NPPES file of Aug 9, 2026

Doctors and health care providers in Los Angeles, CA

69,537 individual NPPES records list a practice address in Los Angeles, 1st of 812 California cities. The largest group is students in training: 6,770, 10% of the city's records, against 4% across California. Page 190 of 1,391.

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

The 8 largest groups in Los Angeles

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Los Angeles in California

  • Rank in California1st of 812 cities by records
  • Share of the state7.2% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups23.8% of all records
  • Students in training rank1st of the 10 California cities with the most

Compared with California as a whole, Los Angeles has 2.3× the state's share of student in an organized health care education/training program records and 0.40× its share of behavior technician records.

Providers in Los Angeles, alphabetically

  1. Lindsay CastleberrySpeech-Language Pathologist1093268450
  2. Joaquin CastorSocial Worker1477684504
  3. Genessis CastorenaPhysician Assistant1306518972
  4. Giselle CastorenaBehavior Technician1679300198
  5. Jessica CastorenaSocial Worker1740941277
  6. Maria CastorenaRegistered Nurse1083248801
  7. Marisol Castorena, B.SCase Manager/Care Coordinator1962892729
  8. Leeann Castorena LewisStudent in an Organized Health Care Education/Training Program1013337005
  9. Baneza CastrejonBehavior Technician1932859089
  10. Jacqueline CastrejonBehavior Technician1215884184
  11. Stephanie CastrejonBehavior Analyst1134862980
  12. Gabriela Castrejon NavaClinical Social Worker1780122770
  13. Corina CastrellonRehabilitation Practitioner1508283524
  14. Richard Castriotta, M.D.Pulmonary Disease Physician1316971245
  15. Alexandra CastroBehavior Technician1154079689
  16. Aliza Marie CastroPhysical Therapist1730881764
  17. Alma CastroBehavior Technician1801789201
  18. Andrea CastroRehabilitation Practitioner1104329606
  19. Anllely CastroClinical Social Worker1780103630
  20. Arturo Castro, PAPhysician Assistant1699867085
  21. Ashley Castro, DOFamily Medicine Physician1356823082
  22. Carleen Kayle Castro, MDStudent in an Organized Health Care Education/Training Program1982547758
  23. Carol Castro, MDInternal Medicine Physician1740770072
  24. Cristina Castro, PHARMDPharmacist1205225992
  25. Cristina CastroAssistant Behavior Analyst1699320754
  26. Crystal CastroRehabilitation Practitioner1396396867
  27. Diana CastroStudent in an Organized Health Care Education/Training Program1437983954
  28. Diana CastroBehavior Technician1598622326
  29. Edward Castro, M.D.Family Medicine Physician1750330817
  30. Elena CastroNurse Practitioner1326445560
  31. Elizabeth CastroAddiction (Substance Use Disorder) Counselor1205018702
  32. Emily Castro, BSAthletic Trainer1174234033
  33. Enrique CastroDay Training/Habilitation Specialist1841904927
  34. Erica Castro, LVNAddiction (Substance Use Disorder) Counselor1356631378
  35. Erica CastroCase Manager/Care Coordinator1326535725
  36. Geris CastroAddiction (Substance Use Disorder) Counselor1407717812
  37. Gia CastroSpeech-Language Assistant1023771938
  38. Guadalupe CastroBehavior Analyst1780228916
  39. Hector CastroRehabilitation Practitioner1760017354
  40. Hector CastroBehavior Technician1700610599
  41. Jamie Castro, DMDGeneral Practice Dentistry1245033380
  42. Janice Castro, PHDPsychologist1942726062
  43. Jasmine CastroBehavior Technician1043886013
  44. Jesus CastroBehavior Technician1114884004
  45. John CastroRehabilitation Practitioner1881871655
  46. Joselyn Castro, SLP-CFSpeech-Language Pathologist1083148548
  47. Juancarlos CastroBehavior Technician1386434215
  48. Judy CastroMental Health Counselor1568609584
  49. Julie Castro, MDStudent in an Organized Health Care Education/Training Program1477497915
  50. Kaitlyn CastroBehavior Technician1528934635

The largest California cities

  1. San Diego52,937
  2. San Francisco38,143
  3. Sacramento33,083
  4. San Jose20,925
  5. Fresno19,440

All of California →

How to read this directory

Los Angeles, California appears in the CMS National Plan and Provider Enumeration System with 69,537 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 Los Angeles - 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 Los Angeles 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 Los Angeles is weighted toward Student in an Organized Health Care Education/Training Program (6,770 clinicians, followed by Behavior Technician with 4,965 and Clinical Social Worker with 4,806). 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, Los Angeles reports roughly 178.5 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 Los Angeles practice address, a coverage gap Los Angeles patients typically fill by traveling to a larger nearby hub.

For Los Angeles 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 Los Angeles, CA?

There are 69,537 registered healthcare providers in Los Angeles, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Los Angeles?

The most common specialties in Los Angeles are Student in an Organized Health Care Education/Training Program, Behavior Technician, Clinical Social Worker, Marriage & Family Therapist, Case Manager/Care Coordinator. Student in an Organized Health Care Education/Training Program has the most providers with 6,770.

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.