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 9 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. Ennis DearingBehavior Technician1508507286
  2. Lori Debold, M.D.Pediatrics Physician1831194323
  3. Howard Dedes, M.D.Interventional Pain Medicine Physician1679760094
  4. Amy Deeb, SLPSpeech-Language Pathologist1073007852
  5. Jessica Defalco, RDRegistered Dietitian1992429526
  6. Spencer Dehnavi, P.T.Physical Therapist1609234517
  7. Andrea Del Castillo, LMFTMarriage & Family Therapist1932616638
  8. Katie Del RioOther Technician1346789112
  9. James DemarcoIndependent Medical Examiner Chiropractor1447626890
  10. Hailey DemariaStudent in an Organized Health Care Education/Training Program1134040603
  11. Tanya Denne, NDNaturopath1528709243
  12. Douglas Dennis, M.D.Emergency Medicine Physician1639182280
  13. Gian DensingMarriage & Family Therapist1013780006
  14. Pamela Deritis, LMFT151030Marriage & Family Therapist1841966322
  15. Vivian Derr, CPNPPediatric Nurse Practitioner1144203019
  16. Angelina Desanto, LCSWClinical Social Worker1497196596
  17. Joseph Desanto, M.D.Internal Medicine Physician1083687891
  18. Kavita Deshpande, M.D.Family Medicine Physician1467715748
  19. Lauren Devaughn, CNMAdvanced Practice Midwife1194569681
  20. Robert Devereaux, MDFamily Medicine Physician1043264781
  21. Jane Dewilde, MFTIMarriage & Family Therapist1114276904
  22. Bertram Dias, MDPediatrics Physician1780613406
  23. David Diaz, M.D.Specialist1114009693
  24. Lily Diaz, RNCritical Care Medicine Registered Nurse1912589136
  25. Kenia Diaz MolinaCommunity Health Worker1275373276
  26. Erica Dickson, DOObstetrics & Gynecology Physician1245656339
  27. An Dinh, PHARM DPharmacist1245070911
  28. Diana Dinh, CCC-SLPSpeech-Language Pathologist1619504487
  29. Lisa DinhBehavior Technician1346741238
  30. Martin DinhSchool Counselor1396225215
  31. Son Dinh, M.D.Nephrology Physician1174564256
  32. Anh Do, PHARMDPharmacist1144540501
  33. Danh Do, M.D.Anesthesiology Physician1407140080
  34. Karissa Do, O.D.Optometrist1598820433
  35. Kevin DoHematology & Oncology Physician1811384001
  36. Kevin Do, LVNLicensed Vocational Nurse1063919181
  37. Marianne Do, O.D.Optometrist1467623033
  38. Michael Do, M.D.Anesthesiology Physician1235102880
  39. Pauline Do, PHARM. D.Pharmacist1558495994
  40. Peter Do, D.D.S.Dentist1467580084
  41. Quynh DoCommunity Health Worker1720886336
  42. Thach Do, R.PH.Pharmacist1083932677
  43. Thang DoBehavior Analyst1710241070
  44. Tiffany Do, PPSSchool Psychologist1215898531
  45. Jaimee DoanCommunity Health Worker1497554935
  46. Tammie DoanLicensed Practical Nurse1346108990
  47. Trang Doan, RPHPharmacist1013632546
  48. Truong Doan, SLPASpeech-Language Assistant1245473735
  49. Nicholas Doan Van, MD, F.A.C.C. INC.Interventional Cardiology Physician1801922521
  50. Elena Domingo Calvete, LMFTMarriage & Family Therapist1780558692

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.