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 186 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. Arianna CastanedaBehavior Technician1104694223
  2. Ashley CastanedaBehavior Technician1245091677
  3. Carissa CastanedaLicensed Vocational Nurse1881547040
  4. Carmen Castaneda, MSWMental Health Counselor1114470069
  5. Carolina Castaneda, DDSDentist1770625337
  6. Christian Castaneda, MSWMental Health Counselor1801120407
  7. Cynthia CastanedaBehavior Analyst1669075164
  8. Daniel Castaneda, MD, MPHStudent in an Organized Health Care Education/Training Program1316640782
  9. Debbie CastanedaMarriage & Family Therapist1972192367
  10. Diana CastanedaDay Training/Habilitation Specialist1710785423
  11. Diego CastanedaCase Manager/Care Coordinator1487010989
  12. Fortino Castaneda, M.D.Diagnostic Radiology Physician1568414175
  13. Gilbert CastanedaStudent in an Organized Health Care Education/Training Program1316582737
  14. Irma Castaneda, PH.D.Clinical Social Worker1154402170
  15. Jessica Castaneda, LCSWClinical Social Worker1588341069
  16. Jessica CastanedaBehavior Technician1275354375
  17. Jonathan CastanedaAddiction (Substance Use Disorder) Counselor1639619885
  18. Jonathan CastanedaCase Manager/Care Coordinator1730685744
  19. Julie Castaneda, RNRegistered Nurse1902562200
  20. Maira CastanedaMarriage & Family Therapist1871749739
  21. Melissa CastanedaClinical Social Worker1508292822
  22. Nicholas CastanedaBehavior Technician1558139675
  23. Oscar Castaneda, SWSocial Worker1699533687
  24. Patricia Castaneda, LVNLicensed Vocational Nurse1932306818
  25. Rebeca CastanedaStudent in an Organized Health Care Education/Training Program1093683997
  26. Sandee Castaneda, AUDAudiologist-Hearing Aid Fitter1316894157
  27. Sandra Castaneda, BACase Manager/Care Coordinator1295369734
  28. Veronica Castaneda, BA IN PSYCHOLOGYBehavior Analyst1699005934
  29. Viridiana CastanedaBehavior Technician1598460016
  30. Yessica CastanedaClinical Social Worker1912543455
  31. Yetseng CastanedaCommunity Health Worker1245800242
  32. Emmanuel Castaneda HernandezLicensed Psychiatric Technician1548067127
  33. Mario Castaneda Martinez, MSWClinical Social Worker1447928536
  34. Monica Castaneda-GarciaCommunity Health Worker1659780419
  35. Estella CastanedesLicensed Vocational Nurse1235598384
  36. Nhi Castano, MDAnesthesiology Physician1063040061
  37. Maria Castanon, CRT, RRT-SDSRegistered Respiratory Therapist1801376298
  38. Reese CastanonStudent in an Organized Health Care Education/Training Program1386501781
  39. Ruth CastanonBehavior Analyst1376409060
  40. Sofi CastanonStudent in an Organized Health Care Education/Training Program1568245512
  41. Margarita Castanon Herrera, B.A.Community Health Worker1912333535
  42. Rito Castanon-Hill, M.D.Emergency Medicine Physician1740397215
  43. Claribel CastanosStudent in an Organized Health Care Education/Training Program1366079451
  44. Paola Castanos, LCSWClinical Social Worker1952678260
  45. Jesus Castanos MontesLicensed Vocational Nurse1710641980
  46. Jami Castel, CLEDoula1255264651
  47. Stephen CastelMental Health Counselor1568353472
  48. Stephany CastelanBehavior Technician1427789312
  49. Phillip CastellanoAddiction (Substance Use Disorder) Counselor1023520400
  50. Guilherme Castellano Argenta, DDSGeneral Practice Dentistry1710546023

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.