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 122 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
- Luis Kobashi, M.D.Urology Physician1710963095
- Mark R Kobayashi, MDPlastic Surgery Physician1518047729
- Patrycia KochmanskiBehavior Technician1740749266
- Alexis Koda, MDEmergency Medicine Physician1699157651
- Gopal KodumudiAnesthesiology Physician1285195982
- Kevin Koenig, MDStudent in an Organized Health Care Education/Training Program1801240965
- Kristi L Koenig, MDEmergency Medicine Physician1245310457
- Kyler KoepkeBehavior Technician1356142798
- Robin Koeppel, DNP, CNSNeonatal-Perinatal Medicine Physician1689463879
- Fred Kogen, M.D.General Practice Physician1740521608
- Duane KohStudent in an Organized Health Care Education/Training Program1760897300
- Lindsay KohanStudent in an Organized Health Care Education/Training Program1356145833
- Elspeth KohlerOccupational Therapist1407353501
- Lisa Kohorn, M.D.Anatomic Pathology & Clinical Pathology Physician1720097066
- Bedros Kojian, MDObstetrics & Gynecology Physician1467498188
- Anjani Kolahi, MDHospitalist Physician1306103791
- Anish KolanStudent in an Organized Health Care Education/Training Program1013619444
- Douglas KolbergMental Health Counselor1730528928
- John Kole, DCChiropractor1699807990
- Apostolos Kolitsas, MDStudent in an Organized Health Care Education/Training Program1659068427
- Fathima Kolonda Kilpatrick, M.D.Anesthesiology Physician1174848626
- Brian Kolski, MDInterventional Cardiology Physician1851449896
- Mariska KoltaiBehavior Technician1275411209
- Esther Komanapalli, MDAnesthesiology Physician1164665204
- Margaret KomrijPhysical Therapy Assistant1649669292
- Julie Komulaine, SLP-CFSpeech-Language Pathologist1770068785
- Leilani KonatsuBehavior Technician1083574446
- Allen Kong, MDTrauma Surgery Physician1083893564
- Xiaotang Kong, MDNeurology Physician1861639114
- Lyda KongswangwongsaSpeech-Language Pathologist1891183422
- Piyanuch Kongtim, MD, PHD.Hematology & Oncology Physician1720696438
- Carlos Konishi, PH.D.Psychologist1851541684
- Ariel KonnekerNutritionist1962902239
- Anvita KonreddyStudent in an Organized Health Care Education/Training Program1336087733
- Kurtis KonstanzerBehavior Technician1275286817
- Krystle KontoesAddiction (Substance Use Disorder) Counselor1659947596
- Haimin KooBehavior Technician1619772035
- Na Eun KooOther Technician1467058776
- Rachel KooBehavior Technician1831804343
- Sarah KooStudent in an Organized Health Care Education/Training Program1982542783
- Sonya Koo, MDNuclear Radiology Physician1386983138
- Christina Kopatz, MDSurgery Physician1396204285
- James Korb, MDPediatrics Physician1194735076
- Camille Korbut, HIGH SCHOOL DIPLOMABehavior Technician1790244184
- Michael Korczynski, DODiagnostic Radiology Physician1962963801
- Joseph Koressel, MDAdult Reconstructive Orthopaedic Surgery Physician1083118616
- Michael KornbluthMarriage & Family Therapist1023363074
- Elliott Kornhauser, MDOccupational Medicine Physician1508946716
- Alicia Kort, M.S. EDAthletic Trainer1437292075
- Amy Kosanke, CRNACertified Registered Nurse Anesthetist1215993985
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.