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 21 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. Andrew LindseySpeech-Language Assistant1861858656
  2. Anna Liu, D.O.Family Medicine Physician1417143991
  3. Daniel LiuPhysical Therapist1316620537
  4. Elise Liu, PT, DPTPhysical Therapist1326793506
  5. Michelle Liu, LMFTMarriage & Family Therapist1790482909
  6. Liliana Lizcano--ValenzuelaBehavior Technician1205558715
  7. Kevin Lo, PHARMDPharmacist1841837028
  8. Norrette Lohr-Thierry, PH.D.Clinical Psychologist1063445609
  9. John Lok, M.D.Infectious Disease Physician1992713028
  10. Arvely LopezMarriage & Family Therapist1548926090
  11. Edzel John Lopez, DNP, RN, FNP-CNurse Practitioner1538041264
  12. Esperanza LopezMarriage & Family Therapist1841744349
  13. Jennifer LopezOccupational Therapy Assistant1750102869
  14. Jessica LopezBehavior Technician1265195598
  15. Karla Lopez, M.S.Marriage & Family Therapist1952470445
  16. Kory LopezSpeech-Language Assistant1518728492
  17. Trina Lopez, PPS SCHOOL COUNSELORSchool Counselor1477410405
  18. Tierney Loveland-Grace, DPTPhysical Therapist1598158362
  19. Jessica Loverso-BarnhartMental Health Counselor1053944678
  20. Irene Lu, LMFTMarriage & Family Therapist1184177396
  21. Jaylene LuPharmacist1386223527
  22. Katelyn Luddine, MA, CCC-SLPSpeech-Language Pathologist1124787726
  23. Laura Ludlow, M.S.Speech-Language Pathologist1255683793
  24. Jessica LugoMental Health Counselor1942683933
  25. Debora Luken, MFTMarriage & Family Therapist1679592901
  26. Ely Lun-Chial, DDSDentist1619167392
  27. Elaine LunaMarriage & Family Therapist1548706211
  28. Lisa Luna, CPOProsthetist1073744504
  29. Daniel LuongBehavior Technician1972125961
  30. Andy Luu, FNPFamily Nurse Practitioner1417494717
  31. Justin Luu, DPMFoot & Ankle Surgery Podiatrist1629716311
  32. Mai LuuPharmacist1912419516
  33. Mythuy Luu, PHARM.D.Pharmacist1124187943
  34. Tammy LuuBehavior Technician1700443066
  35. Brigitte Ly, LCSWClinical Social Worker1366776874
  36. Dang Ly, PHARMDPharmacist1457017576
  37. Eddie Ly, M.D.Internal Medicine Physician1134650922
  38. Kim Ly, PA-CPhysician Assistant1043017569
  39. Van Ly, O.D.Optometrist1225171713
  40. Colleen Lynch, RPHPharmacist1629329602
  41. Nicole LynchMarriage & Family Therapist1649870395
  42. Mendy Lyons, BTOther Technician1497136626
  43. Janet Ma, DPTPhysical Therapist1467838292
  44. Lauren Maag, PA-CPhysician Assistant1679171896
  45. Justin Phu Gia MachBehavior Technician1639711351
  46. Saul Macias, PA-CPhysician Assistant1730461856
  47. Lorena MacielSchool Psychologist1588525638
  48. Connie MaddoxSchool Psychologist1467313569
  49. Luisa MaderPsychologist1851072581
  50. Daisy MaderaCase Manager/Care Coordinator1497524698

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.