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.
The 8 largest groups in Fontana
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
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
- Chinyere Obakhume, PMHNPPsychiatric/Mental Health Nurse Practitioner1134683816
- Rindala Obeid, M.D.Family Medicine Physician1821402322
- Rachael ObiPsychiatric/Mental Health Nurse Practitioner1760940001
- Comfort Obinwanne, NPPrimary Care Nurse Practitioner1366249831
- Edgar Ochoa, MDFamily Medicine Physician1780751685
- Paulette Ochoa, COTAOccupational Therapy Assistant1700276110
- Rhonda Ochoa, NPNurse Practitioner1285782110
- Irene Odom, M.D.Pediatrics Physician1033553482
- Tommy Oei, MDGastroenterology Physician1033286844
- Gagik Oganesyan, M.D., PH.D.MOHS-Micrographic Surgery Physician1467658914
- Daniel Ogaz, CRNACertified Registered Nurse Anesthetist1255489175
- Chika Oguagha, PMHNPPsychiatric/Mental Health Nurse Practitioner1316546930
- Edward Oh, MDInternal Medicine Physician1376284026
- Stellamaris Ohakamnu, DOStudent in an Organized Health Care Education/Training Program1669017125
- Jeanette OjedaCase Manager/Care Coordinator1558889535
- Isioma Okafor, LVNLicensed Vocational Nurse1861950941
- Theresa Okeke, PA-CPhysician Assistant1114559176
- Cynthia Okoeguale, PMHNPPsychiatric/Mental Health Nurse Practitioner1215276050
- Nnennaya Okoronkwo, PMHNPPsychiatric/Mental Health Nurse Practitioner1710458096
- Leland Okubo, MDFamily Medicine Physician1568533453
- Blessing Okwara, RNRegistered Nurse1841372422
- Jude OkworFamily Nurse Practitioner1063163608
- Juan Oliva, MDFamily Medicine Physician1023133527
- Paula Olivares, PHARMDPharmacist1750639324
- Brenda OliverMarriage & Family Therapist1467588269
- Michelle Oneil, D.OFamily Medicine Physician1629361688
- Jane Ong, MDSurgery Physician1538236351
- Meng-Khiang OngStudent in an Organized Health Care Education/Training Program1578268587
- Meng-Yung Ong, MDStudent in an Organized Health Care Education/Training Program1023868494
- Mabel Onoh, RNPsychiatric/Mental Health Nurse Practitioner1215204003
- Pettie OntellMassage Therapist1013524701
- Elba OntiverosSocial Worker1992957690
- Ukamaka OnyiaFamily Nurse Practitioner1245008028
- Giulianna OrdonezRegistered Nurse1902339435
- James Orens, MDCardiovascular Disease Physician1912078809
- Bertha Oropeza, RN. NPObstetrics & Gynecology Nurse Practitioner1376644369
- Angie Orozco, A.B.O.C.Optician1568982924
- Andrew OrtegaBehavior Technician1114627239
- Anela OrtegaClinical Social Worker1083463897
- Christina Ortega, PHARMDPharmacist1881794667
- Joseph Ortega, DNPCertified Registered Nurse Anesthetist1467174219
- Olivia Ortega, N.P.Obstetrics & Gynecology Nurse Practitioner1083886576
- Pauline OrtegaMarriage & Family Therapist1912605502
- Rosa Ortega LopezBehavior Technician1821819921
- Demetrio OrtizRegistered Respiratory Therapist1932043049
- Orlando Ortiz, PA-CPhysician Assistant1710713953
- Xatziry Ortiz LopezBehavior Technician1356158901
- Kwabena Osei, MD,MPHPediatrics Physician1275732372
- Karen Oshiro, MDObstetrics & Gynecology Physician1326196130
- Ana Osorio, MDPsychiatry Physician1518015320
The largest California cities
- Los Angeles69,537
- San Diego52,937
- San Francisco38,143
- Sacramento33,083
- San Jose20,925
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.