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 40 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. Wing In ChanBehavior Technician1285475434
  2. Yuk-Kei Chan, RD, CDERegistered Dietitian1437375599
  3. Sidharth ChandDermatology Physician1992449466
  4. Vishal Chandan, MDAnatomic Pathology & Clinical Pathology Physician1841203445
  5. Michelle M Chandler, MDDiagnostic Radiology Physician1700966892
  6. Arthika ChandramohanOphthalmology Physician1033563069
  7. Carrie Chandwani, M.D.Emergency Medicine Physician1568675064
  8. Marc Chaney, PSYDClinical Child & Adolescent Psychologist1568112613
  9. Alice Chang, DOEmergency Medicine Physician1760064216
  10. Anthony Chang, M.D.Pediatric Cardiology Physician1144328360
  11. Brian Chang, PT, DPTPhysical Therapist1376299776
  12. Bryston Chang, MDNeonatal-Perinatal Medicine Physician1477189496
  13. Cassandra ChangBehavior Technician1457198392
  14. Charlotte ChangBehavior Technician1285471151
  15. Chi Chia ChangBehavior Technician1720801400
  16. Coelfinnia ChangBehavior Technician1760350102
  17. Daniel Chang, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1922727353
  18. David Chang, M.D., PH.D.Otolaryngology Physician1407172075
  19. Donald ChangVascular Surgery Physician1215515127
  20. Doo Chang, L.AC.Acupuncturist1235402454
  21. Elizabeth Chang, M.D.Student in an Organized Health Care Education/Training Program1508209610
  22. Eric Chang, M.D.Pain Medicine (Physical Medicine & Rehabilitation) Physician1407062920
  23. Esther ChangStudent in an Organized Health Care Education/Training Program1033911987
  24. Evelyn ChangBehavior Technician1336823673
  25. Franci ChangBehavior Technician1023900461
  26. Gloria Chang, NPFamily Nurse Practitioner1063331361
  27. Hannah ChangBehavior Technician1114756970
  28. Ian Chang, D.O.Rheumatology Physician1407116411
  29. Isabel ChangAnesthesiology Physician1821452293
  30. Jae C Chang, MDHematology & Oncology Physician1982784070
  31. James Chang, M.D.Anesthesiology Physician1700867298
  32. Jenny Chang, M.D.Pediatrics Physician1295020451
  33. Joseph Chang, MDStudent in an Organized Health Care Education/Training Program1730882846
  34. Josephine ChangStudent in an Organized Health Care Education/Training Program1366241689
  35. Julia ChangSpeech-Language Pathologist1841077369
  36. Kailey ChangBehavior Technician1548109564
  37. Kris Chang, D.O.Pediatrics Physician1770965956
  38. Matty Chang, O.D.Optometrist1770502296
  39. Oliver ChangOccupational Therapist1154804508
  40. Olivia Chang, M.D., M.P.H.Urogynecology and Reconstructive Pelvic Surgery (Obstetrics & Gynecology) Physician1881936862
  41. Pei Lin Chang, M.D.Pediatrics Physician1003101569
  42. Rachel ChangPharmacist1083331326
  43. Richard Chang, M.D.Pediatrics Physician1043317910
  44. Roger Chang, M.D.Hospitalist Physician1730158239
  45. Rosy Chang, PHARMDPharmacist1144677709
  46. Sarah ChangSpeech-Language Pathologist1023766102
  47. Stephanie Chang, MS, RD, CSPCCPediatric Critical Care Nutrition Registered Dietitian1114844685
  48. Tiffany ChangPediatric Occupational Therapist1770144081
  49. Timothy ChangStudent in an Organized Health Care Education/Training Program1023957131
  50. Vivian ChangNeonatal-Perinatal Medicine Physician1083177265

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.