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 33 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. Richard Ochart, D.C.Chiropractor1992836696
  2. Edwin OchoaBehavior Technician1043000953
  3. Dorcas OcranRegistered Nurse1821794074
  4. Buzand OganesianInternal Medicine Physician1568049591
  5. Simon OgomStudent in an Organized Health Care Education/Training Program1467857854
  6. Grace OgunkunleRegistered Nurse1780356808
  7. Dotun Ogunyemi, MDMaternal & Fetal Medicine Physician1619078532
  8. Abigael OgwoLicensed Psychiatric Technician1063686426
  9. Mark OhRegistered Nurse1629604491
  10. Ryan OhRegistered Nurse1821804907
  11. Gabriel OkekeRegistered Nurse1518138171
  12. Bernadette Okonkwo, NPPsychiatric/Mental Health Nurse Practitioner1588030506
  13. Xiaoping OkusanyaRegistered Nurse1629730940
  14. Kahoru OkuyamaRegistered Nurse1558919308
  15. Christiana OkworRegistered Nurse1376128736
  16. Jeffrey OkyereRegistered Nurse1538744990
  17. Fausat OladipoPsychiatric/Mental Health Nurse Practitioner1467989525
  18. Emma Oliver, PA-CPhysician Assistant1033896519
  19. Rachel OliverCertified Registered Nurse Anesthetist1487515383
  20. Julie OliverioLicensed Vocational Nurse1962675942
  21. Ashley Olmedo Mendoza, BSWSocial Worker1790263267
  22. Stacy Olney, BCBA 1-21-55585Behavior Analyst1417473257
  23. Kehinde OlunloyoLicensed Vocational Nurse1760366710
  24. Collet OluohaRegistered Nurse1255968806
  25. Juliana OmejeRegistered Nurse1114505385
  26. Pius OmolewaPsychiatric/Mental Health Registered Nurse1841462298
  27. Victoria OmoruyiLicensed Vocational Nurse1841462397
  28. Kevin OngStudent in an Organized Health Care Education/Training Program1003663824
  29. Harriet OngondoRegistered Nurse1700778636
  30. Thet Oo, MDGeriatric Medicine (Internal Medicine) Physician1538152095
  31. Shane OostingaAddiction (Substance Use Disorder) Counselor1629802087
  32. Derek Orchard, D.O.Emergency Medicine Physician1780965749
  33. Tania OrdazBehavior Technician1487475000
  34. Noemi OrdonaRegistered Nurse1679926281
  35. Michea OringMarriage & Family Therapist1669220968
  36. Cherechi OrjiRegistered Nurse1770271132
  37. Carmelita OrnelasRegistered Nurse1902461460
  38. Lizeth OrnelasSpeech-Language Pathologist1275484610
  39. Esosa OronsayeRegistered Nurse1962219634
  40. John Gabriel Orpilla, CRNACertified Registered Nurse Anesthetist1306573811
  41. Frederick Orr, M.D.Diagnostic Radiology Physician1295830321
  42. Alexis OrtegaPeer Specialist1083185318
  43. Miguel OrtegaRegistered Nurse1336031285
  44. Ramona OrtezAddiction (Substance Use Disorder) Counselor1245797521
  45. Kelly Ortiz, CADC-IIAddiction (Substance Use Disorder) Counselor1215466529
  46. Sylvia Ortiz, M.D.Diagnostic Radiology Physician1326143462
  47. Timothy Ortiz, NURSE PRACTITIONERFamily Nurse Practitioner1558149112
  48. Davit OrujyanStudent in an Organized Health Care Education/Training Program1396586566
  49. Deneb OsanoRegistered Nurse1942537386
  50. Airielle OsillaBehavior Technician1679296008

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.