NPPES file of Aug 9, 2026

Doctors and health care providers in Orange, CA

13,245 individual NPPES records list a practice address in Orange, 11th of 812 California cities. The largest group is behavior technician: 4,271, 32% of the city's records, against 18% across California. Page 177 of 265.

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

The 8 largest groups in Orange

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

Orange in California

  • Rank in California11th of 812 cities by records
  • Share of the state1.4% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups42% of all records
  • Behavior Technician rank7th of the 10 California cities with the most

Compared with California as a whole, Orange has 7.3× the state's share of other technician records and 0.43× its share of physical therapist records.

Providers in Orange, alphabetically

  1. Iffessi OkaroBehavior Technician1568267227
  2. Sarafina OkekeCommunity Health Worker1245075365
  3. Calvin Okey, DOPain Medicine Physician1700957784
  4. Maryagatha Okpala, RN, PHNCommunity Health Registered Nurse1982885463
  5. Genesis Okugbe, NPFamily Nurse Practitioner1497682173
  6. Anysia OlaguePediatric Nurse Practitioner1316544240
  7. Jenny OlagueBehavior Technician1003611559
  8. Blythe Olander, CCC-SLPSpeech-Language Pathologist1326271438
  9. Marlon OlanoRegistered Nurse1780309484
  10. Martin OlanoLicensed Vocational Nurse1366159501
  11. Marvin OlanoRegistered Nurse1194695437
  12. Joffre OlayaNeurological Surgery Physician1326255852
  13. Windy Olaya, M.D.Plastic and Reconstructive Surgery Physician1508063934
  14. Sepehr Oliaei, M.D.Otolaryngology Physician1801032842
  15. Larry OliffAddiction (Substance Use Disorder) Counselor1215397351
  16. Chelsea Olivar, LCSWClinical Social Worker1780156638
  17. Leslie OlivaresBehavior Technician1245949445
  18. Lynne Oliveira, LMFTMarriage & Family Therapist1235146796
  19. Lacee Oliver, PAMedical Physician Assistant1891331385
  20. Pilar OliverCommunity Health Worker1912691858
  21. Akesa OlivetiRehabilitation Practitioner1750953667
  22. Helena OlivieriPediatrics Physician1295437960
  23. Cesar Olmos, DDSGeneral Practice Dentistry1912505538
  24. Joally OlmosBehavior Technician1598639122
  25. Jose Olmos, R.N.Registered Nurse1992862288
  26. Leann OlmosBehavior Technician1235083130
  27. Stephany OlmosStudent in an Organized Health Care Education/Training Program1265132898
  28. Alexandria OlneyStudent in an Organized Health Care Education/Training Program1114729613
  29. Rosalynne Olshansky, M.D.Pediatrics Physician1356729792
  30. Anita OlsonSchool Psychologist1851224174
  31. Brent Olson, MDDiagnostic Radiology Physician1427588615
  32. Jordyn OlsonBehavior Technician1003706847
  33. Sheryl OlsonNurse Practitioner1912302852
  34. Todd Olson, MFTMarriage & Family Therapist1396121042
  35. Ashley OlveraBehavior Technician1700738804
  36. Maria Olvera, PH.DPsychologist1568550101
  37. Isabel Olvera HernandezClinical Social Worker1578303533
  38. Jennifer Ann Oman, MDEmergency Medicine Physician1730269978
  39. Mery Oman, NURSE PRACTITIONERNurse Practitioner1417212465
  40. Cezanne OmarBehavior Technician1346950896
  41. Nimco Omar, MSN FNPFamily Nurse Practitioner1134046790
  42. Pushtana Omar, LMFT, MSMarriage & Family Therapist1073291993
  43. Tareq OmariDentist1942340682
  44. Shaida OmidNeurology Physician1295358414
  45. Linet OndariCertified Registered Nurse Anesthetist1467201665
  46. Craig Oney, CAADE - 4166-IAddiction (Substance Use Disorder) Counselor1679920722
  47. Dominic OngMarriage & Family Therapist1689094450
  48. Joshua OngNurse Practitioner1659033819
  49. Tiong S Ong, MDHematology & Oncology Physician1467532606
  50. Sebastian OngkoBehavior Technician1124967443

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

Orange, California appears in the CMS National Plan and Provider Enumeration System with 13,245 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 Orange - 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 Orange 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 Orange is weighted toward Behavior Technician (4,271 clinicians, followed by Student in an Organized Health Care Education/Training Program with 870 and Marriage & Family Therapist with 424). 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, Orange reports roughly 34 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, Case Manager/Care Coordinator is the most prominent one with no provider currently listing a Orange practice address, a coverage gap Orange patients typically fill by traveling to a larger nearby hub.

For Orange 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 Orange, CA?

There are 13,245 registered healthcare providers in Orange, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Orange?

The most common specialties in Orange are Behavior Technician, Student in an Organized Health Care Education/Training Program, Marriage & Family Therapist, Clinical Social Worker, Mental Health Counselor. Behavior Technician has the most providers with 4,271.

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.