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 64 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
- Lianjie Du, M.D.Psychiatry Physician1255331385
- Na Du, PSY.D.Clinical Psychologist1760229736
- Anoushka Dua, MDGastroenterology Physician1740817576
- Andrea DuarteBehavior Technician1013781046
- Angelique DuarteBehavior Technician1396573457
- Carena DuarteBehavior Technician1477246098
- Evan DuarteCommunity Health Worker1700676665
- Francisco DuarteBehavior Technician1386531622
- Julio Duarte, MDAnesthesiology Physician1780862375
- Kaylee DuarteBehavior Technician1700428752
- Paul DuarteBehavior Technician1962106781
- Georgia DubowBehavior Technician1730848243
- Kevin DuenasBehavior Technician1801582515
- Steven DuffBehavior Technician1366110728
- Patrick DuffeyCase Manager/Care Coordinator1891062485
- Michael Dugan, M.D.Anatomic Pathology & Clinical Pathology Physician1649492745
- Erica Duh, MDInternal Medicine Physician1295239382
- Destiny DuhonBehavior Technician1922564129
- Dana DukicBehavior Technician1396303475
- Sarah Dull, AGACNP-BCNurse Practitioner1851048664
- Leonila DullaLicensed Psychiatric Technician1750088704
- Alyssa DumaineBehavior Technician1063070084
- Timothy DunaganAnesthesiology Physician1710628045
- Stefan DunauskasAdult Health Nurse Practitioner1891151148
- Susan Duncan, R.N.Ambulatory Care Registered Nurse1811227069
- Thunhi DuncanPharmacist1336676188
- Joanna Duncan SilvaBehavior Technician1144098765
- Kristin DuneBehavior Technician1891411724
- Robert Dunn, M.D.Specialist1861541732
- Valerie Dunn, LMFTMarriage & Family Therapist1417394974
- Cole DunnihooBehavior Technician1154279818
- Toni Dunning, MA, DMFT, LMFTMarriage & Family Therapist1336414812
- Molly DunnionBehavior Technician1699422147
- Alexander Duong, MDStudent in an Organized Health Care Education/Training Program1831891043
- Carolyn Duong, ODOptometrist1073878096
- Cathy Duong, LCGCGenetic Counselor (M.S.)1518786946
- Christina Duong, N.P.Primary Care Nurse Practitioner1770830499
- Dang Khoa T Duong, MDHospitalist Physician1346320488
- Gina Duong, BCBABehavior Analyst1144730110
- Heidi Duong, PHARM DPharmacist1073994802
- Hieu DuongBehavior Analyst1063380210
- Kevin Duong, DPTPhysical Therapist1558865519
- Kylaa DuongRehabilitation Practitioner1235534678
- Long Duong, MDStudent in an Organized Health Care Education/Training Program1538588843
- Mia DuongBehavior Technician1467175703
- Nga DuongMarriage & Family Therapist1558495143
- Suphattra DuongMassage Therapist1811347719
- Patty Dupont-Tyler, PNPPediatric Nurse Practitioner1871627422
- Emily DupuisBehavior Technician1639066103
- Joseph Duquesnel, M.F.T.Marriage & Family Therapist1033402987
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.