Dr. Jo grew up in Los Angeles and attended college at Duke University. After obtaining his M.D. degree from the University of California, San Diego, Dr. Jo performed his internship and residency at Tufts-New England Medical Center in Boston, Massachusetts. Dr. Jo completed his fellowship training in gastroenterology and hepatology at Massachusetts General Hospital, one of the two major hospitals affiliated with Harvard Medical School. Dr. Jo was engaged in colon cancer research and taught at Harvard Medical School during his fellowship. Dr. Jo has several publications in national journals regarding the genetics and treatment of colon cancer.  Dr. Jo was on the medical staff at the University of California, San Diego and practiced in Laguna Hills, California before joining the San Bernardino and Redlands community in 2007.