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 191 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. Karen CastroCase Manager/Care Coordinator1902354251
  2. Kathreen Castro, NPFamily Nurse Practitioner1043602857
  3. Kayla CastroBehavior Technician1912794991
  4. Keith CastroCase Manager/Care Coordinator1689945040
  5. Krystal Castro, MSOTOccupational Therapist1295696235
  6. Luis Castro, PAFamily Medicine Physician1891801833
  7. Margarita CastroStudent in an Organized Health Care Education/Training Program1245154970
  8. Maria Castro, SLPSpeech-Language Pathologist1467930289
  9. Marialy CastroStudent in an Organized Health Care Education/Training Program1780570465
  10. Mario Castro, CASE MANAGERCase Manager/Care Coordinator1427784065
  11. Melissa CastroMental Health Counselor1750400347
  12. Mia Castro, MS, AMFTMarriage & Family Therapist1437020740
  13. Michael Castro, M.D.Medical Oncology Physician1306834338
  14. Nancy CastroBehavior Analyst1710556329
  15. Napoleon CastroAddiction (Substance Use Disorder) Counselor1740098581
  16. Nathan Castro, LCSWMental Health Counselor1053922765
  17. Nestor Castro, DDSDentist1093915001
  18. Rebecca CastroAddiction (Substance Use Disorder) Counselor1679279624
  19. Richard CastroBehavior Technician1174104533
  20. Ritza CastroBehavior Technician1720869456
  21. Rommel CastroPhysical Therapist1043026214
  22. Rosy CastroPhysical Therapist1184581274
  23. Rudolfo Castro, LCSWClinical Social Worker1124336953
  24. Ruth CastroSocial Worker1578200416
  25. Sarah CastroMental Health Counselor1881320224
  26. Skarlet Castro, MSWClinical Social Worker1053198846
  27. Stacey Castro, BABehavior Technician1790611267
  28. Stephanie CastroBehavior Technician1104508860
  29. Steven Castro, PHYSICAL THERAPISTPhysical Therapist1114084100
  30. Thalia CastroStudent in an Organized Health Care Education/Training Program1346767571
  31. Tina Castro, LCSWClinical Social Worker1538520135
  32. Vanessa Castro, MA,MFTIMarriage & Family Therapist1275689424
  33. Vanessa CastroCase Manager/Care Coordinator1205495603
  34. Veronica CastroClinical Psychologist1053015347
  35. Veronica CastroBehavior Technician1104710987
  36. Michelle Castro ArreguinStudent in an Organized Health Care Education/Training Program1730062472
  37. Ana Castro CarranzaStudent in an Organized Health Care Education/Training Program1124774146
  38. Nicolle Castro GarciaBehavior Technician1467303529
  39. Joanna Castro GonzalezClinical Social Worker1225523160
  40. Licerio Castro Jr., MDAnesthesiology Physician1003987074
  41. Cynthia Castro-Lopez, BABehavior Technician1043838212
  42. Augustine CastronovoStudent in an Organized Health Care Education/Training Program1740908656
  43. Stacy Casucci, RDNRegistered Dietitian1043889926
  44. Lawrence CasugaSocial Worker1982462115
  45. Dunia CasulaBehavior Technician1619795499
  46. Ramona Casupang, LCSWClinical Social Worker1619262888
  47. Carolyn Caswell, MFTMarriage & Family Therapist1578603874
  48. Tzara CaswellSpeech-Language Pathologist1376109959
  49. Patricia Catala Rivera, MDFamily Medicine Physician1568919157
  50. Antonio Catalan, AABehavior Technician1720736408

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.