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 42 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
- Marites SherkRegistered Nurse1245978824
- Catherine Sherman, D.O.Internal Medicine Physician1710299185
- Jason Sherman, CRNACertified Registered Nurse Anesthetist1477569317
- Jeanette Shibata, MSPAPhysician Assistant1306031448
- Emily ShimamotoPhysician Assistant1235747122
- Paige Shipman, DOStudent in an Organized Health Care Education/Training Program1902744337
- Christina Shockley, LVNLicensed Vocational Nurse1730607250
- Nedyne ShortsLicensed Vocational Nurse1770755084
- Ashi ShrivastavaEmergency Medicine Physician1083473508
- Paul ShubinAddiction (Substance Use Disorder) Counselor1841824661
- Chandler Shyu, MDDiagnostic Radiology Physician1265447106
- Kodie SibbettCounselor1932778768
- Alysa SibrianStudent in an Organized Health Care Education/Training Program1851967897
- Javed Siddiqi, MDNeurological Surgery Physician1407963176
- Usman SiddiquiFamily Medicine Physician1457055097
- Shaun SidhuStudent in an Organized Health Care Education/Training Program1629864525
- Stella Sien, D.O.Obstetrics & Gynecology Physician1558592444
- Carlos SiezarMental Health Counselor1790109619
- Adrianna SilvaMassage Therapist1407463904
- Stacy Silva, LVNLicensed Vocational Nurse1255068243
- Paola Silva-SerranoBehavior Analyst1417870544
- Genny SimFamily Medicine Physician1588936256
- Marvin SimandjuntakRegistered Nurse1952658999
- Jeperson SimanjuntakRegistered Nurse1730564329
- Saverio Simari, MPTPhysical Therapist1922301191
- Sondang SimbolonRegistered Nurse1528413465
- Nancy SimonLicensed Psychiatric Technician1104098722
- Patrick SimonRegistered Nurse1275704835
- Tara Simonson, PA-CPhysician Assistant1659934321
- Michael Simpson, MS SLP-CCCSpeech-Language Pathologist1346403979
- Renee Simpson, CRNACertified Registered Nurse Anesthetist1780114728
- Alyssia SimsRehabilitation Practitioner1912484643
- Arnold Sin, M.DEmergency Medicine Physician1649212408
- Stacie Singh, LCSWClinical Social Worker1124266085
- Rachel Sinit, DOStudent in an Organized Health Care Education/Training Program1558022830
- Clarence Sinkhorn, MDObstetrics & Gynecology Physician1972676195
- Emma SircarPsychiatric/Mental Health Registered Nurse1073784799
- Alfred Siringo-RingoRegistered Nurse1821632373
- Lizette Sistoza, MDNeonatal-Perinatal Medicine Physician1235235672
- Ishak SitanggangRegistered Nurse1063736809
- John SkafStudent in an Organized Health Care Education/Training Program1255781100
- Sindia SlackMarriage & Family Therapist1851951883
- Deborah Small, MDFamily Medicine Physician1437166295
- Benjamin Smith, BCBABehavior Analyst1609498823
- Clayton Smith, CRNACertified Registered Nurse Anesthetist1649643412
- Gregory Smith, REGISTERED STUDENTAddiction (Substance Use Disorder) Counselor1437492956
- Larhonda Smith, SLPSpeech-Language Pathologist1285883751
- Okeem SmithBehavior Technician1679413702
- Roy SmithRegistered Nurse1083906176
- Chase SnodgrassPhysician Assistant1821826090
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.