2026 data CMS NPPES NUCC Taxonomy

Doctors in Fountain Valley, CA

Active healthcare providers in Fountain Valley sourced from the CMS NPPES weekly file — no proprietary ratings, no editorial scores. NPI counts, specialty distribution, and primary practice addresses refreshed each release.

2,193
Providers
CMS NPPES-registered
20
Specialties
NUCC taxonomy codes
Behavior Technician
Top specialty
205 providers
California
State
CA

2,193 healthcare providers across 20 specialties

Fountain Valley, California appears in the CMS National Plan and Provider Enumeration System with 2,193 registered healthcare providers spanning 20 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.

The provider mix in Fountain Valley is weighted toward Behavior Technician (205 clinicians, followed by Pharmacist with 142 and Marriage & Family Therapist with 103). 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.

For Fountain Valley patients, this directory is most useful as a starting shortlist — searching by specialty narrows the 690-taxonomy roster to clinicians with the relevant training, and each provider page links to NPI, state licensing boards, and the NPPES registry for credential verification. 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 NPPES data is self-reported and refreshed monthly, so listing details may be out of date; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients. Nothing on this page substitutes for consulting a licensed clinician about your personal health decisions.

2,193
Providers
20
Specialties
5.6
Per 100K (state)

Which specialties are most common in Fountain Valley

Behavior Technician 205
Pharmacist 142
Marriage & Family Therapist 103
Internal Medicine Physician 95
Other Technician 74
Physician Assistant 65
Clinical Social Worker 60
Mental Health Counselor 55
Physical Therapist 53
Chiropractor 52
Family Medicine Physician 46
Anesthesiology Physician 45
Family Nurse Practitioner 43
Pediatrics Physician 43
Specialist 43
Dentist 43
General Practice Dentistry 41
Rehabilitation Practitioner 40
Student in an Organized Health Care Education/Training Program 38
Social Worker 36

Healthcare Providers (Page 9)

Name
ENNIS DEARING
Behavior Technician
LORI DEBOLD, M.D.
Pediatrics Physician
HOWARD DEDES, M.D.
Pain Medicine (Physical Medicine & Rehabilitation) Physician
AMY DEEB, SLP
Speech-Language Pathologist
JESSICA DEFALCO, RD
Registered Dietitian
SPENCER DEHNAVI, P.T.
Physical Therapist
ANDREA DEL CASTILLO, LMFT
Marriage & Family Therapist
KATIE DEL RIO
Other Technician
JAMES DEMARCO
Independent Medical Examiner Chiropractor
TANYA DENNE, ND
Naturopath
DOUGLAS DENNIS, M.D.
Emergency Medicine Physician
GIAN DENSING
Marriage & Family Therapist
PAMELA DERITIS, LMFT151030
Marriage & Family Therapist
VIVIAN DERR, CPNP
Pediatric Nurse Practitioner
LAUREN DEVAUGHN, CNM
Advanced Practice Midwife
ROBERT DEVEREAUX, MD
Family Medicine Physician
JANE DEWILDE, MFTI
Marriage & Family Therapist
BERTRAM DIAS, MD
Pediatrics Physician
DAVID DIAZ, M.D.
Specialist
LILY DIAZ, RN
Critical Care Medicine Registered Nurse
KENIA DIAZ MOLINA
Community Health Worker
ERICA DICKSON, DO
Obstetrics & Gynecology Physician
AN DINH, PHARM D
Pharmacist
DIANA DINH, CCC-SLP
Speech-Language Pathologist
LISA DINH
Behavior Technician
MARTIN DINH
School Counselor
SON DINH, M.D.
Internal Medicine Physician
ANH DO, PHARMD
Pharmacist
DANH DO, M.D.
Anesthesiology Physician
KARISSA DO, O.D.
Optometrist
KEVIN DO
Hematology & Oncology Physician
KEVIN DO, LVN
Licensed Vocational Nurse
MARIANNE DO, O.D.
Optometrist
MICHAEL DO, M.D.
Anesthesiology Physician
PAULINE DO, PHARM. D.
Pharmacist
PETER DO, D.D.S.
Dentist
QUYNH DO
Community Health Worker
THACH DO, R.PH.
Pharmacist
THANG DO
Behavior Analyst
TIFFANY DO, PPS
School Psychologist
JAIMEE DOAN
Community Health Worker
TAMMIE DOAN
Licensed Practical Nurse
TRANG DOAN, RPH
Pharmacist
TRUONG DOAN, SLPA
Speech-Language Assistant
XUAN HAO DOAN, PA
Medical Physician Assistant
NICHOLAS DOAN VAN, MD, F.A.C.C. INC.
Specialist
ELENA DOMINGO CALVETE, LMFT
Marriage & Family Therapist
SAMANTHA DOMINGUES, COTA/L
Occupational Therapy Assistant
KAREN DON, MD
Internal Medicine Physician
ALBERT DONG
Pharmacist

Nearby Cities in California

Other California cities with provider coverage in the CMS NPPES registry.

Compare specialties side-by-side →

Frequently Asked Questions

How many doctors are in Fountain Valley, CA?
There are 2,193 registered healthcare providers in Fountain Valley, CA, covering 20 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 205.

Provider data from CMS NPPES (download.cms.gov/nppes); specialty classification from NUCC Health Care Provider Taxonomy. PlainDoctor does not rate or rank providers. Methodology · About

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from CMS National Plan and Provider Enumeration System (NPPES). Consult a qualified professional before making decisions based on this data.