Dr. Ko is a licensed Gastroenterology in CA. Graduated in 1995. Medical degree obtained from Johns Hopkins School of Medicine. Completed residency training at Beth Israel Hospital and fellowship training at Stanford Medicine. Currently practices at UCSF Health (UCSF Health), located at 1825 Fourth St, San Francisco, CA 94158. Dr. Ko specializes in Anal cancer, Esophageal cancer, Peritoneal cancer, Cholangiocarcinoma, Gastrointestinal cancer, Rectal cancer, Colon cancer, Liver cancer, Stomach cancer ..... . In addition to English, Dr. Ko speaks Mandarin.