Dr. Ko is a licensed Gastroenterology in CA. Graduated in 1986. Medical degree obtained from Taipei Medical University, Taiwan. Completed residency training at University Minn Hospital and fellowship training at University Calif San Francisco. Currently practices at Sutter Health (Sutter Health), located at 27206 Calaroga Ave, Hayward, CA 94545. In addition to English, Dr. Ko speaks Taiwanese and Mandarin and accepts new patients.