HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

KEITH LYNN MARTIN, MD

GASTROENTEROLOGY

Medical school: UNIVERSITY OF OKLAHOMA COLLEGE OF MEDICINE

Graduated: 1975

Also: INTERNAL MEDICINE

NPI: 1649280546

Practice Locations (2)

REGENTS OF THE UNIVERSITY OF CALIFORNIA

101 THE CITY DR S

ORANGE, CA 928683201

7144567002

UC REGENTS

101 THE CITY DR S

ORANGE, CA 928683201

7144567002

Source: CMS National Downloadable File, September 2026.

KEITH MARTIN, MD | HealthCareAtlasUSA