Doctors and health care providers in Los Angeles, CA
69,537 individual NPPES records list a practice address in Los Angeles, 1st of 812 California cities. The largest group is students in training: 6,770, 10% of the city's records, against 4% across California. Page 188 of 1,391.
The 8 largest groups in Los Angeles
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
Los Angeles in California
- Rank in California1st of 812 cities by records
- Share of the state7.2% of California's records
- Specialties present25 or more taxonomy codes
- Top three groups23.8% of all records
- Students in training rank1st of the 10 California cities with the most
Compared with California as a whole, Los Angeles has 2.3× the state's share of student in an organized health care education/training program records and 0.40× its share of behavior technician records.
Providers in Los Angeles, alphabetically
- Aileen Castillo, NPFamily Nurse Practitioner1265659056
- Alejandra CastilloCase Manager/Care Coordinator1992170534
- Alexis CastilloClinical Social Worker1467906214
- Alexis CastilloBehavior Technician1194417618
- Alondra CastilloBehavior Technician1992445670
- Angela CastilloAddiction (Substance Use Disorder) Counselor1306602487
- Angela CastilloAssistant Behavior Analyst1750235248
- Annadi CastilloMental Health Counselor1407308315
- Arely CastilloRehabilitation Practitioner1689186751
- Ariana CastilloCase Manager/Care Coordinator1154819175
- Arturo Castillo, PACPhysician Assistant1073820528
- Carina Castillo, LMFTMarriage & Family Therapist1972034551
- Carlos CastilloCase Manager/Care Coordinator1811829922
- Casandra CastilloBehavior Technician1720669187
- Caylie CastilloClinical Social Worker1598503724
- Cecilia CastilloBehavior Technician1588481964
- Christine Castillo, MSW INTERNRehabilitation Practitioner1629378989
- Cynthia Castillo, LVNLicensed Vocational Nurse1053654160
- Dulce CastilloBehavior Technician1740033919
- Elizabeth Castillo, PHNCase Management Registered Nurse1578840906
- Emeli CastilloStudent in an Organized Health Care Education/Training Program1699321059
- Emerson CastilloCounselor1326663949
- Emily CastilloRehabilitation Practitioner1508649146
- Enrico Castillo, M.D., M.S.H.P.M.Psychiatry Physician1710204029
- Erick Castillo, M.D., M.P.HStudent in an Organized Health Care Education/Training Program1891237467
- Erwin CastilloBehavior Technician1639873458
- Evelyn CastilloCase Manager/Care Coordinator1982963963
- Flor CastilloBehavior Technician1285464776
- Gabriel CastilloCommunity Health Worker1184452237
- Guadalupe CastilloStudent in an Organized Health Care Education/Training Program1104705912
- Hector Castillo, M.D.Specialist1659366136
- Helena Castillo, PPSCClinical Social Worker1750568671
- Isaac CastilloStudent in an Organized Health Care Education/Training Program1851990543
- Isabel CastilloStudent in an Organized Health Care Education/Training Program1922949007
- Jackelin CastilloRehabilitation Practitioner1235762824
- Jed Castillo, M.D.Surgery Physician1801275920
- Jennifer CastilloAmbulatory Care Registered Nurse1831619584
- Jessica CastilloCase Manager/Care Coordinator1265064158
- Jessica CastilloDay Training/Habilitation Specialist1588547012
- Jocelyn CastilloRehabilitation Practitioner1902478134
- Joel CastilloDay Training/Habilitation Specialist1851133979
- Jonah CastilloBehavior Technician1659119238
- Jonathan Castillo, MSSASocial Worker1215170592
- Katherine CastilloClinical Social Worker1730792060
- Kaya CastilloBehavior Technician1972200905
- Kaylyn CastilloCase Manager/Care Coordinator1255006656
- Kelly CastilloBehavior Technician1891451340
- Kelvin CastilloBehavior Technician1598634255
- Kiersten CastilloBehavior Technician1477437226
- Ligaya CastilloNurse Practitioner1003940503
The largest California cities
- San Diego52,937
- San Francisco38,143
- Sacramento33,083
- San Jose20,925
- Fresno19,440
How to read this directory
Los Angeles, California appears in the CMS National Plan and Provider Enumeration System with 69,537 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 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 2024 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 (6,770 clinicians, followed by Behavior Technician with 4,965 and Clinical Social Worker with 4,806). 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 178.5 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, 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. 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 Los Angeles, CA?
There are 69,537 registered healthcare providers in Los Angeles, CA, covering 25 or more 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, Clinical Social Worker, Marriage & Family Therapist, Case Manager/Care Coordinator. Student in an Organized Health Care Education/Training Program has the most providers with 6,770.
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.