Dr. Nancy Nai Hsin Sun is a California state licensed medical doctor, specializing in Emergency Medicine. Graduated Magna Cum Laude from George Washington University School of Medicine, completed residency training in Penn Medicine, Dr. Sun currently is working at Adventist Health, located in 2975 N Sycamore Dr Simi Valley CA 93065 Please call +1-805-955-6100 to contact. Access cdoc101.com on a desktop computer to view more details. | |||