NPPES file of Aug 9, 2026

Doctors and health care providers in Fountain Valley, CA

2,190 individual NPPES records list a practice address in Fountain Valley, 99th of 812 California cities. The largest group is behavior technician: 207, 9% of the city's records, against 18% across California. Page 28 of 44.

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

The 8 largest groups in Fountain Valley

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Fountain Valley in California

  • Rank in California99th of 812 cities by records
  • Share of the state0.2% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups20.6% of all records

Compared with California as a whole, Fountain Valley has 15.6× the state's share of other technician records and 0.31× its share of student in an organized health care education/training program records.

Providers in Fountain Valley, alphabetically

  1. Phuong Nguyen, D.C.Chiropractor1801935002
  2. Phuong Nguyen, PHARM. DPharmacist1689796138
  3. Quan Nguyen, M.D.Specialist1760402770
  4. Quy Nguyen, D.C.Chiropractor1083934459
  5. Quyen NguyenBehavior Technician1265015598
  6. Quynh Nguyen, M.A, BCBABehavior Analyst1740539659
  7. Quynh-Nhu Nguyen, PHARM.D.Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1326208190
  8. Richard NguyenBehavior Technician1508508474
  9. Rose Nguyen, SLPASpeech-Language Assistant1033352000
  10. Shawn Nguyen, PHARMDPharmacist1770851206
  11. Sheila Nguyen, MDInternal Medicine Physician1033435987
  12. Son Nguyen, PHARM.D.Pharmacist1912682154
  13. Stanley NguyenInternal Medicine Physician1164954145
  14. Taylor NguyenCounselor1336806249
  15. Thang Nguyen, MDSurgery Physician1831279009
  16. Thanh Nguyen, M.D.Otolaryngology Physician1508862061
  17. Thanh NguyenPediatrics Physician1245431915
  18. Thanh Nguyen, FNPNurse Practitioner1972998094
  19. Thanh Nguyen, DMDGeneral Practice Dentistry1477022655
  20. Thanh Duc Nguyen, DMDDentist1093854788
  21. Thao NguyenFamily Nurse Practitioner1932666955
  22. Thien Nguyen, PHARM.D.Pharmacist1760500979
  23. Thomas Nguyen, D.C.Chiropractor1811029960
  24. Thomas Nguyen, D.D.S.General Practice Dentistry1811107980
  25. Thu Huyen Nguyen, PHARM D.Pharmacist1174656649
  26. Thu Vinh Nguyen, PA-CPhysician Assistant1831045541
  27. Tien Nguyen, MDDermatology Physician1396741351
  28. Tien Nguyen, MDNeurological Surgery Physician1356385025
  29. Tiep Nguyen, DDSGeneral Practice Dentistry1851461016
  30. Tiffany NguyenPharmacist1699918623
  31. Tiffeny NguyenSpeech-Language Pathologist1205665882
  32. Timothy Nguyen, DDSGeneral Practice Dentistry1164249181
  33. Tracy Nguyen, PHARMDPharmacist1770910697
  34. Tracy NguyenMental Health Counselor1013317528
  35. Tracy Nguyen, PHARMDPharmacist1689456329
  36. Tri Nguyen, M.D.Ophthalmology Physician1669436002
  37. Trong Nguyen, MDSports Medicine (Orthopaedic Surgery) Physician1427221134
  38. Trongdavid NguyenBehavior Technician1326503608
  39. Trung Nguyen, M.D.Ophthalmology Physician1316941966
  40. Tu Nguyen, MDAnesthesiology Physician1114931961
  41. Tuan Nguyen, M.D.Interventional Cardiology Physician1669644951
  42. Van Nguyen, PHARMACISTPharmacist1780809178
  43. Vina Nguyen, M. D.Hospitalist Physician1013250497
  44. Vu NguyenFoot & Ankle Surgery Podiatrist1629478094
  45. Vu NguyenBehavior Technician1427771898
  46. Xuanmai NguyenRegistered Dietitian1083022941
  47. Yvonne NguyenPain Management Pharmacist1124983390
  48. Diana Nguyen Pham, MDFamily Medicine Physician1013064005
  49. Catherine Nguyen-Loh, DOFamily Medicine Physician1558828848
  50. Tramy Nguyen-Mok, M.D.Pediatrics Physician1144322645

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

Fountain Valley, California appears in the CMS National Plan and Provider Enumeration System with 2,190 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 Fountain Valley - 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 Fountain Valley 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 Fountain Valley is weighted toward Behavior Technician (207 clinicians, followed by Pharmacist with 144 and Marriage & Family Therapist with 101). 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, Fountain Valley reports roughly 5.6 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, Addiction (Substance Use Disorder) Counselor is the most prominent one with no provider currently listing a Fountain Valley practice address, a coverage gap Fountain Valley patients typically fill by traveling to a larger nearby hub.

For Fountain Valley 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 Fountain Valley, CA?

There are 2,190 registered healthcare providers in Fountain Valley, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Fountain Valley?

The most common specialties in Fountain Valley are Behavior Technician, Pharmacist, Marriage & Family Therapist, Internal Medicine Physician, Other Technician. Behavior Technician has the most providers with 207.

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.