Benjamin Sun, MD, MPP, is a Professor and Chair of the Department of Emergency Medicine in the Perelman School of Medicine at the University Pennsylvania. He is broadly interested in improving the delivery of emergency care. His research portfolio has included evaluation of syncope in the emergency department, identification organizational best practices to mitigate emergency department crowding, and evaluation of policy interventions to improve opioid prescribing. He is currently the principal investigator on an NIH funded study to assess the comparative effectiveness of testing and disposition strategies for the evaluation of suspected acute coronary syndrome. This is a prospective multisite study of over 100,000 patients who received an emergency department evaluation for chest pain within an integrated health system.