The University of Pennsylvania Health System (UPHS) is a major multi-hospital health system headquartered in Philadelphia, Pennsylvania. UPHS and the Perelman School of Medicine at the University of Pennsylvania together comprise Penn Medicine, a clinical and research entity of the University of Pennsylvania. UPHS hospitals include the Hospital of the University of Pennsylvania, Penn Presbyterian Medical Center, Pennsylvania Hospital, Chester County Hospital, Lancaster General Hospital, Princeton Medical Center, and Doylestown Hospital.