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 26 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. Frank Ngo, DPTPhysical Therapist1801241575
  2. Hoai-Han NgoPharmacist1457061954
  3. Hung Ngo, DPTPhysical Therapist1346482106
  4. Laura Ngo, MDAnesthesiology Physician1528365681
  5. Vinh Ngo, PAPhysician Assistant1386796118
  6. Kelsey Ngole, FNPFamily Nurse Practitioner1083177125
  7. Alexander Nguyen, DMDGeneral Practice Dentistry1073037891
  8. Alyssa Nguyen, PHARM.D.Pharmacist1295221604
  9. Amy NguyenPhysician Assistant1144934324
  10. An Nguyen, RPHPharmacist1366814360
  11. An NguyenGeneral Practice Dentistry1992157804
  12. Andrew NguyenStudent in an Organized Health Care Education/Training Program1255175196
  13. Andy NguyenBehavior Technician1629719497
  14. Angela Nguyen, AMFT, APCCMental Health Counselor1871346577
  15. Angelica NguyenStudent in an Organized Health Care Education/Training Program1063640290
  16. Anhduong Nguyen, PHARMDPharmacist1073165155
  17. Bich Thu NguyenNurse Practitioner1841912771
  18. Bichlien Nguyen, M.D.Hematology & Oncology Physician1417912239
  19. Bichlien NguyenCase Manager/Care Coordinator1639929409
  20. Binh Nguyen, PHARM.D.Pharmacist1194853291
  21. Brian NguyenPharmacist1982013538
  22. Candice NguyenInterpreter1124976360
  23. Carolyn Nguyen, PHARMDPharmacist1760209175
  24. Casie Nguyen, FNPFamily Nurse Practitioner1801155726
  25. Catherine NguyenSocial Worker1487256806
  26. Chi Nguyen, M.D.Personal Emergency Response Attendant1972569903
  27. Christina Nguyen, MDNeuromuscular Medicine (Psychiatry & Neurology) Physician1508186701
  28. Christine Nguyen, M.D.Ophthalmology Physician1780017897
  29. Christopher Nguyen, D.D.S.Dentist1497932891
  30. Cindy Nguyen, LMFTMarriage & Family Therapist1700339306
  31. Dana NguyenBehavior Technician1790437325
  32. Daniel Nguyen, PA-CMedical Physician Assistant1962047365
  33. Daniel NguyenPhysician Assistant1982410684
  34. Darius NguyenBehavior Technician1437614716
  35. David Nguyen, MDPediatric Adolescent Medicine Physician1699845156
  36. David NguyenBehavior Technician1548850365
  37. David Nguyen, PTAPhysical Therapy Assistant1164270708
  38. Denise Nguyen, LMFTMarriage & Family Therapist1881844850
  39. Dewey Nguyen, PHARMDPharmacist1609413707
  40. Doanh Nguyen, M.D.Specialist1720090921
  41. Duc Thanh Nguyen, PHARMDPharmacist1740811884
  42. Duke Nguyen, MDGastroenterology Physician1679557797
  43. Dung Nguyen, PHARMD.Pharmacist1104948652
  44. Elizabeth Nguyen, D.O.Ophthalmology Physician1689891640
  45. Elizabeth Nguyen, LMTMassage Therapist1063022663
  46. Franchesca Nguyen, D.C.Chiropractor1184189128
  47. Francie Nguyen, PHARMDPharmacist1578119798
  48. Francienne Nguyen, PHARM DPharmacist1649491036
  49. Giang Nguyen, PHARM.D.Pharmacist1255463634
  50. Hanh Nguyen, PHARM.D.Pharmacist1669991956

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.