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 173 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
- Trung Nguyen, DDSDentist1831318054
- Truongson Nguyen, M.D.Hospitalist Physician1922232206
- Truyen Nguyen, PHARMDPharmacist1417597055
- Tryston Nguyen, PSY.D.Clinical Psychologist1386889228
- Tuan Nguyen, PHARMDPharmacist1518367580
- Tuan NguyenBehavior Technician1942160866
- Tuong NguyenBehavior Technician1548157696
- Van NguyenAssistant Behavior Analyst1871051490
- Van NguyenOther Technician1811593379
- VI NguyenBehavior Technician1891651261
- Victoria Nguyen, DOPhysical Medicine & Rehabilitation Physician1790364297
- Viet Nguyen, BCBABehavior Analyst1043761430
- Viet Scott Nguyen, DOAnesthesiology Physician1437737186
- Vincent NguyenBehavior Technician1487483202
- Vivian NguyenBehavior Technician1396564266
- William Nguyen, M.D.Internal Medicine Physician1043424575
- Christine Nguyen Dawson, MDObstetrics & Gynecology Physician1407458029
- Van Nguyen Greco, M.D.Child Abuse Pediatrics Physician1679895544
- Ann Nguyen Pham, MDObstetrics & Gynecology Physician1578190542
- Steven Nguyen-Ho, PA-CPhysician Assistant1821952623
- Alyssa Nguyen-Phuoc, M.D.Emergency Medicine Physician1558756734
- Hanh-Uyen Nguyen-Tang, M.D.Pediatrics Physician1851588156
- Relinthis Ngwafa, NPFamily Nurse Practitioner1134974132
- Karen Ni, OTD, OTR/LOccupational Therapist1376944843
- Courtney Nicholas, M.D.Pediatrics Physician1902059934
- Ivan Nichols, M.D.Family Medicine Physician1609965417
- Lori Nichols, RRTGeneral Care Registered Respiratory Therapist1053200345
- Shannon Nichols, LCSWClinical Social Worker1013650779
- Shawn Nichols, AGACNP-BCNurse Practitioner1396416533
- Roman Nichols-DunlapBehavior Technician1073497889
- Arieauna NicholsonBehavior Technician1164283867
- Chad Nicholson, PTOrthopedic Physical Therapist1013127133
- Monique NicholsonHearing Instrument Specialist1518430198
- Jasmine NickelberryBehavior Technician1073497483
- Bruce Nickerson, MDPediatric Pulmonology Physician1215026521
- Kyley NicklasBehavior Analyst1134698954
- Katelyn NicolBehavior Technician1821970286
- Nina Nicolas, NPNurse Practitioner1073846754
- Jennifer Nicolas PadillaBehavior Technician1164280665
- Carli NielsenBehavior Technician1205695558
- Hannah NielsenBehavior Technician1861063026
- Julie Nielsen, DDSDentist1861648073
- Elliot Nielson, MDFamily Medicine Physician1023711389
- Nancy Niemiec, HISHearing Instrument Specialist1972274835
- Brittani NietoRegistered Nurse1194439984
- Jersson NietoSocial Worker1396520110
- Michael Nieto, M.D.Pediatric Sports Medicine Physician1861848947
- Roberta Nieto, MDFamily Medicine Physician1306847116
- Delma Nieves, M.D.Pediatrics Physician1083894315
- Lizette Nieves, FNPFamily Nurse Practitioner1346096690
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.