He attended Tufts University School of Medicine and then went on to complete his residency at Beth Israel Deaconess Medical Center. Dr. Chang has a special interest in heart attack. He accepts Blue Cross/Blue Shield, Coventry, TRICARE, and more. His distinctions include: Philadelphia Super Doctors; Recognized in Philadelphia magazine's annual Top Docs issue, 2010-2012, 2014-2017; and Recognized by America's Top Doctors 2012-14. In addition to English, he speaks Korean. Dr. Chang is affiliated with Hospital of the University of Pennsylvania (HUP) and Penn Presbyterian Medical Center.