Dr. Chang has committed his entire professional life to bridging the gap between clinical surgery and public health. Dr. Chang has published more than 250 peer-reviewed original research articles and book chapters on various issues related to surgical outcomes research, disparity research, quality improvement, and health policy issues, and has received numerous awards, including the EMS Geriatrics Award from the governor of Maryland. Dr. Chang is a member of several advisory committees and review groups, such as the Congressionally Directed Medical Research Programs at the Department of Defense, the Roundtable on Emergency Trauma Research sponsored by the National Institutes of Health, the California EMS Authority Core Measures Task Force, and the Surgical Patient Safety Advisory Committee for the State of California.