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 189 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
- Liliana CastilloClinical Social Worker1639402605
- Lily Castillo, RBTBehavior Technician1346049392
- Luz Castillo, CPHW, MACommunity Health Worker1588801914
- Malaysha Castillo, MFT INTERNMental Health Counselor1205170032
- Maria Castillo, N.P.Obstetrics & Gynecology Nurse Practitioner1003051954
- Maria CastilloCase Manager/Care Coordinator1568894665
- Marlita CastilloFamily Nurse Practitioner1700549185
- Marta Castillo, M.A.Marriage & Family Therapist1073871877
- Matthew CastilloSocial Worker1639863046
- Melissa CastilloDay Training/Habilitation Specialist1841830668
- Monserrath CastilloStudent in an Organized Health Care Education/Training Program1699409375
- Nestor Castillo, CRT,RRTCritical Care Registered Respiratory Therapist1932623600
- Olivia Castillo, DPTPhysical Therapist1013365543
- Otilio Castillo, MDStudent in an Organized Health Care Education/Training Program1801646401
- Patricia Castillo, M.D.Pediatrics Physician1093014557
- Phil Castillo, M.D.Anesthesiology Physician1003068834
- Rae Ann CastilloAcute Care Nurse Practitioner1417365784
- Rhina Castillo, M.D.Pediatrics Physician1962723916
- Robert Castillo, B.AAddiction (Substance Use Disorder) Counselor1346476587
- Robert CastilloRehabilitation Practitioner1053728493
- Roberto CastilloBehavior Technician1295666022
- Romyliza Castillo, COTA/LMental Health Occupational Therapist1558901645
- Ronald CastilloStudent in an Organized Health Care Education/Training Program1689427569
- Rosemary CastilloCommunity Health Worker1013716422
- Salvador CastilloBehavior Technician1841902772
- Samuel CastilloMental Health Counselor1588908180
- Sanjuana Castillo, M.D.Student in an Organized Health Care Education/Training Program1285991562
- Sergio Castillo, PH.D.Clinical Psychologist1174602866
- Sheila CastilloClinical Social Worker1871033415
- Stephanie CastilloCase Manager/Care Coordinator1841561057
- Stephanie CastilloMarriage & Family Therapist1255713921
- Teresa CastilloRegistered Nurse1831843366
- Vanessa Castillo, LCSWClinical Social Worker1518415876
- Vanessa Castillo, MDHospitalist Physician1407483605
- Victoria CastilloStudent in an Organized Health Care Education/Training Program1386475192
- Kathy Castillo EscutiaStudent in an Organized Health Care Education/Training Program1356227763
- Marie Castillo LealClinical Social Worker1457767287
- Jennifer Castillo LopezHealth & Wellness Coach1598623662
- Jessika Castillo Padilla, PSYDPsychologist1447709001
- Diana Castillo PenaDay Training/Habilitation Specialist1225836687
- Maryjanne Castillo RomeroBehavior Technician1376401083
- Yvonne Castillo UrbinaMental Health Counselor1396278677
- Ana Castillo-Garcia, B.A.Health & Wellness Coach1598855280
- Espy CastillonCase Manager/Care Coordinator1902540842
- Deborah Castine, MDAnesthesiology Physician1083727267
- Vanessa Castine, MDObstetrics & Gynecology Physician1821493289
- Dominique CastleMarriage & Family Therapist1033082300
- Linda Castle, MSWClinical Social Worker1124265095
- Michael CastleAddiction (Substance Use Disorder) Counselor1932028826
- Steven Castle, MDGeriatric Medicine (Internal Medicine) Physician1619069325
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.