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 14 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. Doe HaiPharmacist1851669881
  2. Hamid Hajarian, M.D., D.D.S.Oral & Maxillofacial Surgery (D.M.D.)1982867271
  3. Chris Halamandaris, D.C.Chiropractor1255400297
  4. Lilia HalitovBehavior Technician1780299347
  5. Stephanie HallMarriage & Family Therapist1891141073
  6. Tira HallMarriage & Family Therapist1639865058
  7. Lillee Hamilton-TaylorCommunity Health Worker1578210647
  8. Dong Han, M.D.Anesthesiology Physician1588613715
  9. Nancy Han, M.D.Gastroenterology Physician1609055300
  10. William Han, M.D.Urogynecology and Reconstructive Pelvic Surgery (Obstetrics & Gynecology) Physician1043300114
  11. Johanna Hanawi, NPNurse Practitioner1265593891
  12. Karim Hanna, MDAnesthesiology Physician1609170042
  13. Monica Hanna, D.O.Internal Medicine Physician1447870365
  14. Nancy Hanna, M.D.Internal Medicine Physician1205994092
  15. Lynn Hansen, CNMMidwife1063597219
  16. Rachel Hargrove, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1871812727
  17. James Hariyanto, PHARMDPharmacist1417837204
  18. Jacquelyn HarlanPsychologist1134563133
  19. Diane Harris, MDPsychiatry Physician1225041023
  20. Christian Harrison, PHARM.D.Pharmacist1740420371
  21. Deborah HarropFamily Nurse Practitioner1649925421
  22. Asif Harsolia, M.D.Radiation Oncology Physician1376565374
  23. Sarah Hassan, M.DHematology & Oncology Physician1689935066
  24. Hisayo Hatakeyama, L.AC.Acupuncturist1750411013
  25. Brittany Hatfield, LVNLicensed Vocational Nurse1770823080
  26. Ruby HatterBehavior Technician1861113391
  27. Alexander Haueisen, MDOphthalmology Physician1073193611
  28. Eleanor Hawkins, M.D.Obstetrics & Gynecology Physician1235366949
  29. Nicolette Head, N.P.Family Nurse Practitioner1508236993
  30. Rosemary HealyMental Health Counselor1831521137
  31. Kayla Heath, ATCAthletic Trainer1629512074
  32. Bianca Heilman, RDRegistered Dietitian1821615121
  33. Allison HeisserBehavior Technician1821716911
  34. Beate Heller, DCChiropractor1003890773
  35. Cambria Hembree, MDInternal Medicine Physician1356542229
  36. Heather Hendron, RDRegistered Dietitian1770252470
  37. Allan HeremMarriage & Family Therapist1851403547
  38. Mitzi Hermann, MSW, INTERNClinical Social Worker1821498486
  39. Jennifer Hernandez, LCSWClinical Social Worker1740793751
  40. Veronica HernandezRehabilitation Practitioner1710879945
  41. Adriana HerreraBehavior Technician1457073868
  42. Anayeli HerreraCase Manager/Care Coordinator1245972421
  43. Brenda HerreraRehabilitation Practitioner1033790571
  44. Phyllis Herring, M.A., CCC-SLPSpeech-Language Pathologist1720147234
  45. Genevieve HilarioBehavior Technician1912795931
  46. Aretha HillBehavior Technician1124528302
  47. Robert Himes, D.C.Chiropractor1912443052
  48. Elena HinojosaBehavior Technician1053182584
  49. Ronald Hitzfield, M.D.Emergency Medicine Physician1164435715
  50. Alan Ho, M.D.Pain Medicine (Anesthesiology) Physician1154565612

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.