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 28 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. Natasha Knoten, R.D.Registered Dietitian1427205129
  2. Jennifer Knowles, MDCardiovascular Disease Physician1699846592
  3. Tiffany Knowlton, LMFTMarriage & Family Therapist1932322393
  4. Linda Knudtson, MDObstetrics & Gynecology Physician1689745622
  5. Steven Ko, MDInternal Medicine Physician1194135780
  6. Constance Koenig, CRNACertified Registered Nurse Anesthetist1174671002
  7. Reshma KoenigPsychiatric/Mental Health Nurse Practitioner1780471128
  8. Chang Koh, MDObstetrics & Gynecology Physician1952459851
  9. Nathan Koh, PA-CPhysician Assistant1346113651
  10. Neelu Kohli, M.D.Emergency Medicine Physician1366645616
  11. Carlette Kolesnik, P.A.-C.Surgical Physician Assistant1760594733
  12. Ravi Konchigeri, M.D.Cardiovascular Disease Physician1194767459
  13. Lawrence Kong, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1689741407
  14. Nanditha Kongara, MDFamily Medicine Physician1144397985
  15. Sean Koon, MDAddiction Medicine (Internal Medicine) Physician1285701128
  16. Mostafa KoperlyDentist1417346727
  17. Thoyaja Koritala, M.D.Hospitalist Physician1528354024
  18. Thelma Korpman, MDAnesthesiology Physician1558420158
  19. Bruce Koyle, DOFamily Medicine Physician1710054697
  20. Maher Kozman, MDChild & Adolescent Psychiatry Physician1700957602
  21. Puiling Kraft, PHARM.D.Pharmacist1316118920
  22. Edita Krakora, M.D.Family Medicine Physician1134442080
  23. Lewis Kramer, MDDermatology Physician1255408266
  24. Jamie Krantzberg, PAPhysician Assistant1629137351
  25. Sin Ku, MDFamily Medicine Physician1912074857
  26. Emanuel Kuenzig, RNPsychiatric/Mental Health Registered Nurse1730385352
  27. Gary Kukura, PAPhysician Assistant1215096946
  28. Jinny Kung, CNMAdvanced Practice Midwife1649396888
  29. Connie Kuykendall, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1053280685
  30. Christine Kwak, MDOrthopaedic Surgery Physician1588655898
  31. Kyu Kwak, MDObstetrics & Gynecology Physician1962550863
  32. Sheryl Kwak, M.D.Surgery Physician1104065259
  33. Cristalle Kwok, ODOptometrist1801618103
  34. Maria Celeste Labajo, RNP-BCFamily Nurse Practitioner1497225965
  35. Usama LabibPharmacist1003355769
  36. Anissa Lacount, MDFamily Medicine Physician1609854397
  37. Sarah LadhaniGeneral Practice Dentistry1831886357
  38. Danielle Lafleur-Do, PHARMDPharmacist1437858750
  39. Paulina Laguna, LCSWClinical Social Worker1689888216
  40. David Lah, MDPediatrics Physician1184795114
  41. Fred Lai, M.D.Internal Medicine Physician1649476128
  42. Lawrence Lai, M.D., M.S.Pain Medicine Physician1598927832
  43. William Lai, MDInternal Medicine Physician1528180361
  44. Marien Lake, NPNurse Practitioner1881761641
  45. Seven LakeyBehavior Technician1831069004
  46. Michelle Laksana, PA-CPhysician Assistant1851709414
  47. Victor Lalama, D.C.Chiropractor1881680320
  48. Manouchehr Lalehzarian, MDUrology Physician1255402228
  49. Simon Lalehzarian, MD, MHA, MSStudent in an Organized Health Care Education/Training Program1871436832
  50. Andre Lallande, D.O.Rheumatology Physician1053471045

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.