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 176 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
- Gina O'Toole, RD, MPHPediatric Critical Care Nutrition Registered Dietitian1306788161
- Mina Oak, PHDClinical Neuropsychologist1114051919
- Nikki OatesBehavior Technician1821935040
- Edward ObandoBehavior Technician1932810983
- Beziat ObinmaMental Health Counselor1063906022
- Sarah ObornyBehavior Technician1144095035
- Katherine ObregonBehavior Technician1114658440
- Alejandra Ocampo, AU.D.Audiologist1225812241
- Angel OcampoBehavior Technician1700736857
- Claudia Ocampo, REGISTERED DIETITIANRegistered Dietitian1720835275
- Geraldinne OcampoBehavior Technician1417740218
- Liliana OcampoBehavior Technician1467150672
- Samira OcampoMental Health Counselor1689395881
- Carolina Ocampo Martinez, LCSWClinical Social Worker1346575347
- Leslie OceguedaBehavior Technician1841122934
- Belen Oceguera, MAAddiction (Substance Use Disorder) Counselor1518414051
- Cynthia Ocelott, LCSWClinical Social Worker1093231771
- Michele Ocen, PH.D., BCBAClinical Child & Adolescent Psychologist1114329984
- Alejandra OchoaMarriage & Family Therapist1598638470
- Ava OchoaBehavior Technician1528877990
- Carlos OchoaBehavior Technician1902365489
- Erik OchoaBehavior Technician1811864812
- Jackie OchoaDental Assistant1407093800
- Judy OchoaBehavior Analyst1659830008
- Jaden Ochs, APRN, CNM, WHNP-BCMidwife1801763172
- Deena OdehStudent in an Organized Health Care Education/Training Program1689200644
- Isabella OdermattBehavior Technician1790539690
- Britton OdleNeuroradiology Physician1417450271
- Audrey OeiPediatrics Physician1245816040
- Venessa OficialBehavior Analyst1437618899
- Matthew OftelieBehavior Technician1255126249
- Steven Ogaz, DDSDentist1003034943
- Danielle Ogez, M.D.Obstetrics & Gynecology Physician1407201049
- Vivian Ogueli, M.D.Pediatrics Physician1881056349
- Jacob OhBehavior Technician1538972997
- Lori Oh, PHARMDPharmacist1174067557
- Michael Oh, MDNeurological Surgery Physician1275508525
- Saerom OhAcupuncturist1942690169
- Wesley OhDiagnostic Radiology Physician1538521018
- Ana OhiMental Health Counselor1043705189
- Anuj Ohri, M.D.Hospitalist Physician1801238407
- Kusum Ohri, M.D.Internal Medicine Physician1477692333
- Natasha OhtaPhysician Assistant1720415391
- Nicholas OifohPhysical Therapist1104399385
- Claudia OjedaMarriage & Family Therapist1568864064
- Daniel OjedaBehavior Technician1629537105
- Katia OjendizClinical Social Worker1376296046
- Phillip Oka Jr, PMHNP-BCPsychiatric/Mental Health Nurse Practitioner1114813029
- Anna Okabe, MDStudent in an Organized Health Care Education/Training Program1538017769
- Norichika Okada, MDAnesthesiology Physician1568421832
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.