Founded at the Abramson Cancer Center at the University of Pennsylvania
Ryan Greysen

Ryan Greysen, MD, MHS, MA

Chief of Hospital Medicine, Medicine, Perelman School of Medicine

S. Ryan Greysen, MD, MHS, MA has been the Section Chief of Hospital Medicine in Penn’s Division of General Internal Medicine since August 2016. As Section Chief, Dr. Greysen leads the development of a scalable model for academic hospital medicine across all sites within Penn Medicine that will engage all faculty in clinical, educational, quality, safety, and research excellence. The Section currently maintains a core faculty of 35 hospitalists who provide care across the Penn network.


Dr. Greysen’s quality, safety, and research efforts focus on improving hospital and transition care for vulnerable patients, particularly older adults with multiple morbidities. He launched the first ACE program at UCSF Medical Center and obtained extramural funding from the NIH National Institute on Aging as well as significant intramural funding to study patient-centered stressors such as poor functional status, mobility, sleep, and engagement in care. He is also keenly interested in the potential for personalized mobile technologies to help alleviate these stressors and increase patient and caregiver engagement in acute and recovery care. He is the first recipient of the Junior Investigator Award from the Society of Hospital Medicine in 2015 as well as the first hospitalist to be awarded the Outstanding Junior Investigator Award by the Society of General Internal Medicine and the American Geriatrics Society, both in 2016.


A native Texan, Dr. Greysen received both his BA and MD with Honors from the University of Texas. He completed residency training in Internal Medicine (Primary Care) at George Washington University, graduate study in History and Sociology of Science at Penn (MA ‘03), and post-doctoral training at Yale (MHS) as a Robert Wood Johnson Clinical Scholar. Before coming to Penn, he was an Assistant Professor at the University of California, San Francisco (UCSF) in the Division of Hospital Medicine.

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