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 118 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. Nicole Adeola OdufaluDoula1851253348
  2. Carla Odwald, PHYSICAL THERAPISTPhysical Therapist1982659868
  3. Martin Offenberger, M.D.General Practice Physician1740492180
  4. Judy Ogan, PHNCommunity Health Registered Nurse1568643989
  5. Delia Ogawa, RNPWomen's Health Nurse Practitioner1912005133
  6. Virgilus Ogbedeagu, LVNLicensed Vocational Nurse1689459828
  7. Oluwaseun Ogunjimi, NURSE PRACTITIONERNurse Practitioner1194243790
  8. Christine Oh, D.D.S.General Practice Dentistry1053452367
  9. Daniel Oh, DDSDentist1962599597
  10. Hangeal Oh, BEHAVIOR TECHNICIANBehavior Technician1447913868
  11. Joseph OhBehavior Technician1962086017
  12. Katherine Oien, OTD, OTR/L, MSPediatric Occupational Therapist1881148021
  13. Olubukola OjoBehavior Technician1700614351
  14. Rumiko Okada, PH.D.Clinical Psychologist1295862092
  15. Thomas Okamoto, M.D.Psychiatry Physician1235178021
  16. Emmanuel OkekeMental Health Counselor1003015959
  17. Tamara OkiStudent in an Organized Health Care Education/Training Program1457233900
  18. Maria OlagueMarriage & Family Therapist1922661370
  19. Lillian Olden, RN PHNCommunity Health Registered Nurse1891976023
  20. Andres Olea, BASocial Worker1457024929
  21. Katherine OleaSocial Worker1760929889
  22. Eric Olguin, DDSGeneral Practice Dentistry1215065461
  23. Elise Oliande, NONEBehavior Technician1144992496
  24. Emily OlivaresMarriage & Family Therapist1811707649
  25. Fatima OlivaresAddiction (Substance Use Disorder) Counselor1609562834
  26. Magdalena OlivaresMarriage & Family Therapist1609026814
  27. Abraham OlivasOccupational Therapy Assistant1982287173
  28. Justine OlivasMental Health Counselor1154981066
  29. Harlie OliverBehavior Technician1740941897
  30. Veronica Oliver-Williams, BEHAVIOR TECHNICIANBehavior Technician1386116861
  31. Alan OlmedoCounselor1841710159
  32. Monserrat OlmedoBehavior Technician1346008497
  33. Ibunkun Olorunoje, PAPhysician Assistant1255723797
  34. Maria Olvera, MDAnatomic Pathology & Clinical Pathology Physician1427019264
  35. Robert Olvera, MDFamily Medicine Physician1356322523
  36. Shirley Omlin, 00501011536Mental Health Counselor1174063762
  37. Kierran Oneill, APCCCounselor1235787029
  38. Audrey Ong, M.D.Specialist1033144365
  39. Lawrence Ong, M.D., M.ENG.Anesthesiology Physician1316254840
  40. Richard Ong, M.D.Specialist1881629251
  41. Susanna OnofreClinical Social Worker1346888518
  42. Emily OntiverosBehavior Technician1669245494
  43. Paulina OntiverosBehavior Technician1861007866
  44. Julian Opena, AMFTMarriage & Family Therapist1407528425
  45. Cassandra OpreClinical Social Worker1235862541
  46. Crystal Ordonez, BEHAVIOR TECHNICIANBehavior Technician1528638525
  47. Mariajose OrdonezCase Manager/Care Coordinator1437046166
  48. Nancy OrdonezCase Manager/Care Coordinator1396926358
  49. David OrecchiaMarriage & Family Therapist1033699970
  50. Sean OreilllyPeer Specialist1518649680

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.