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 22 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. Darla MadrigalBehavior Technician1174226419
  2. Betty Madsen, LPCCMental Health Counselor1194165852
  3. Theresa Maestas, MDEmergency Medicine Physician1043242373
  4. Nancy MaganaBehavior Technician1609599042
  5. Glenn Magarian, B.S.,D.C.Chiropractor1023318391
  6. Hugh Magnuson, RBTOther Technician1407214547
  7. Alyxis Mah, PA-CPhysician Assistant1861016685
  8. Mehrdad Mahdad, M.D.Neurology Physician1225092190
  9. Erin Mahdavi, RNRegistered Nurse1003764267
  10. Ana Maheshwari, MDRheumatology Physician1306259130
  11. Usama Mahmood, MDRadiation Oncology Physician1386848844
  12. Cyril Mahood, MDOtolaryngology Physician1598762742
  13. David Mai, M.D.Diagnostic Radiology Physician1962589242
  14. Thuy Mai, CAMTCMassage Therapist1568729838
  15. Paul Maistros, M.D.Sleep Medicine (Psychiatry & Neurology) Physician1275532301
  16. Amber Majick, BCBABehavior Analyst1326568544
  17. Thanuja MajuranBehavior Technician1568963205
  18. Kerollos Makrmalla, ATCAthletic Trainer1700461480
  19. Erin Malecha, P.T.Sports Medicine (Neuromusculoskeletal Medicine) Physician1518909241
  20. Kamini Malhotra, MDAnatomic Pathology & Clinical Pathology Physician1235134263
  21. Elisabeth Malin, M.D.Pediatrics Physician1134390495
  22. Roland John Mallari, PT, DPTPhysical Therapist1942147798
  23. Geremy MamaclayStudent in an Organized Health Care Education/Training Program1871039354
  24. Gaytri Manek, MDNephrology Physician1124298237
  25. Janninne ManjarrezBehavior Technician1346719580
  26. Hannah Manning, PA-CMedical Physician Assistant1780378521
  27. Adrian ManriqueMental Health Counselor1497825426
  28. Sal Manrriquez, D.D.S.Dentist1154547651
  29. Rashad Mansour, D.C.Chiropractor1760821334
  30. Maha ManswerMarriage & Family Therapist1164219523
  31. Lincoln Manzi, MD, INCOphthalmology Physician1376592188
  32. Eder Mares, BARehabilitation Practitioner1639678584
  33. Brisela MarinBehavior Technician1841061363
  34. Kaylan Maring, RBTOther Technician1548799943
  35. Kelly Markle, PA-CPhysician Assistant1407488398
  36. Ashley MarmolejoBehavior Technician1851118517
  37. Manish Marolia, M.D.Pediatrics Physician1962581363
  38. Charlene MarquezMental Health Counselor1841523222
  39. Georgina Marquez, DVMInternal Medicine Physician1194246934
  40. Jennifer MarquezCase Manager/Care Coordinator1407470669
  41. Alejandra Marquez-MunozRehabilitation Practitioner1356863195
  42. Natalie MarroquinBehavior Technician1104547645
  43. Richanne Marshall, LMFTMarriage & Family Therapist1952582363
  44. Christine MartinezStudent in an Organized Health Care Education/Training Program1902231228
  45. Jamin MartinezBehavior Technician1669286852
  46. Jennifer Martinez, BTOther Technician1407224041
  47. Jonathan MartinezBehavior Technician1841912854
  48. Lourdes MartinezBehavior Technician1760105100
  49. Melissa Martinez, MSWClinical Social Worker1841577079
  50. Roxanne MartinezAcute Care Nurse Practitioner1477951689

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.