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

Where this city sits in the corpus

Fountain Valley ranks 96th among 805 California cities by CMS provider count, holding 0.2% of the state's NPIs, led by Behavior Technician.

2,193
NPPES providers in city
96th
of 805 CA cities
0.2%
of California providers
20.5%
in top 3 specialties

Fountain Valley ranks #11 of 10 California cities for Behavior Technician.

Where Fountain Valley ranks among California cities

Provider count vs every California city in CMS NPPES (805 cities)

2,193 Top 12% higher than 88% of 805 cities

0–200: 398 cities (49%). Below this entry. 200–400: 103 cities (13%). Below this entry. 400–600: 45 cities (6%). Below this entry. 600–800: 48 cities (6%). Below this entry. 800–1,000: 29 cities (4%). Below this entry. 1,000–1,200: 15 cities (2%). Below this entry. 1,200–1,400: 17 cities (2%). Below this entry. 1,400–1,600: 15 cities (2%). Below this entry. 2K+: 135 cities (17%). This entry sits in this band. This city 0 2K+ California cities (providers), bucketed by value

Each bar is a band; taller bars hold more cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS National Plan & Provider Enumeration System (NPPES) · 2026

Specialty mix in Fountain Valley

Share of the city's NPPES registrations by NUCC taxonomy

providers

What this shows Behavior Technician is the largest specialty (205 providers, 9.3% of the city), followed by Pharmacist.

Source CMS NPPES · city_top_specialties As of 2026

City vs state specialty index

Specialties Fountain Valley has more, and fewer, of than California average

Each multiple is this city's share of a specialty divided by that specialty's average share across California , Fountain Valley over-indexes other technician at 14.6× the state average and under-indexes student in an organized health care education/training program at 0.35×. This reflects local practice structure, not care quality.

More common here than California average

Less common here than California average

How to read this directory & data limitations

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. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2023 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 (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.

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.

Which specialties are most common in Fountain Valley

# Specialty Providers% of city
1 Behavior Technician 205 9.3%
2 Pharmacist 142 6.5%
3 Marriage & Family Therapist 103 4.7%
4 Internal Medicine Physician 95 4.3%
5 Other Technician 74 3.4%
6 Physician Assistant 65 3.0%
7 Clinical Social Worker 60 2.7%
8 Mental Health Counselor 55 2.5%
9 Physical Therapist 53 2.4%
10 Chiropractor 52 2.4%
11 Family Medicine Physician 46 2.1%
12 Anesthesiology Physician 45 2.1%
13 Family Nurse Practitioner 43 2.0%
14 Pediatrics Physician 43 2.0%
15 Specialist 43 2.0%

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.
Related guides

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.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-20.