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 188 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. Aileen Castillo, NPFamily Nurse Practitioner1265659056
  2. Alejandra CastilloCase Manager/Care Coordinator1992170534
  3. Alexis CastilloClinical Social Worker1467906214
  4. Alexis CastilloBehavior Technician1194417618
  5. Alondra CastilloBehavior Technician1992445670
  6. Angela CastilloAddiction (Substance Use Disorder) Counselor1306602487
  7. Angela CastilloAssistant Behavior Analyst1750235248
  8. Annadi CastilloMental Health Counselor1407308315
  9. Arely CastilloRehabilitation Practitioner1689186751
  10. Ariana CastilloCase Manager/Care Coordinator1154819175
  11. Arturo Castillo, PACPhysician Assistant1073820528
  12. Carina Castillo, LMFTMarriage & Family Therapist1972034551
  13. Carlos CastilloCase Manager/Care Coordinator1811829922
  14. Casandra CastilloBehavior Technician1720669187
  15. Caylie CastilloClinical Social Worker1598503724
  16. Cecilia CastilloBehavior Technician1588481964
  17. Christine Castillo, MSW INTERNRehabilitation Practitioner1629378989
  18. Cynthia Castillo, LVNLicensed Vocational Nurse1053654160
  19. Dulce CastilloBehavior Technician1740033919
  20. Elizabeth Castillo, PHNCase Management Registered Nurse1578840906
  21. Emeli CastilloStudent in an Organized Health Care Education/Training Program1699321059
  22. Emerson CastilloCounselor1326663949
  23. Emily CastilloRehabilitation Practitioner1508649146
  24. Enrico Castillo, M.D., M.S.H.P.M.Psychiatry Physician1710204029
  25. Erick Castillo, M.D., M.P.HStudent in an Organized Health Care Education/Training Program1891237467
  26. Erwin CastilloBehavior Technician1639873458
  27. Evelyn CastilloCase Manager/Care Coordinator1982963963
  28. Flor CastilloBehavior Technician1285464776
  29. Gabriel CastilloCommunity Health Worker1184452237
  30. Guadalupe CastilloStudent in an Organized Health Care Education/Training Program1104705912
  31. Hector Castillo, M.D.Specialist1659366136
  32. Helena Castillo, PPSCClinical Social Worker1750568671
  33. Isaac CastilloStudent in an Organized Health Care Education/Training Program1851990543
  34. Isabel CastilloStudent in an Organized Health Care Education/Training Program1922949007
  35. Jackelin CastilloRehabilitation Practitioner1235762824
  36. Jed Castillo, M.D.Surgery Physician1801275920
  37. Jennifer CastilloAmbulatory Care Registered Nurse1831619584
  38. Jessica CastilloCase Manager/Care Coordinator1265064158
  39. Jessica CastilloDay Training/Habilitation Specialist1588547012
  40. Jocelyn CastilloRehabilitation Practitioner1902478134
  41. Joel CastilloDay Training/Habilitation Specialist1851133979
  42. Jonah CastilloBehavior Technician1659119238
  43. Jonathan Castillo, MSSASocial Worker1215170592
  44. Katherine CastilloClinical Social Worker1730792060
  45. Kaya CastilloBehavior Technician1972200905
  46. Kaylyn CastilloCase Manager/Care Coordinator1255006656
  47. Kelly CastilloBehavior Technician1891451340
  48. Kelvin CastilloBehavior Technician1598634255
  49. Kiersten CastilloBehavior Technician1477437226
  50. Ligaya CastilloNurse Practitioner1003940503

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.