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 241 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
- Ngoc TranBehavior Technician1104620038
- Nguyen Tran, MDAerospace Medicine Physician1184149189
- Nhu TranBehavior Technician1932051406
- Nina Tran, PAPhysician Assistant1104559517
- Nyvia TranRehabilitation Practitioner1255850509
- Paulvina TranBehavior Technician1841010964
- Peter TranDiagnostic Radiology Physician1942886304
- Phoi TranPhysician Assistant1538881073
- Phuc-Bao Tran, D.OFamily Medicine Physician1811347198
- Phuong TranPharmacist1194142372
- Robert Tran, MDFamily Medicine Physician1487645016
- Ryan TranPharmacist1578449484
- Son Tran, M.D.Anesthesiology Physician1831110378
- Sophia Tran, PSYDMental Health Counselor1689745135
- Tammy Tran, PNP, MSN, RNPediatric Nurse Practitioner1578922068
- Thach TranBehavior Technician1174462378
- Thanh Tran, M.D.Anesthesiology Physician1265453708
- Thanh Tran, BCBABehavior Analyst1316739139
- Thi Tran, NONEBehavior Technician1639874555
- Thomas Tran, D.D.S.General Practice Dentistry1841373388
- Thu TranLicensed Vocational Nurse1689413346
- Thuc TranBehavior Technician1407748247
- Thuy Tran, M.D.Surgical Oncology Physician1851736938
- Tiffany TranOther Technician1841869872
- Tiffany TranPharmacist1134085525
- Tila TranBehavior Technician1861275661
- Timothy TranBehavior Technician1447931415
- Tran TranBehavior Technician1679290134
- Trang Tran, D.D.S.General Practice Dentistry1699899203
- Trang Tran, BCBABehavior Analyst1972048957
- Tri TranBehavior Technician1568245173
- Trina Tran, PHARMDPharmacist1134544950
- Trina TranBehavior Technician1407730971
- Trudie TranRegistered Nurse1811611395
- Tuong-Vi Tran, MDNeurology with Special Qualifications in Child Neurology Physician1386176907
- Victoria TranMental Health Counselor1871069948
- Viet TranBehavior Technician1689449779
- Vincent TranBehavior Technician1316807761
- Vincent TranBehavior Technician1033067756
- Wendy Tran, DDSPediatric Dentistry1972954535
- Zena TranBehavior Technician1225973555
- Phong Tran CaoDentist1194972364
- Karen Tran-Harding, M.D.Body Imaging Physician1467896563
- Justin TrangBehavior Technician1194609941
- Douglas Trask, MDSleep Medicine (Otolaryngology) Physician1346233467
- Sebastian TravisBehavior Technician1326935677
- Robert Treanor, D.C., L.ACChiropractor1205951191
- Angelina TrejoBehavior Technician1255018206
- Erika Trejo, AMFTMarriage & Family Therapist1396452157
- Kasandra TrejoBehavior Technician1184587198
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.