2026 data CMS NPPES NUCC Taxonomy

Doctors in Orange, CA

Compiled from official public sources by the PlainDoctor editorial team.

Active healthcare providers in Orange sourced from the CMS NPPES weekly file, no proprietary ratings, no editorial scores. NPI counts, specialty distribution, and primary practice addresses refreshed each release.

12,496
Providers
CMS NPPES-registered
20
Specialties
NUCC taxonomy codes
Behavior Technician
Top specialty
3,970 providers
California
State
CA

12,496 healthcare providers across 20 specialties

Orange, California appears in the CMS National Plan and Provider Enumeration System with 12,496 registered healthcare providers spanning 20 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 2023 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 (3,970 clinicians, followed by Student in an Organized Health Care Education/Training Program with 935 and Marriage & Family Therapist with 390). 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 32.1 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.

Within California, Orange ranks #11 of 805 cities tracked by provider count, accounting for 1.3% of the state's registered providers. 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, searching by specialty narrows the 690-taxonomy roster to clinicians with the relevant training, and each provider page links to NPI, state licensing boards, and the NPPES registry for credential verification. 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, so listing details may be out of date; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients. Nothing on this page substitutes for consulting a licensed clinician about your personal health decisions.

12,496
Providers
20
Specialties
#11
of 805 CA cities
1.3%
of CA providers
32.1
Per 100K (state)

Which specialties are most common in Orange

Behavior Technician 3,970
Student in an Organized Health Care Education/Training Program 935
Marriage & Family Therapist 390
Mental Health Counselor 304
Clinical Social Worker 278
Other Technician 261
Internal Medicine Physician 243
Pediatrics Physician 236
Anesthesiology Physician 235
Pharmacist 225
Addiction (Substance Use Disorder) Counselor 190
Physician Assistant 172
Registered Nurse 171
Behavior Analyst 168
Dentist 158
Emergency Medicine Physician 150
Physical Therapist 133
Family Nurse Practitioner 129
Speech-Language Pathologist 128
Diagnostic Radiology Physician 125

Healthcare Providers (Page 168)

Name
Dominic Ong
Marriage & Family Therapist
Joshua Ong
Nurse Practitioner
Tiong S Ong, MD
Hematology & Oncology Physician
Jaelynn Ono
Behavior Technician
Jon Onosaki, PA-C
Physician Assistant
Eric Ontiveros, M.D.
Anesthesiology Physician
Lourdes Ontiveros
Addiction (Substance Use Disorder) Counselor
Doris Onuohah, NP
Psychiatric/Mental Health Nurse Practitioner
Catherine Onwordi
Licensed Vocational Nurse
Kurt Openshaw, M.D.
Vascular & Interventional Radiology Physician
Ronaldo Opinga, D.M.D.
General Practice Dentistry
Victoria Oppenheim, MD
Emergency Medicine Physician
Aries Orange
Marriage & Family Therapist
Brenda Ordaz
Case Manager/Care Coordinator
Siboney Ordaz, MSW
Social Worker
Maria Jose Ordenana, RN FNP
Family Nurse Practitioner
Theadora Ordog
Student in an Organized Health Care Education/Training Program
Michael Ordon, M.D.
Urology Physician
Narin Ordoubadi
Behavior Technician
Carlos Orduno
Behavior Technician
Aurora Oregel
Clinical Social Worker
Kyle Oreilly
Critical Care Medicine Registered Nurse
Catherine Orejel
Behavior Technician
Samantha Orel, NP
Pediatric Nurse Practitioner
Gilbert Orellana
Pharmacy Technician
Julia Orendain
Other Technician
Miguel Orendain Moreno, BCBA
Behavior Analyst
Madison Ormsbee
Behavior Technician
Carlos Ornelas
Other Technician
Valarie Orona
Day Training/Habilitation Specialist
Cristal Oropeza
Behavior Technician
Vanessa Oropeza
Community Health Worker
Emmeline Oros, PA
Physician Assistant
Lorraine Orosco
Behavior Technician
Emma Orozco, SONOGRAPHY CERT
Sonography Radiologic Technologist
Jonathan Orozco
Behavior Analyst
Martin Orozco
Mental Health Counselor
Misti Orozco
Mental Health Counselor
Monica Orozco
Behavior Technician
Pedro Orozco, M.D.
Anesthesiology Physician
Melany Orozco Guzman
Behavior Technician
Michelangelo Orsi
Licensed Psychiatric Technician
Aaron Ortega
Behavior Technician
Ana Ortega
Behavior Technician
Ashly Ortega
Behavior Technician
Ava Ortega
Behavior Technician
Jocelyn Ortega
Behavior Technician
Laisha Ortega
Behavior Technician
Maritza Ortega
Behavior Technician
Montserrat Ortega
Behavior Technician

Nearby Cities in California

Other California cities with provider coverage in the CMS NPPES registry.

Compare specialties side-by-side →

Frequently Asked Questions

How many doctors are in Orange, CA?
There are 12,496 registered healthcare providers in Orange, CA, covering 20 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, Mental Health Counselor, Clinical Social Worker. Behavior Technician has the most providers with 3,970.

Provider data from CMS NPPES (download.cms.gov/nppes); specialty classification from NUCC Health Care Provider Taxonomy. PlainDoctor does not rate or rank providers. Methodology · About

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from CMS National Plan and Provider Enumeration System (NPPES). Consult a qualified professional before making decisions based on this data.

Compiled from official public sources by the PlainDoctor editorial team.