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 170 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. Jody Nguyen, BCBABehavior Analyst1114486685
  2. John Nguyen, M.D.Pediatric Nephrology Physician1902006075
  3. John NguyenBehavior Technician1457151599
  4. Johnny NguyenPeer Specialist1487222501
  5. Johnny NguyenBehavior Technician1467319699
  6. Johnson NguyenBehavior Technician1275459075
  7. Jonathan NguyenBehavior Technician1184453995
  8. Joseph Nguyen, MDAllergy & Immunology (Internal Medicine) Physician1225217425
  9. Joseph NguyenBehavior Technician1275370132
  10. Joyce NguyenBehavior Technician1811604200
  11. Julie Nguyen, MDStudent in an Organized Health Care Education/Training Program1740081645
  12. Julie NguyenBehavior Technician1790653632
  13. Julie NguyenBehavior Technician1750226569
  14. Justin NguyenBehavior Technician1639053432
  15. Justin NguyenBehavior Technician1578400776
  16. Justine Nguyen, PHARMDPharmacist1346888914
  17. Kacy NguyenBehavior Technician1003624933
  18. Katherine NguyenOther Technician1295321081
  19. Katie NguyenBehavior Technician1841046174
  20. Katie NguyenBehavior Technician1629812268
  21. Kaycee NguyenBehavior Technician1881511707
  22. Kayla NguyenOther Technician1477208114
  23. Kelly NguyenOrthodontics and Dentofacial Orthopedics Dentistry1982180493
  24. Kelly NguyenBehavior Technician1154298289
  25. Kelvin Nguyen, M.D.Anesthesiology Physician1699861146
  26. Kelvin Nguyen, M.D.Student in an Organized Health Care Education/Training Program1174816821
  27. Kelvin NguyenBehavior Technician1649121633
  28. Kevin NguyenPharmacist1437713427
  29. Kevin NguyenBehavior Technician1205617701
  30. Kevin Nguyen, PHARMDStudent in an Organized Health Care Education/Training Program1861274201
  31. Kevin NguyenBehavior Technician1184599532
  32. Kha NguyenCertified Registered Nurse Anesthetist1811885403
  33. Khanh NguyenMassage Therapist1720660343
  34. Khoi NguyenStudent in an Organized Health Care Education/Training Program1629727045
  35. Khue Nguyen, PHARMDPharmacist1659039212
  36. Kim Nguyen, COTAOccupational Therapy Assistant1396905691
  37. Kim NguyenBehavior Technician1275249989
  38. Kim-Anh Nguyen, M.D.Anesthesiology Physician1134456437
  39. Kinh-Vy Nguyen, MDAnesthesiology Physician1467081950
  40. Kristie NguyenBehavior Technician1053141291
  41. Krystianna Nguyen, PH. D.Clinical Psychologist1922585793
  42. Lan Nguyen, MDInternal Medicine Physician1669552832
  43. Larry NguyenBehavior Technician1972369304
  44. Lawrence Nguyen, DONephrology Physician1932627874
  45. Leann NguyenBehavior Technician1134849987
  46. Lesley NguyenBehavior Technician1023900891
  47. Lester NguyenBehavior Technician1437868536
  48. Levan NguyenFamily Nurse Practitioner1093602575
  49. Lillian Nguyen, PA-CPhysician Assistant1245717024
  50. Lillian NguyenBehavior Technician1376463000

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.