NPPES file of Aug 9, 2026

Doctors and health care providers in Irvine, CA

7,778 individual NPPES records list a practice address in Irvine, 20th of 812 California cities. The largest group is behavior technician: 2,372, 30% of the city's records, against 18% across California. Page 102 of 156.

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

The 8 largest groups in Irvine

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

Irvine in California

  • Rank in California20th of 812 cities by records
  • Share of the state0.8% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups40.1% of all records

Compared with California as a whole, Irvine has 2.7× the state's share of assistant behavior analyst records and 0.28× its share of student in an organized health care education/training program records.

Providers in Irvine, alphabetically

  1. Matthew O'BymachowBehavior Technician1811713720
  2. Tara O'Connell, MDEmergency Medicine Physician1629245790
  3. Alexis O'ConnorBehavior Analyst1922640200
  4. Cara O'MahonyBehavior Technician1659006773
  5. Nicholas O'Neal, A.T.CAthletic Trainer1750523288
  6. Sean O'Neill, LMFTMarriage & Family Therapist1215202304
  7. Maryellen O'Reilly, M.D.General Practice Physician1780851808
  8. Zackery Oakey, MDOphthalmology Physician1720320872
  9. Sarah Obaid, NPFamily Nurse Practitioner1477387249
  10. Kaitlyn ObergBehavior Technician1568248052
  11. Olivia ObermeyerBehavior Technician1578041851
  12. Trevor ObloukBehavior Technician1396409744
  13. Lizeth OcampoBehavior Technician1639896459
  14. Natalia OcampoBehavior Technician1063151835
  15. Maria Ocampo BritoBehavior Technician1053982371
  16. Arianna OchoaBehavior Technician1851878060
  17. Celeste OchoaBehavior Technician1336038371
  18. Gavin OctavianoBehavior Technician1801392444
  19. Beverly Oden, LPCCProfessional Counselor1578350880
  20. Joan Odom, MDChild & Adolescent Psychiatry Physician1740216803
  21. Michael OgdenBehavior Technician1942023668
  22. Jessica Rene OgenaBehavior Analyst1598346488
  23. Claire OhBehavior Analyst1609588003
  24. Daniel Oh, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1932396611
  25. Daniel Oh, RPHPharmacist1225567639
  26. David Oh, PMHNP - BCPsychiatric/Mental Health Nurse Practitioner1730764192
  27. Grace OhPhysician Assistant1790560910
  28. Moonmock Oh, M.D.Family Medicine Physician1902838881
  29. Sangduk Oh, DDS, PHDGeneral Practice Dentistry1831386671
  30. Steve OhDentist1457518136
  31. Tae Oh, LACAcupuncturist1487929329
  32. William Oh, M.D.Colon & Rectal Surgery Physician1598100323
  33. Youngnam Oh, L.ACAcupuncturist1336887538
  34. Jun-Ichi Ohara, M.D., PH.D.Gastroenterology Physician1578665667
  35. Junko Ohara, MDInternal Medicine Physician1609434075
  36. Jonathan Oishi, D.O.Internal Medicine Physician1396109781
  37. Sumire OkadaBehavior Technician1790392637
  38. Nusheen OkamotoPhysical Therapist1578440970
  39. Chieko OkawaBehavior Technician1508797895
  40. Ryu OkazakiBehavior Technician1922730027
  41. Christy OkoloBehavior Technician1669192407
  42. Maureen Okoro, PHARM. DPharmacist1629391677
  43. Mikel Okouchi, D.C.Chiropractor1831109768
  44. Shea OlayosPhysical Therapist1710779046
  45. Isabella Oldham, RDN, LDNRegistered Dietitian1508686023
  46. Frida Olea GallegosBehavior Technician1689444127
  47. Cindy OlivaBehavior Technician1811860646
  48. Carmen OlivaresBehavior Technician1659156206
  49. Cecilia OlivaresBehavior Technician1528770088
  50. Jacquelyn OliveBehavior Technician1396416723

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

Irvine, California appears in the CMS National Plan and Provider Enumeration System with 7,778 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 Irvine - 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 Irvine 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 Irvine is weighted toward Behavior Technician (2,372 clinicians, followed by Behavior Analyst with 376 and Marriage & Family Therapist with 368). 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, Irvine reports roughly 20 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, Addiction (Substance Use Disorder) Counselor is the most prominent one with no provider currently listing a Irvine practice address, a coverage gap Irvine patients typically fill by traveling to a larger nearby hub.

For Irvine 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 Irvine, CA?

There are 7,778 registered healthcare providers in Irvine, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Irvine?

The most common specialties in Irvine are Behavior Technician, Behavior Analyst, Marriage & Family Therapist, Pharmacist, Physical Therapist. Behavior Technician has the most providers with 2,372.

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.