Dr. Wei-Fang J Ko is a California state licensed medical doctor, specializing in Gastroenterology. Graduated Magna Cum Laude from Taiwan, completed residency training in University Minn Hospital, and completed the Gastroenterology specialist training at University Calif San Francisco. Dr. Ko currently is working at Sutter Health, located in 27206 Calaroga Ave Hayward CA 94545 Please call +1-510-887-1777 to contact. Access cdoc101.com on a desktop computer to view more details. | |||