Doctors and health care providers in Orange, CA
13,245 individual NPPES records list a practice address in Orange, 11th of 812 California cities. The largest group is behavior technician: 4,271, 32% of the city's records, against 18% across California. Page 60 of 265.
The 8 largest groups in Orange
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
Orange in California
- Rank in California11th of 812 cities by records
- Share of the state1.4% of California's records
- Specialties present25 or more taxonomy codes
- Top three groups42% of all records
- Behavior Technician rank7th of the 10 California cities with the most
Compared with California as a whole, Orange has 7.3× the state's share of other technician records and 0.43× its share of physical therapist records.
Providers in Orange, alphabetically
- Arvonda DiazOccupational Therapist1114308145
- Athziri DiazBehavior Technician1851124473
- Brenda Diaz, RNRegistered Nurse1972672913
- Brenda Diaz, R.N.Registered Nurse1235313651
- Cindy DiazBehavior Analyst1629536701
- Diana Diaz, M.D.Anesthesiology Physician1932424793
- Elianna DiazBehavior Technician1629763339
- Elizabeth DiazSocial Worker1184024945
- Esmeralda DiazBehavior Technician1477414472
- Jennifer DiazBehavior Technician1588385421
- Jonathan DiazBehavior Technician1689458432
- Karen Diaz, LCSWClinical Social Worker1962866103
- Laura DiazBehavior Technician1902582901
- Montserrat DiazBehavior Technician1437024361
- Nancy DiazRehabilitation Practitioner1407253024
- Robert DiazRehabilitation Practitioner1154412716
- Sergio DiazBehavior Technician1700732450
- Stephanie DiazBehavior Technician1306624846
- Wendy Diaz, RN, CDCESDiabetes Educator Registered Nurse1346592532
- Diane Diaz CruzDay Training/Habilitation Specialist1225694375
- Elizabeth Diaz CruzBehavior Technician1447954292
- Karla Diaz De LeonBehavior Technician1730035395
- Julian Diaz DiazBehavior Technician1184499089
- Litzy Diaz LlamasBehavior Technician1407720451
- Brisa Diaz PerezBehavior Technician1063369445
- Gladys Diaz-GarciaAudiologist1619320330
- Rosario Diaz-ResendizBehavior Technician1194574350
- Alejandra Dicaro, PAMedical Physician Assistant1528360724
- Malcolm Dick, PHDNeurology Physician1235182205
- Cordula Dick-Muehlke, PHDClinical Psychologist1306282603
- Jerilyn DickensBehavior Technician1528822061
- Lesley DickersonPsychiatric/Mental Health Registered Nurse1841872876
- Rashell DickersonBehavior Technician1205788205
- Jonathan Dickey, DPTPhysical Therapist1700328127
- Maeve Diehm, MSWClinical Social Worker1073902482
- Brian Diep, MDStudent in an Organized Health Care Education/Training Program1003754813
- Raymond Diep, MDStudent in an Organized Health Care Education/Training Program1285436568
- Tomomi DietmeierBehavior Technician1114881455
- Sabrina DiezBehavior Technician1609763754
- Edenmarie DigerlandoBehavior Technician1245194133
- Christelle DiggisCommunity Health Worker1255151650
- Michael Digiovanni, PASurgical Physician Assistant1477579704
- Ryan Digiovanni, MDAdult Reconstructive Orthopaedic Surgery Physician1720440951
- Kyle Digrande, MDHospitalist Physician1962964635
- Edvin Dilanchiyan, MDHospitalist Physician1245483700
- Fraxine DillagueBehavior Technician1013865088
- Erika DillardBehavior Technician1174223374
- Maureen Dillon, LCSWClinical Social Worker1922359074
- Presli DillonBehavior Technician1275361602
- Madelaine Janet DimalPediatrics Physician1679077390
The largest California cities
- Los Angeles69,537
- San Diego52,937
- San Francisco38,143
- Sacramento33,083
- San Jose20,925
How to read this directory
Orange, California appears in the CMS National Plan and Provider Enumeration System with 13,245 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 Orange - 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 Orange 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 Orange is weighted toward Behavior Technician (4,271 clinicians, followed by Student in an Organized Health Care Education/Training Program with 870 and Marriage & Family Therapist with 424). 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, Orange reports roughly 34 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, Case Manager/Care Coordinator is the most prominent one with no provider currently listing a Orange practice address, a coverage gap Orange patients typically fill by traveling to a larger nearby hub.
For Orange 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 Orange, CA?
There are 13,245 registered healthcare providers in Orange, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.
What are the most common medical specialties in Orange?
The most common specialties in Orange are Behavior Technician, Student in an Organized Health Care Education/Training Program, Marriage & Family Therapist, Clinical Social Worker, Mental Health Counselor. Behavior Technician has the most providers with 4,271.
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.