Internal Medicine in Orange, CA

586 active Internal Medicine providers practice in Orange, California according to the latest NPPES snapshot. Profiles include the NPI number, taxonomy code, license state, and practice address.

Internal Medicine providers in Orange, CA
NPI	Name	Type	Specialty	Location
1578668067	Acharya and Sharma Medical Corp.	Organization	Internal Medicine Physician	Orange, CA
1336106871	Adithya Cattamanchi	Individual	Critical Care Medicine (Internal Medicine) Physician	Orange, CA
1235124108	Alaa Abousaif	Individual	Gastroenterology Physician	Orange, CA
1649288002	Alex Zand	Individual	Internal Medicine Physician	Orange, CA
1922299023	Alex Zand, MD A Professional Corporation	Organization	Internal Medicine Physician	Orange, CA
1295927390	Alexander Jahng	Individual	Gastroenterology Physician	Orange, CA
1740365550	Alexander Minella	Individual	Hematology & Oncology Physician	Orange, CA
1760475701	Amer Jabara	Individual	Nephrology Physician	Orange, CA
1518983899	Amir Ghiassi	Individual	Critical Care Medicine (Internal Medicine) Physician	Orange, CA
1881728426	Andres Deluna	Individual	Cardiovascular Disease Physician	Orange, CA
1023198272	Andrew Reikes	Individual	Endocrinology, Diabetes & Metabolism Physician	Orange, CA
1922216175	Angela Fleischman	Individual	Hematology & Oncology Physician	Orange, CA
1437358173	Angela Tan	Individual	Geriatric Medicine (Internal Medicine) Physician	Orange, CA
1285767475	Anna Jin	Individual	Nephrology Physician	Orange, CA
1205974755	Arash Rezazadeh Kalebasty	Individual	Hematology & Oncology Physician	Orange, CA
1215081807	Arnold Seto	Individual	Interventional Cardiology Physician	Orange, CA
1508050865	Bahman Saatian	Individual	Pulmonary Disease Physician	Orange, CA
1154401313	Bavani Nadeswaran	Individual	Internal Medicine Physician	Orange, CA
1154306678	Behnam Khaleghi	Individual	Rheumatology Physician	Orange, CA
1447321427	Blanca Trevino-Scatterday	Individual	Addiction Medicine (Internal Medicine) Physician	Orange, CA
1164502233	Bogi Andersen	Individual	Endocrinology, Diabetes & Metabolism Physician	Orange, CA
1851449896	Brian Kolski	Individual	Interventional Cardiology Physician	Orange, CA
1609970292	Brian S Andrews	Individual	Rheumatology Physician	Orange, CA
1134202658	Byron J Allen	Individual	Cardiovascular Disease Physician	Orange, CA
1982784047	C Gregory Albers	Individual	Gastroenterology Physician	Orange, CA
1063501468	Carole Sofio	Individual	Internal Medicine Physician	Orange, CA
1649350786	Catherine Diamond	Individual	Infectious Disease Physician	Orange, CA
1770542920	Charles Kaupke	Individual	Nephrology Physician	Orange, CA
1275680829	Chien-Ko Wu	Individual	Internal Medicine Physician	Orange, CA
1083820856	Chien-Ko Wu, M.D. and Meei-Ling T Wu, M.D., Inc.	Organization	Internal Medicine Physician	Orange, CA
1649350307	Chinh Duy Le	Individual	Internal Medicine Physician	Orange, CA
1205999075	Coleen Cunningham	Individual	Infectious Disease Physician	Orange, CA
1912079575	Craig Milhouse	Individual	Internal Medicine Physician	Orange, CA
1588744668	Cyril Barton	Individual	Nephrology Physician	Orange, CA
1710090055	David B. Stanton M.D. & Associates, A Medical Group, Inc.	Organization	Gastroenterology Physician	Orange, CA
1619196755	David Donaldson	Individual	Clinical Cardiac Electrophysiology Physician	Orange, CA
1851497457	David Padilla	Individual	Internal Medicine Physician	Orangevale, CA
1912932740	David Pan	Individual	Cardiovascular Disease Physician	Orange, CA
1821101163	David Stanton	Individual	Gastroenterology Physician	Orange, CA
1205944485	Dawn Lombardo	Individual	Advanced Heart Failure and Transplant Cardiology Physician	Orange, CA
1356541502	Deepa Jeyakumar	Individual	Hematology & Oncology Physician	Orange, CA
1255358727	Deepti Pandita	Individual	Internal Medicine Physician	Orange, CA
1639246580	Desmond Sjauwfoekloy	Individual	Critical Care Medicine (Internal Medicine) Physician	Orange, CA
1881689347	Dicran Baron	Individual	Cardiovascular Disease Physician	Orange, CA
1255335659	Donald Mahon	Individual	Cardiovascular Disease Physician	Orange, CA
1215017363	Donald N Forthal	Individual	Infectious Disease Physician	Orange, CA
1942350491	Dongmei Jiang	Individual	Internal Medicine Physician	Orange, CA
1558392704	Edward Jones-Lopez	Individual	Infectious Disease Physician	Orange, CA
1780764951	Edward L Nelson	Individual	Hematology & Oncology Physician	Orange, CA
1659315752	Edwin Alexander	Individual	Internal Medicine Physician	Orange, CA

Frequently asked questions

How many Internal Medicine providers are in Orange, CA?

The latest NPPES snapshot lists 586 active Internal Medicine providers with a practice address in Orange, California.

How do I check a Internal Medicine provider's NPI in Orange?

Open a profile below to see the NPI number, taxonomy code, and practice address, then verify against the official NPPES registry — every profile links directly to the CMS record.

Source: CMS NPPES (public data). Snapshot 2026-07-10.