NPPES file of Aug 9, 2026

Doctors and health care providers in Santa Ana, CA

8,904 individual NPPES records list a practice address in Santa Ana, 18th of 812 California cities. The largest group is behavior technician: 1,625, 18% of the city's records, against 18% across California. Page 25 of 179.

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

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

The 8 largest groups in Santa Ana

  1. Behavior Technician1,625
  2. Mental Health Counselor684
  3. Marriage & Family Therapist678
  4. Clinical Social Worker433
  5. Addiction (Substance Use Disorder) Counselor407
  6. Registered Nurse281
  7. Counselor247
  8. Social Worker216

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

Santa Ana in California

  • Rank in California18th of 812 cities by records
  • Share of the state0.9% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups33.5% of all records

Compared with California as a whole, Santa Ana has 12.5× the state's share of community health registered nurse records and 0.50× its share of student in an organized health care education/training program records.

Providers in Santa Ana, alphabetically

  1. Hilda Castellanos, BAMental Health Counselor1851532048
  2. Armando Castellon, MSMental Health Counselor1255802344
  3. Amaya CastilloClinical Social Worker1427972926
  4. Annette CastilloMarriage & Family Therapist1396479366
  5. Candace CastilloBehavior Technician1144807470
  6. Dorothy CastilloCounselor1558553131
  7. Evelyn CastilloBehavior Analyst1164182143
  8. Isaac CastilloPeer Specialist1417726514
  9. Jocelyn CastilloDay Training/Habilitation Specialist1013735133
  10. Matthew CastilloMental Health Counselor1033482377
  11. Maurisa CastilloCounselor1003220542
  12. Tony CastilloRadiologic Technologist1821159179
  13. Maria Castillo Flores, MDPsychiatry Physician1922055987
  14. Denise Castillo NavarroCase Manager/Care Coordinator1598499733
  15. Leticia Castillo Rocha, MT-BCMusic Therapist1639802580
  16. Donna Castillo ZepedaMental Health Counselor1952934275
  17. Anne Castle, P.A.Physician Assistant1669424206
  18. Judith Castle, LVNLicensed Vocational Nurse1992199368
  19. Vernon Castle, LPTLicensed Psychiatric Technician1598259632
  20. Eliza CastrejonBehavior Technician1437935954
  21. Angelica CastroAddiction (Substance Use Disorder) Counselor1760133185
  22. Carolina Castro, LVNLicensed Vocational Nurse1487182614
  23. Gabriel CastroBehavior Technician1669053500
  24. Juan CastroSocial Worker1679252993
  25. Katrina Castro, M.S.CCC-SLPSpeech-Language Pathologist1275921686
  26. Laura Castro, M.S.Marriage & Family Therapist1932458924
  27. Melanie Castro, RNCase Management Registered Nurse1881524197
  28. Melissa CastroAddiction (Substance Use Disorder) Counselor1558937524
  29. Nicholas Castro, BARehabilitation Practitioner1679299820
  30. Nicole CastroBehavior Technician1164068102
  31. Nicole CastroMental Health Counselor1003559063
  32. Piona CastroBehavior Technician1255213856
  33. Robert Castro, DOInternal Medicine Physician1285777813
  34. Sky CastroSocial Worker1679108799
  35. Teresa Castro, RDN, CNSC, CDCESRegistered Dietitian1316518384
  36. Abisael CatalanStudent in an Organized Health Care Education/Training Program1912881665
  37. Annette Catanese, L.C.S.WClinical Social Worker1699789602
  38. Fatima Caton, MS, BCBABehavior Analyst1649942905
  39. Guadalupe Caton, MA, BCBABehavior Analyst1144987751
  40. Zorina CatunaCommunity Health Registered Nurse1538341144
  41. Bernadette CaulfieldMental Health Counselor1609100353
  42. Olivia CavagnaroPsychologist1205417441
  43. Thom CavalliPsychologist1497768089
  44. Elena CavazosMental Health Counselor1255462602
  45. Joseph Cavins, MAMental Health Counselor1154343531
  46. Mario Cea, RW7269Addiction (Substance Use Disorder) Counselor1942621289
  47. Ruth Cea, D.CChiropractor1275707507
  48. Xiomara Cea, MFT-IMental Health Counselor1629240775
  49. Graciela CeballosPeer Specialist1114627437
  50. Leonor CeballosBehavior Technician1588521819

The largest California cities

  1. Los Angeles69,537
  2. San Diego52,937
  3. San Francisco38,143
  4. Sacramento33,083
  5. San Jose20,925

All of California →

How to read this directory

Santa Ana, California appears in the CMS National Plan and Provider Enumeration System with 8,904 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 Santa Ana - 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 Santa Ana 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 Santa Ana is weighted toward Behavior Technician (1,625 clinicians, followed by Mental Health Counselor with 684 and Marriage & Family Therapist with 678). 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, Santa Ana reports roughly 22.9 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, Internal Medicine Physician is the most prominent one with no provider currently listing a Santa Ana practice address, a coverage gap Santa Ana patients typically fill by traveling to a larger nearby hub.

For Santa Ana 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 Santa Ana, CA?

There are 8,904 registered healthcare providers in Santa Ana, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Santa Ana?

The most common specialties in Santa Ana are Behavior Technician, Mental Health Counselor, Marriage & Family Therapist, Clinical Social Worker, Addiction (Substance Use Disorder) Counselor. Behavior Technician has the most providers with 1,625.

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.