742
  48. Danielle CastilloBehavior Technician1801398755
  49. Deyanira CastilloBehavior Technician1154970523
  50. Elizabeth CastilloCase Manager/Care Coordinator1831574318

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.