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 175 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. Margaret Norton, MS, OTR/LOccupational Therapist1801559810
  2. Nina NosavanStudent in an Organized Health Care Education/Training Program1437537966
  3. Madeline Nottoli, MDStudent in an Organized Health Care Education/Training Program1851145205
  4. Sahar Nourani, RNRegistered Nurse1508426099
  5. Mahra Nourbakhsh, MDAnatomic Pathology Physician1407407901
  6. Mahzadeh Nourizadeh, NPNurse Practitioner1508999301
  7. Ricardo Novelo-RamirezBehavior Technician1407581366
  8. Heather NowellBehavior Technician1154218204
  9. Marissa Noyer, BCBABehavior Analyst1427577691
  10. Jennifer NoyolaOther Technician1962171421
  11. Selina Noyola PinaBehavior Technician1821772658
  12. Maryann Nuesse, D.O.Adult Medicine Physician1689633455
  13. William Nuesse, M.D.Adult Medicine Physician1952360729
  14. Diane Nugent, M.D.Pediatric Hematology & Oncology Physician1770528663
  15. James NugentMarriage & Family Therapist1891335675
  16. Christina Numamoto, LMFTMarriage & Family Therapist1326381344
  17. Dezirae NunezBehavior Technician1831042860
  18. Irene Nunez, LCSWClinical Social Worker1376036103
  19. Jaqueline NunezSocial Worker1982321576
  20. Jazmine NunezAssistant Behavior Analyst1558050864
  21. Magdalena NunezCounselor1689432577
  22. Molly E Nunez, NPNurse Practitioner1851473037
  23. Silvia NunezCase Manager/Care Coordinator1588258552
  24. Yamil Nunez AbbudBehavior Technician1235013012
  25. Andres Nunez PasaranBehavior Technician1114624160
  26. Cindy Nunez-FloresClinical Social Worker1295177582
  27. Jolie NunoDrama Therapist1841117942
  28. Kenneth Nwaezeapu, CRNACertified Registered Nurse Anesthetist1710468574
  29. Elijah NyaggahBehavior Technician1720790108
  30. David NykinStudent in an Organized Health Care Education/Training Program1356873293
  31. Melanie NylandBehavior Technician1982456943
  32. Thaddeus O'Barr, M.D.Anesthesiology Physician1609168814
  33. Brandon O'Brien, R.R.T.Home Modifications Contractor1407192057
  34. Brianna O'BrienPsychiatric/Mental Health Registered Nurse1881532521
  35. Connor O'Brien, MDStudent in an Organized Health Care Education/Training Program1457055964
  36. Gianmarco O'Brien, D.D.S.Prosthodontics1336338847
  37. Susan O'Brien, M.D.Medical Oncology Physician1669577276
  38. Cameron O'Connell, DOPediatrics Physician1578253571
  39. Patricia O'ConnellNursing Home Administrator1386216117
  40. Ryan O'Connell, M.D.Anatomic Pathology & Clinical Pathology Physician1609288794
  41. Haylie O'ConnorBehavior Technician1881348456
  42. Sarah O'DellStudent in an Organized Health Care Education/Training Program1801737887
  43. Christina O'HaraLicensed Psychiatric Technician1881136208
  44. Mitchell O'LearyStudent in an Organized Health Care Education/Training Program1942905864
  45. Allison O'Meara, PNPPediatric Nurse Practitioner1508457730
  46. Holly O'MearaAddiction (Substance Use Disorder) Counselor1659000701
  47. Frances O'Neil- HoppeRegistered Dietitian1548413750
  48. Jacqueline O'Neill, MDHospitalist Physician1588153886
  49. Michael O'Reilly, PA-CPhysician Assistant1669139879
  50. Christina O'Sullivan, JD, PHDForensic Psychologist1831486000

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.