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 172 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. Roger NguyenOther Technician1215511423
  2. Rosabelle Nguyen, O.T.R./LOccupational Therapist1164557773
  3. Ryan Nguyen, PAPhysician Assistant1619751476
  4. Ryan NguyenBehavior Technician1891662805
  5. Salin NguyenBehavior Technician1760257109
  6. Sarah NguyenBehavior Technician1457204497
  7. Sheila Nguyen, NPAcute Care Nurse Practitioner1629626122
  8. Son Tung NguyenBehavior Technician1255106506
  9. Stephanie NguyenPediatric Pharmacist1013585108
  10. Steven NguyenStudent in an Organized Health Care Education/Training Program1992559173
  11. Sukha NguyenBehavior Technician1649956640
  12. Summer NguyenBehavior Analyst1982164513
  13. Susan NguyenPhysical Therapist1700104809
  14. Sydney NguyenBehavior Technician1982474383
  15. Sydney Nguyen, PHARMDPharmacist1669331476
  16. Tammy NguyenBehavior Technician1538978986
  17. Tanya NguyenBehavior Technician1578248373
  18. Tate NguyenBehavior Technician1750273249
  19. Tess NguyenBehavior Technician1255156683
  20. Thanh Huong T Nguyen, MDDiagnostic Radiology Physician1740360916
  21. Thanhtam Nguyen, MDPediatrics Physician1922049527
  22. Theodore Nguyen, MDStudent in an Organized Health Care Education/Training Program1376397794
  23. Theresa NguyenRenal Nutrition Registered Dietitian1619487311
  24. Thi My Nguyet NguyenStudent in an Organized Health Care Education/Training Program1093431892
  25. Thi Thanh Mai NguyenCommunity Health Worker1225712037
  26. Thi Uyen Nhu NguyenBehavior Technician1396608303
  27. Thien Nguyen, MDStudent in an Organized Health Care Education/Training Program1598566903
  28. Thoa NguyenBehavior Technician1619434107
  29. Thomas NguyenBehavior Technician1467172494
  30. Thomas NguyenBehavior Technician1427733427
  31. Thong H Nguyen, MDDiagnostic Radiology Physician1194805366
  32. Thuan NguyenAssistant Behavior Analyst1720797921
  33. Tiana NguyenBehavior Technician1659210813
  34. Tien NguyenBehavior Technician1699512939
  35. Tiffany Nguyen, DCChiropractor1518765247
  36. Tiffany NguyenBehavior Technician1548121577
  37. Tin Nguyen, DMDDentist1053635813
  38. Tin NguyenBehavior Technician1972207249
  39. Tina NguyenAssistant Behavior Analyst1629767553
  40. Tisha Nguyen, PHDPharmacist1972885929
  41. Tolan Nguyen, PAPhysician Assistant1114114394
  42. Tony Nguyen, MDPhysical Medicine & Rehabilitation Physician1578025730
  43. Tony NguyenBehavior Technician1497559355
  44. Tracy Nguyen, NONEBehavior Technician1992435457
  45. Tracy NguyenDentist1801763644
  46. Transon Nguyen, PHARM.D.Pharmacist1932494556
  47. Trinh NguyenBehavior Technician1790500213
  48. Trisha NguyenPharmacist1821966359
  49. Truc-Mai NguyenBehavior Technician1962204495
  50. Trung Nguyen, M.D.Anesthesiology Physician1174608046

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.