New Search Chester D. Zahn M.D. (626) 287-7222 Primary Specialties Internal Medicine (Board Certified) Practice Started 1991 Date Appointed 1995 Additional Languages Spoken Mandarin, Chinese, Japanese, Spanish Primary Office Address: 1026 E. Las Tunas Dr. San Gabriel, CA 91776 Recommend this Physician Get Directions Education Stanford Medical School Residency: Montefiore/Einstein Hospitals, Bronx, NY Fellowship: University of Michigan Hospitals-GI Other Specialties/Certifications 2013 Fellow-American College of Physicians Areas of Expertise Gastroenterology Physician Bio Dr. Zahn grew up in Japan and was educated in the United States since high school. Dr. Zahn has practiced in Los Angeles since 1991.