Internal Medicine in Thousand Oaks, CA

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

Internal Medicine providers in Thousand Oaks, CA
NPI	Name	Type	Specialty	Location
1164041422	Advanced Care Multispecialty Medical Group Apc	Organization	Nephrology Physician	Thousand Oaks, CA
1497970875	Advanced Gastroenterology, Inc.	Organization	Gastroenterology Physician	Thousand Oaks, CA
1871923631	Adventist Health Physicians Network	Organization	Hematology & Oncology Physician	Thousand Oaks, CA
1841666534	Adventist Health Physicians Network	Organization	Hematology & Oncology Physician	Thousand Oaks, CA
1306137476	Aelita Khachatrian	Individual	Rheumatology Physician	Thousand Oaks, CA
1740429588	Afshin Samet MD Prof Corp	Organization	Internal Medicine Physician	Thousand Oaks, CA
1164750170	Ali Farrokh	Individual	Pulmonary Disease Physician	Thousand Oaks, CA
1255860490	Ali Farrokh, MD, Inc	Organization	Pulmonary Disease Physician	Thousand Oaks, CA
1700021805	Amit Monga	Individual	Internal Medicine Physician	Thousand Oaks, CA
1316255748	Amy Chow	Individual	Endocrinology, Diabetes & Metabolism Physician	Thousand Oaks, CA
1205000890	Andre Akhondi	Individual	Cardiovascular Disease Physician	Thousand Oaks, CA
1922027630	Andres Giron	Individual	Pulmonary Disease Physician	Thousand Oaks, CA
1942769104	Andrew Gregg	Individual	Gastroenterology Physician	Thousand Oaks, CA
1528299708	Andrew Ma	Individual	Infectious Disease Physician	Thousand Oaks, CA
1265686299	Anitha Srinivasa, MD, Inc.	Organization	Internal Medicine Physician	Thousand Oaks, CA
1033119946	Anthony Capparelli	Individual	Nephrology Physician	Thousand Oaks, CA
1790703643	Ardeshir Farshidi	Individual	Clinical Cardiac Electrophysiology Physician	Thousand Oaks, CA
1639531403	Arian Gower	Individual	Nephrology Physician	Thousand Oaks, CA
1427314178	Arpna Patel	Individual	Internal Medicine Physician	Thousand Oaks, CA
1881893329	Arvin Tunick	Individual	Internal Medicine Physician	Thousand Oaks, CA
1144290081	Ashraf Nashed	Individual	Cardiovascular Disease Physician	Thousand Oaks, CA
1861495475	Ashwin Kashyap	Individual	Hematology & Oncology Physician	Thousand Oaks, CA
1417145673	Ashwin Kashyap, MD. Inc	Organization	Hematology & Oncology Physician	Thousand Oaks, CA
1477780229	Aviisha Medical Corporation	Organization	Internal Medicine Physician	Thousand Oaks, CA
1295734614	Bahareh Bahadini	Individual	Hematology & Oncology Physician	Thousand Oaks, CA
1528167830	Bassam Ghanem	Individual	Hematology & Oncology Physician	Thousand Oaks, CA
1184085383	Behooli Healthcare Inc.	Organization	Hospice and Palliative Medicine (Internal Medicine) Physician	Thousand Oaks, CA
1831382738	Bernard Klein	Individual	Internal Medicine Physician	Thousand Oaks, CA
1538366489	Bonaventure Eng	Individual	Gastroenterology Physician	Thousand Oaks, CA
1073662060	Bonaventure F Eng MD Inc	Organization	Gastroenterology Physician	Thousand Oaks, CA
1861856361	Brian Yu	Individual	Internal Medicine Physician	Thousand Oaks, CA
1043702699	C. Michael Purmer MD Inc	Organization	Cardiovascular Disease Physician	Thousand Oaks, CA
1952139016	Cal Injury Advocates Inc.	Organization	Internal Medicine Physician	Thousand Oaks, CA
1083726871	California Kidney Medical Group Inc	Organization	Nephrology Physician	Thousand Oaks, CA
1164927943	Cameron Zadeh	Individual	Internal Medicine Physician	Thousand Oaks, CA
1578311015	Cardiology Vascular & Endocrinology Center Professional Corporation	Organization	Cardiovascular Disease Physician	Thousand Oaks, CA
1306039383	Charles Johnson	Individual	Cardiovascular Disease Physician	Thousand Oaks, CA
1144332685	Charles P. Johnson, M.D., Inc .	Organization	Cardiovascular Disease Physician	Thousand Oaks, CA
1922369008	Chongwei Cui	Individual	Allergy & Immunology (Internal Medicine) Physician	Thousand Oaks, CA
1861524894	Christian Dequet, D.O., F.A.C.R., Inc	Organization	Rheumatology Physician	Thousand Oaks, CA
1497758957	Christina Jacob	Individual	Internal Medicine Physician	Thousand Oaks, CA
1891738142	Christine E. Dahlin, M.D. Inc.	Organization	Internal Medicine Physician	Thousand Oaks, CA
1124058169	Christopher Purmer	Individual	Cardiovascular Disease Physician	Thousand Oaks, CA
1740859040	City of Hope Medical Foundation	Organization	Hematology & Oncology Physician	Thousand Oaks, CA
1588084859	Conejo Valley Electrophysiology Inc.	Organization	Clinical Cardiac Electrophysiology Physician	Thousand Oaks, CA
1699179762	Conejo Valley Multispecialty Medical Group	Organization	Internal Medicine Physician	Thousand Oaks, CA
1992801716	Corinna Mosher	Individual	Internal Medicine Physician	Thousand Oaks, CA
1306156260	Cristina S. Wiese. M.D. Inc.	Organization	Gastroenterology Physician	Thousand Oaks, CA
1710921564	Cristina Wiese	Individual	Gastroenterology Physician	Thousand Oaks, CA
1962404723	David Aliabadi	Individual	Interventional Cardiology Physician	Thousand Oaks, CA

Frequently asked questions

How many Internal Medicine providers are in Thousand Oaks, CA?

The latest NPPES snapshot lists 209 active Internal Medicine providers with a practice address in Thousand Oaks, California.

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

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.