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 40 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. Chinyere Obakhume, PMHNPPsychiatric/Mental Health Nurse Practitioner1134683816
  2. Rindala Obeid, M.D.Family Medicine Physician1821402322
  3. Rachael ObiPsychiatric/Mental Health Nurse Practitioner1760940001
  4. Comfort Obinwanne, NPPrimary Care Nurse Practitioner1366249831
  5. Edgar Ochoa, MDFamily Medicine Physician1780751685
  6. Paulette Ochoa, COTAOccupational Therapy Assistant1700276110
  7. Rhonda Ochoa, NPNurse Practitioner1285782110
  8. Irene Odom, M.D.Pediatrics Physician1033553482
  9. Tommy Oei, MDGastroenterology Physician1033286844
  10. Gagik Oganesyan, M.D., PH.D.MOHS-Micrographic Surgery Physician1467658914
  11. Daniel Ogaz, CRNACertified Registered Nurse Anesthetist1255489175
  12. Chika Oguagha, PMHNPPsychiatric/Mental Health Nurse Practitioner1316546930
  13. Edward Oh, MDInternal Medicine Physician1376284026
  14. Stellamaris Ohakamnu, DOStudent in an Organized Health Care Education/Training Program1669017125
  15. Jeanette OjedaCase Manager/Care Coordinator1558889535
  16. Isioma Okafor, LVNLicensed Vocational Nurse1861950941
  17. Theresa Okeke, PA-CPhysician Assistant1114559176
  18. Cynthia Okoeguale, PMHNPPsychiatric/Mental Health Nurse Practitioner1215276050
  19. Nnennaya Okoronkwo, PMHNPPsychiatric/Mental Health Nurse Practitioner1710458096
  20. Leland Okubo, MDFamily Medicine Physician1568533453
  21. Blessing Okwara, RNRegistered Nurse1841372422
  22. Jude OkworFamily Nurse Practitioner1063163608
  23. Juan Oliva, MDFamily Medicine Physician1023133527
  24. Paula Olivares, PHARMDPharmacist1750639324
  25. Brenda OliverMarriage & Family Therapist1467588269
  26. Michelle Oneil, D.OFamily Medicine Physician1629361688
  27. Jane Ong, MDSurgery Physician1538236351
  28. Meng-Khiang OngStudent in an Organized Health Care Education/Training Program1578268587
  29. Meng-Yung Ong, MDStudent in an Organized Health Care Education/Training Program1023868494
  30. Mabel Onoh, RNPsychiatric/Mental Health Nurse Practitioner1215204003
  31. Pettie OntellMassage Therapist1013524701
  32. Elba OntiverosSocial Worker1992957690
  33. Ukamaka OnyiaFamily Nurse Practitioner1245008028
  34. Giulianna OrdonezRegistered Nurse1902339435
  35. James Orens, MDCardiovascular Disease Physician1912078809
  36. Bertha Oropeza, RN. NPObstetrics & Gynecology Nurse Practitioner1376644369
  37. Angie Orozco, A.B.O.C.Optician1568982924
  38. Andrew OrtegaBehavior Technician1114627239
  39. Anela OrtegaClinical Social Worker1083463897
  40. Christina Ortega, PHARMDPharmacist1881794667
  41. Joseph Ortega, DNPCertified Registered Nurse Anesthetist1467174219
  42. Olivia Ortega, N.P.Obstetrics & Gynecology Nurse Practitioner1083886576
  43. Pauline OrtegaMarriage & Family Therapist1912605502
  44. Rosa Ortega LopezBehavior Technician1821819921
  45. Demetrio OrtizRegistered Respiratory Therapist1932043049
  46. Orlando Ortiz, PA-CPhysician Assistant1710713953
  47. Xatziry Ortiz LopezBehavior Technician1356158901
  48. Kwabena Osei, MD,MPHPediatrics Physician1275732372
  49. Karen Oshiro, MDObstetrics & Gynecology Physician1326196130
  50. Ana Osorio, MDPsychiatry Physician1518015320

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.