2026 data CMS NPPES NUCC Taxonomy

Doctors in Los Angeles, CA

Compiled from official public sources by the PlainDoctor editorial team.

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

67,148
Providers
CMS NPPES-registered
20
Specialties
NUCC taxonomy codes
Student in an Organized Health Care Education/Training Program
Top specialty
7,609 providers
California
State
CA

67,148 healthcare providers across 20 specialties

Los Angeles, California appears in the CMS National Plan and Provider Enumeration System with 67,148 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 Los Angeles - 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 Los Angeles 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 Los Angeles is weighted toward Student in an Organized Health Care Education/Training Program (7,609 clinicians, followed by Behavior Technician with 4,568 and Marriage & Family Therapist with 3,842). 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, Los Angeles reports roughly 172.3 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.

Within California, Los Angeles ranks #1 of 805 cities tracked by provider count, accounting for 7.2% of the state's registered providers. Of California's most common specialties, Behavior Analyst is the most prominent one with no provider currently listing a Los Angeles practice address, a coverage gap Los Angeles patients typically fill by traveling to a larger nearby hub.

For Los Angeles 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.

67,148
Providers
20
Specialties
#1
of 805 CA cities
7.2%
of CA providers
172.3
Per 100K (state)

Which specialties are most common in Los Angeles

Student in an Organized Health Care Education/Training Program 7,609
Behavior Technician 4,568
Marriage & Family Therapist 3,842
Clinical Social Worker 3,544
Case Manager/Care Coordinator 2,925
Mental Health Counselor 2,489
Addiction (Substance Use Disorder) Counselor 2,174
Pharmacist 1,780
Internal Medicine Physician 1,630
Rehabilitation Practitioner 1,534
Physical Therapist 1,165
Acupuncturist 1,160
Community Health Worker 1,140
Social Worker 1,082
Clinical Psychologist 1,041
Family Nurse Practitioner 996
Pediatrics Physician 969
Physician Assistant 886
Dentist 884
General Practice Dentistry 879

Healthcare Providers (Page 181)

Name
Naylli Castillejos
Behavior Technician
Adam Castillo
Clinical Social Worker
Adrian Castillo, M.D.
Cardiovascular Disease Physician
Aileen Castillo, NP
Family Nurse Practitioner
Alejandra Castillo
Case Manager/Care Coordinator
Alexis Castillo
Clinical Social Worker
Alexis Castillo
Behavior Technician
Alondra Castillo
Behavior Technician
Angela Castillo
Addiction (Substance Use Disorder) Counselor
Annadi Castillo
Mental Health Counselor
Arely Castillo
Rehabilitation Practitioner
Ariana Castillo
Case Manager/Care Coordinator
Arturo Castillo, PAC
Physician Assistant
Carina Castillo, LMFT
Mental Health Counselor
Casandra Castillo
Behavior Technician
Caylie Castillo
Student in an Organized Health Care Education/Training Program
Cecilia Castillo
Behavior Technician
Christine Castillo, MSW INTERN
Rehabilitation Practitioner
Cynthia Castillo, LVN
Licensed Vocational Nurse
Dulce Castillo
Behavior Technician
Elizabeth Castillo, PHN
Case Management Registered Nurse
Emeli Castillo
Student in an Organized Health Care Education/Training Program
Emerson Castillo
Addiction (Substance Use Disorder) Counselor
Emily Castillo
Rehabilitation Practitioner
Enrico Castillo, M.D., M.S.H.P.M.
Psychiatry Physician
Erick Castillo, M.D., M.P.H
Student in an Organized Health Care Education/Training Program
Erwin Castillo
Behavior Technician
Evelyn Castillo
Case Manager/Care Coordinator
Flor Castillo
Behavior Technician
Gabriel Castillo
Community Health Worker
Guadalupe Castillo
Student in an Organized Health Care Education/Training Program
Hector Castillo, M.D.
Specialist
Helena Castillo, PPSC
Clinical Social Worker
Isaac Castillo
Student in an Organized Health Care Education/Training Program
Jackelin Castillo
Rehabilitation Practitioner
Jed Castillo, M.D.
Surgery Physician
Jennifer Castillo
Ambulatory Care Registered Nurse
Jessica Castillo
Case Manager/Care Coordinator
Jessica Castillo
Day Training/Habilitation Specialist
Jocelyn Castillo
Behavior Technician
Jonah Castillo
Behavior Technician
Jonathan Castillo, MSSA
Social Worker
Katherine Castillo
Clinical Social Worker
Kaya Castillo
Behavior Technician
Kaylyn Castillo
Case Manager/Care Coordinator
Kelly Castillo
Behavior Technician
Kelvin Castillo
Behavior Technician
Kiersten Castillo
Behavior Technician
Ligaya Castillo
Nurse Practitioner
Liliana Castillo
Rehabilitation Practitioner

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 Los Angeles, CA?
There are 67,148 registered healthcare providers in Los Angeles, CA, covering 20 specialties. This includes physicians, dentists, therapists, and other licensed providers.
What are the most common medical specialties in Los Angeles?
The most common specialties in Los Angeles are Student in an Organized Health Care Education/Training Program, Behavior Technician, Marriage & Family Therapist, Clinical Social Worker, Case Manager/Care Coordinator. Student in an Organized Health Care Education/Training Program has the most providers with 7,609.

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 PlainDoctor editorial team.