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.
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
- Ennis DearingBehavior Technician1508507286
- Lori Debold, M.D.Pediatrics Physician1831194323
- Howard Dedes, M.D.Interventional Pain Medicine Physician1679760094
- Amy Deeb, SLPSpeech-Language Pathologist1073007852
- Jessica Defalco, RDRegistered Dietitian1992429526
- Spencer Dehnavi, P.T.Physical Therapist1609234517
- Andrea Del Castillo, LMFTMarriage & Family Therapist1932616638
- Katie Del RioOther Technician1346789112
- James DemarcoIndependent Medical Examiner Chiropractor1447626890
- Hailey DemariaStudent in an Organized Health Care Education/Training Program1134040603
- Tanya Denne, NDNaturopath1528709243
- Douglas Dennis, M.D.Emergency Medicine Physician1639182280
- Gian DensingMarriage & Family Therapist1013780006
- Pamela Deritis, LMFT151030Marriage & Family Therapist1841966322
- Vivian Derr, CPNPPediatric Nurse Practitioner1144203019
- Angelina Desanto, LCSWClinical Social Worker1497196596
- Joseph Desanto, M.D.Internal Medicine Physician1083687891
- Kavita Deshpande, M.D.Family Medicine Physician1467715748
- Lauren Devaughn, CNMAdvanced Practice Midwife1194569681
- Robert Devereaux, MDFamily Medicine Physician1043264781
- Jane Dewilde, MFTIMarriage & Family Therapist1114276904
- Bertram Dias, MDPediatrics Physician1780613406
- David Diaz, M.D.Specialist1114009693
- Lily Diaz, RNCritical Care Medicine Registered Nurse1912589136
- Kenia Diaz MolinaCommunity Health Worker1275373276
- Erica Dickson, DOObstetrics & Gynecology Physician1245656339
- An Dinh, PHARM DPharmacist1245070911
- Diana Dinh, CCC-SLPSpeech-Language Pathologist1619504487
- Lisa DinhBehavior Technician1346741238
- Martin DinhSchool Counselor1396225215
- Son Dinh, M.D.Nephrology Physician1174564256
- Anh Do, PHARMDPharmacist1144540501
- Danh Do, M.D.Anesthesiology Physician1407140080
- Karissa Do, O.D.Optometrist1598820433
- Kevin DoHematology & Oncology Physician1811384001
- Kevin Do, LVNLicensed Vocational Nurse1063919181
- Marianne Do, O.D.Optometrist1467623033
- Michael Do, M.D.Anesthesiology Physician1235102880
- Pauline Do, PHARM. D.Pharmacist1558495994
- Peter Do, D.D.S.Dentist1467580084
- Quynh DoCommunity Health Worker1720886336
- Thach Do, R.PH.Pharmacist1083932677
- Thang DoBehavior Analyst1710241070
- Tiffany Do, PPSSchool Psychologist1215898531
- Jaimee DoanCommunity Health Worker1497554935
- Tammie DoanLicensed Practical Nurse1346108990
- Trang Doan, RPHPharmacist1013632546
- Truong Doan, SLPASpeech-Language Assistant1245473735
- Nicholas Doan Van, MD, F.A.C.C. INC.Interventional Cardiology Physician1801922521
- Elena Domingo Calvete, LMFTMarriage & Family Therapist1780558692
The largest California cities
- Los Angeles69,537
- San Diego52,937
- San Francisco38,143
- Sacramento33,083
- San Jose20,925
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.