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.
The 8 largest groups in Colton
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
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
- Richard Ochart, D.C.Chiropractor1992836696
- Edwin OchoaBehavior Technician1043000953
- Dorcas OcranRegistered Nurse1821794074
- Buzand OganesianInternal Medicine Physician1568049591
- Simon OgomStudent in an Organized Health Care Education/Training Program1467857854
- Grace OgunkunleRegistered Nurse1780356808
- Dotun Ogunyemi, MDMaternal & Fetal Medicine Physician1619078532
- Abigael OgwoLicensed Psychiatric Technician1063686426
- Mark OhRegistered Nurse1629604491
- Ryan OhRegistered Nurse1821804907
- Gabriel OkekeRegistered Nurse1518138171
- Bernadette Okonkwo, NPPsychiatric/Mental Health Nurse Practitioner1588030506
- Xiaoping OkusanyaRegistered Nurse1629730940
- Kahoru OkuyamaRegistered Nurse1558919308
- Christiana OkworRegistered Nurse1376128736
- Jeffrey OkyereRegistered Nurse1538744990
- Fausat OladipoPsychiatric/Mental Health Nurse Practitioner1467989525
- Emma Oliver, PA-CPhysician Assistant1033896519
- Rachel OliverCertified Registered Nurse Anesthetist1487515383
- Julie OliverioLicensed Vocational Nurse1962675942
- Ashley Olmedo Mendoza, BSWSocial Worker1790263267
- Stacy Olney, BCBA 1-21-55585Behavior Analyst1417473257
- Kehinde OlunloyoLicensed Vocational Nurse1760366710
- Collet OluohaRegistered Nurse1255968806
- Juliana OmejeRegistered Nurse1114505385
- Pius OmolewaPsychiatric/Mental Health Registered Nurse1841462298
- Victoria OmoruyiLicensed Vocational Nurse1841462397
- Kevin OngStudent in an Organized Health Care Education/Training Program1003663824
- Harriet OngondoRegistered Nurse1700778636
- Thet Oo, MDGeriatric Medicine (Internal Medicine) Physician1538152095
- Shane OostingaAddiction (Substance Use Disorder) Counselor1629802087
- Derek Orchard, D.O.Emergency Medicine Physician1780965749
- Tania OrdazBehavior Technician1487475000
- Noemi OrdonaRegistered Nurse1679926281
- Michea OringMarriage & Family Therapist1669220968
- Cherechi OrjiRegistered Nurse1770271132
- Carmelita OrnelasRegistered Nurse1902461460
- Lizeth OrnelasSpeech-Language Pathologist1275484610
- Esosa OronsayeRegistered Nurse1962219634
- John Gabriel Orpilla, CRNACertified Registered Nurse Anesthetist1306573811
- Frederick Orr, M.D.Diagnostic Radiology Physician1295830321
- Alexis OrtegaPeer Specialist1083185318
- Miguel OrtegaRegistered Nurse1336031285
- Ramona OrtezAddiction (Substance Use Disorder) Counselor1245797521
- Kelly Ortiz, CADC-IIAddiction (Substance Use Disorder) Counselor1215466529
- Sylvia Ortiz, M.D.Diagnostic Radiology Physician1326143462
- Timothy Ortiz, NURSE PRACTITIONERFamily Nurse Practitioner1558149112
- Davit OrujyanStudent in an Organized Health Care Education/Training Program1396586566
- Deneb OsanoRegistered Nurse1942537386
- Airielle OsillaBehavior Technician1679296008
The largest California cities
- Los Angeles69,537
- San Diego52,937
- San Francisco38,143
- Sacramento33,083
- San Jose20,925
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.