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 175 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
- Margaret Norton, MS, OTR/LOccupational Therapist1801559810
- Nina NosavanStudent in an Organized Health Care Education/Training Program1437537966
- Madeline Nottoli, MDStudent in an Organized Health Care Education/Training Program1851145205
- Sahar Nourani, RNRegistered Nurse1508426099
- Mahra Nourbakhsh, MDAnatomic Pathology Physician1407407901
- Mahzadeh Nourizadeh, NPNurse Practitioner1508999301
- Ricardo Novelo-RamirezBehavior Technician1407581366
- Heather NowellBehavior Technician1154218204
- Marissa Noyer, BCBABehavior Analyst1427577691
- Jennifer NoyolaOther Technician1962171421
- Selina Noyola PinaBehavior Technician1821772658
- Maryann Nuesse, D.O.Adult Medicine Physician1689633455
- William Nuesse, M.D.Adult Medicine Physician1952360729
- Diane Nugent, M.D.Pediatric Hematology & Oncology Physician1770528663
- James NugentMarriage & Family Therapist1891335675
- Christina Numamoto, LMFTMarriage & Family Therapist1326381344
- Dezirae NunezBehavior Technician1831042860
- Irene Nunez, LCSWClinical Social Worker1376036103
- Jaqueline NunezSocial Worker1982321576
- Jazmine NunezAssistant Behavior Analyst1558050864
- Magdalena NunezCounselor1689432577
- Molly E Nunez, NPNurse Practitioner1851473037
- Silvia NunezCase Manager/Care Coordinator1588258552
- Yamil Nunez AbbudBehavior Technician1235013012
- Andres Nunez PasaranBehavior Technician1114624160
- Cindy Nunez-FloresClinical Social Worker1295177582
- Jolie NunoDrama Therapist1841117942
- Kenneth Nwaezeapu, CRNACertified Registered Nurse Anesthetist1710468574
- Elijah NyaggahBehavior Technician1720790108
- David NykinStudent in an Organized Health Care Education/Training Program1356873293
- Melanie NylandBehavior Technician1982456943
- Thaddeus O'Barr, M.D.Anesthesiology Physician1609168814
- Brandon O'Brien, R.R.T.Home Modifications Contractor1407192057
- Brianna O'BrienPsychiatric/Mental Health Registered Nurse1881532521
- Connor O'Brien, MDStudent in an Organized Health Care Education/Training Program1457055964
- Gianmarco O'Brien, D.D.S.Prosthodontics1336338847
- Susan O'Brien, M.D.Medical Oncology Physician1669577276
- Cameron O'Connell, DOPediatrics Physician1578253571
- Patricia O'ConnellNursing Home Administrator1386216117
- Ryan O'Connell, M.D.Anatomic Pathology & Clinical Pathology Physician1609288794
- Haylie O'ConnorBehavior Technician1881348456
- Sarah O'DellStudent in an Organized Health Care Education/Training Program1801737887
- Christina O'HaraLicensed Psychiatric Technician1881136208
- Mitchell O'LearyStudent in an Organized Health Care Education/Training Program1942905864
- Allison O'Meara, PNPPediatric Nurse Practitioner1508457730
- Holly O'MearaAddiction (Substance Use Disorder) Counselor1659000701
- Frances O'Neil- HoppeRegistered Dietitian1548413750
- Jacqueline O'Neill, MDHospitalist Physician1588153886
- Michael O'Reilly, PA-CPhysician Assistant1669139879
- Christina O'Sullivan, JD, PHDForensic Psychologist1831486000
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.