NPPES file of Aug 9, 2026

Doctors and health care providers in Colton, CA

2,459 individual NPPES records list a practice address in Colton, 93rd of 812 California cities. The largest group is registered nurse: 345, 14% of the city's records, against 1% across California. Page 32 of 50.

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

Colton in California

  • Rank in California93rd of 812 cities by records
  • Share of the state0.3% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups32.7% of all records
  • Registered Nurse rank7th of the 10 California cities with the most

Compared with California as a whole, Colton has 13.3× the state's share of licensed psychiatric technician records and 0.23× its share of behavior technician records.

Providers in Colton, alphabetically

  1. Vivian Ngo, MDFamily Medicine Physician1982125969
  2. Albert Nguyen, MDStudent in an Organized Health Care Education/Training Program1497259568
  3. Alexandra Nguyen, MDSurgery Physician1093389181
  4. Anh Nguyen, M.DEmergency Medicine Physician1366485732
  5. Anna NguyenLicensed Psychiatric Technician1437490265
  6. Annie NguyenPharmacist1316499056
  7. Anthony Nguyen, MDEmergency Medicine Physician1265172324
  8. Anthony Nguyen, MDStudent in an Organized Health Care Education/Training Program1639910235
  9. Christine Nguyen, DDSDentist1053426684
  10. Doan Nguyen, MDPsychiatry Physician1457493405
  11. Edward NguyenEmergency Medicine Physician1467711549
  12. Felix Nguyen, PA-CPhysician Assistant1548824188
  13. Hai NguyenPharmacist1871966085
  14. Kimloan NguyenRegistered Nurse1801269428
  15. Lien Nguyen, O.D.Optometrist1396896791
  16. Loc NguyenRegistered Nurse1881937175
  17. Mariam Nguyen, MDStudent in an Organized Health Care Education/Training Program1083508220
  18. My Chau Nguyen, MDStudent in an Organized Health Care Education/Training Program1770422842
  19. Nguyen NguyenFamily Medicine Physician1780063024
  20. Nicholas NguyenStudent in an Organized Health Care Education/Training Program1982464012
  21. Robert Nguyen, MDInternal Medicine Physician1144256900
  22. Tam NguyenPharmacist1497163083
  23. Loreen NgwaziniAdult Psychiatric/Mental Health Registered Nurse1669757282
  24. Madison NicholsBehavior Technician1659159986
  25. Brian Nielsen, DOInternal Medicine Physician1710143573
  26. Kathryn NielsonRegistered Nurse1366613085
  27. Edward NiemanChiropractor1518245208
  28. Andrew Nik, MDVascular Neurology Physician1316177520
  29. Nichole Niknafs, D.O.Student in an Organized Health Care Education/Training Program1962899930
  30. Margaret Ninneman, CCC-SLPSpeech-Language Pathologist1295721298
  31. Clara Nnadi, NURSE PRACTITIONERFamily Nurse Practitioner1124538152
  32. Tammy Nodler, CRNACertified Registered Nurse Anesthetist1750540902
  33. Thet Myat Noe, MDStudent in an Organized Health Care Education/Training Program1700589595
  34. Patrik Norouzi, MDStudent in an Organized Health Care Education/Training Program1629917356
  35. Mallory Novack, D.O.Obstetrics & Gynecology Physician1427324185
  36. Alberto Nunez, MDStudent in an Organized Health Care Education/Training Program1770478471
  37. Danitza NunezPeer Specialist1063937316
  38. Steven NunezLicensed Vocational Nurse1932370822
  39. Nnenna NwagboPsychiatric/Mental Health Nurse Practitioner1730714338
  40. Henrietta NwamuRegistered Nurse1144493933
  41. Darlington Nwite, RNRegistered Nurse1730913229
  42. Jane NwokeabiaPsychiatric/Mental Health Nurse Practitioner1093359549
  43. Henry Nwosu, NPFamily Nurse Practitioner1205559556
  44. Martine NyiramahirweRegistered Nurse1093112526
  45. Timothy O'Kelley, D.O.Emergency Medicine Physician1962788224
  46. Jennifer O'Neill, RDNRegistered Dietitian1629780192
  47. Angelina ObaRegistered Nurse1558740746
  48. Brooklyn Ober, PA-CPhysician Assistant1982595757
  49. Christina ObikeRegistered Nurse1326911611
  50. Sergio OcampoRegistered Nurse1942730346

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

Colton, California appears in the CMS National Plan and Provider Enumeration System with 2,459 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 Colton - 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 Colton 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 Colton is weighted toward Registered Nurse (345 clinicians, followed by Student in an Organized Health Care Education/Training Program with 297 and Physician Assistant with 162). 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, Colton reports roughly 6.3 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, Physical Therapist is the most prominent one with no provider currently listing a Colton practice address, a coverage gap Colton patients typically fill by traveling to a larger nearby hub.

For Colton 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 Colton, CA?

There are 2,459 registered healthcare providers in Colton, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Colton?

The most common specialties in Colton are Registered Nurse, Student in an Organized Health Care Education/Training Program, Physician Assistant, Addiction (Substance Use Disorder) Counselor, Emergency Medicine Physician. Registered Nurse has the most providers with 345.

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.