NPPES file of Aug 9, 2026

Doctors and health care providers in Fontana, CA

3,012 individual NPPES records list a practice address in Fontana, 77th of 812 California cities. The largest group is pharmacist: 227, 8% of the city's records, against 3% across California. Page 39 of 61.

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

Fontana in California

  • Rank in California77th of 812 cities by records
  • Share of the state0.3% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups20.5% of all records

Compared with California as a whole, Fontana has 7.8× the state's share of certified registered nurse anesthetist records and 0.26× its share of behavior technician records.

Providers in Fontana, alphabetically

  1. Huy NguyenStudent in an Organized Health Care Education/Training Program1255911103
  2. J Duc Nguyen, M.D.Internal Medicine Physician1427018456
  3. Jennifer Nguyen, O.D.Optometrist1194033183
  4. Jimmy NguyenBehavior Technician1053246132
  5. Kathlene NguyenNurse Practitioner1699415620
  6. Khoa Nguyen, MDFamily Medicine Physician1225590078
  7. Kim Bich NguyenPharmacist1912419318
  8. Loc Nguyen, MDAnesthesiology Physician1104026509
  9. Marilyn NguyenDentist1588022065
  10. Ngoc Patrick Nguyen, MDColon & Rectal Surgery Physician1417153552
  11. Patrick NguyenBehavior Technician1053272054
  12. Pheobe Nguyen, O.D.Optometrist1891247581
  13. Phong Nguyen, PHARM.DPharmacist1386731735
  14. Phuc NguyenPhysical Therapist1669696977
  15. Randy NguyenStudent in an Organized Health Care Education/Training Program1942141130
  16. Raymond NguyenRegistered Nurse1477438257
  17. Tao Nguyen, M.D.Emergency Medicine Physician1598722506
  18. Thomas Nguyen, D.M.D.Orthodontics and Dentofacial Orthopedics Dentistry1609965888
  19. Tien Nguyen, PHARM.D.Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1730471087
  20. Tiffany Nguyen, PHARMDPharmacist1619329463
  21. Tin Nguyen, MDInternal Medicine Physician1386703908
  22. Tina Nguyen, MDEmergency Medicine Physician1174789630
  23. Trang NguyenPharmacist1770022824
  24. Trevor Nguyen, DOStudent in an Organized Health Care Education/Training Program1790312791
  25. Uyenphuong Esther Nguyen, PHARM.DPharmacist1528330438
  26. Vananh Nguyen, PHARM DPharmacist1912288861
  27. Willson NguyenStudent in an Organized Health Care Education/Training Program1780526772
  28. Lan Nguyen Ross, PHARMDPharmacist1144315995
  29. Joan Nguyen-Khait, MDPediatrics Physician1962705533
  30. Ching-Long Ni, MDBody Imaging Physician1518038595
  31. Blanca Nicassio, AMFTMental Health Counselor1538623004
  32. Ida Nieuwenhuizen, PAPhysician Assistant1447327291
  33. Sukhmeet NijjrahEmergency Medical Services (Emergency Medicine) Physician1225800568
  34. Bianca Nino-LanathouaDentist1396474813
  35. Yasuhiro Nishiura, M.D.Pediatrics Physician1225128770
  36. David Niu, M.D.Anesthesiology Physician1427256502
  37. Ivy NjolomaCritical Care Medicine Nurse Practitioner1568641868
  38. Erin Nolte-Hough, DOFamily Medicine Physician1942002977
  39. Mahin Nosrati-Jahromi, DDSGeneral Practice Dentistry1568633139
  40. Nabil Noujaim, MDEmergency Medicine Physician1942358924
  41. Gabrielle NovellaMarriage & Family Therapist1558008128
  42. Cedric NowatzykBehavior Technician1972438059
  43. Linda Nugen, L.C.S.W.Clinical Social Worker1801039532
  44. Andrea NunezBehavior Technician1447994017
  45. Daniel Nunez, LCSWClinical Social Worker1750585899
  46. Maria Nunez-FloresMarriage & Family Therapist1801271499
  47. Martha Nyingi, REGISTERED NURSERegistered Nurse1962153338
  48. Soworwon NyiradyPhysical Therapist1285877118
  49. Gregory NyxPeer Specialist1518502525
  50. Kimberly O'Neill, MSPTPhysical Therapist1447561089

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

Fontana, California appears in the CMS National Plan and Provider Enumeration System with 3,012 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 Fontana - 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 Fontana 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 Fontana is weighted toward Pharmacist (227 clinicians, followed by Family Medicine Physician with 198 and Student in an Organized Health Care Education/Training Program with 193). 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, Fontana reports roughly 7.7 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, Mental Health Counselor is the most prominent one with no provider currently listing a Fontana practice address, a coverage gap Fontana patients typically fill by traveling to a larger nearby hub.

For Fontana 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 Fontana, CA?

There are 3,012 registered healthcare providers in Fontana, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Fontana?

The most common specialties in Fontana are Pharmacist, Family Medicine Physician, Student in an Organized Health Care Education/Training Program, Behavior Technician, Internal Medicine Physician. Pharmacist has the most providers with 227.

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.