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 43 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. Charles Wetter, PA-CMedical Physician Assistant1275591356
  2. Tryniti WeykerMarriage & Family Therapist1861292393
  3. Hannah WhitfieldBehavior Technician1255834339
  4. David WhitsettPsychologist1548742083
  5. Armand Widjaja, M.D.Pediatrics Physician1336335322
  6. Deborah Wieland, PSYD, LMFTMarriage & Family Therapist1245776681
  7. Vijayalakshmi Wijeyakumar, M.D.Nephrology Physician1053491332
  8. Kenneth Wilkens, MDOrthopaedic Trauma Physician1679519649
  9. Alexa Wilkenson, CCC-SLPSpeech-Language Pathologist1720621212
  10. Linda Wilkinson-Taylor, D.C.Chiropractor1689743023
  11. Colleen Williams, MA, BCBA LBABehavior Analyst1073961447
  12. Erin Williams, RBTBehavior Technician1093257065
  13. Gemma Williams, LCSWClinical Social Worker1124218409
  14. Madeline WilliamsMidwife1467184408
  15. Megan Williams, NONERehabilitation Practitioner1588329031
  16. Randal WilliamsContractor1003334152
  17. Patrick Willson, OTOccupational Therapist1790193860
  18. Cole Wilsie, PTAPhysical Therapy Assistant1043896889
  19. Claire Wilson, PH.D.Mental Health Counselor1275524753
  20. Jessica Wilson, RD,CDERegistered Dietitian1932727245
  21. Julie WinnReflexologist1053542399
  22. Kevin WinnOther Technician1922061563
  23. Justin Winters, BTCase Manager/Care Coordinator1821456906
  24. Wendell Witte, M.D.Family Medicine Physician1962416339
  25. Adam Wong, M.D.Anesthesiology Physician1457419046
  26. Arlet WongSpeech-Language Assistant1881478683
  27. Ashley Wong, DOPain Medicine (Physical Medicine & Rehabilitation) Physician1841687472
  28. Janice Wong, PHAM.D.Pharmacist1407980790
  29. Jeffrey Wong, M.D.Orthopaedic Surgery Physician1164790507
  30. Jennifer Wong, M.D.Cardiovascular Disease Physician1013029065
  31. Jennifer Wong, PTAPhysical Therapy Assistant1811870512
  32. Keith Wong, ODOptometrist1568950657
  33. Larry Wong, M.D.Anesthesiology Physician1427001775
  34. Marilyn WongSchool Counselor1922965953
  35. Michael Wong, D.O.Anesthesiology Physician1104082098
  36. Richard Wong, M.D.Geriatric Medicine (Internal Medicine) Physician1659416436
  37. Lynette Woo-Sam, RN, FNP-BCFamily Nurse Practitioner1427716612
  38. Kerry Wood, NPNurse Practitioner1033760772
  39. Alyssa Woolley, BTOther Technician1871094904
  40. Jazmine WorkmanStudent in an Organized Health Care Education/Training Program1740702224
  41. Alexis Worth, NPFamily Nurse Practitioner1679994834
  42. Geoffrey Wrenn, M.A.Marriage & Family Therapist1790214666
  43. Adela WrightMarriage & Family Therapist1982907861
  44. Heather WrightTechnician/Technologist1992366439
  45. Jamie WrightMassage Therapist1528836921
  46. Howard Wu, D.M.D.General Practice Dentistry1194044990
  47. Kin Wai Wu, PTPhysical Therapist1003880899
  48. Stephanie WyckoffObstetrics Physician1679659080
  49. Frank XingNeurology Physician1750792545
  50. Hanna YamaguchiBehavior Technician1154032688

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.