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Geriatric Medicine (Internal Medicine) in Orange, California

Data updated monthly · Last refresh September 2026

8 Geriatric Medicine (Internal Medicine) providers practice in Orange. Listings are drawn from federal public records and are not endorsements.

Geriatric Medicine (Internal Medicine) providers in Orange

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Angela Tan, MD
Orange, CA · $8,668 in drug and device payments (2025) · (714) 456-6770
Dr. K.a. Manisha Perera
Orange, CA · No drug or device payments recorded (2025) · Telehealth · (714) 456-7007
Dr. Kassandra King, DO
Orange, CA · No drug or device payments recorded (2025) · (714) 880-7812
Dr. Kenneth Tram, MD
Orange, CA · No drug or device payments recorded (2025) · Telehealth · (714) 838-8848
Dr. Mary Harward, M.D.
Orange, CA · No drug or device payments recorded (2025) · (714) 532-4915
Dr. Robert Buster, M.D.
Orange, CA · No drug or device payments recorded (2025) · (714) 639-2600
Dr. Shashidar Acharya, M.D.
Orange, CA · No drug or device payments recorded (2025) · (714) 771-2800
Dr. Xaviour Walker, M.D.
Orange, CA · No drug or device payments recorded (2025) · (714) 456-6576

Common questions

How many Geriatric Medicine (Internal Medicine) providers are in Orange, California?

There are 8 Geriatric Medicine (Internal Medicine) providers with active NPI records practicing in Orange, according to federal NPPES data refreshed monthly.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in Orange Geriatric Medicine (Internal Medicine) across California

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.