S. Ryan Greysen, MD, MHS, SFHM, is a hospitalist with training in social sciences and health services research focused on outcomes of care and interventions to maximize the health and independence of older adults during and after hospitalization. Dr. Greysen’s research has focused on understanding the health, functional status, and independence of seniors using large datasets, mixed methods, and clinical trials. Another cross-cutting theme in his research is the use of novel technologies to better engage patients in their health and healthcare through platforms such as smartphones, tablets, wearable devices (activity trackers), and patient portals or personal health records that link to electronic health records.
Dr. Greysen was recruited to Penn in 2016 as Chief for Hospital Medicine and in 2019 he was appointed Executive Director for the Penn Center for Evidence-based Practice which is funded by AHRQ as 1 of only 9 Evidence-to-Practice Centers (EPCs) in the US. In 2021, he joined the Philadelphia VA HSR&D Center for Health Equity Research and Policy (CHERP).
His current research is funded with 2 NIH R01s and a VA Merit Award which utilize gamification and social incentives to increase physical activity in vulnerable populations. The overall goal of his research program is to improve the care of Veterans and vulnerable, older adults by generating new evidence through rigorous trials, disseminating innovative models, and transforming practice to create age-friendly health systems.
His research has been published in JAMA, JAMA Internal Medicine, Annals of Internal Medicine, and Journal of Hospital Medicine, and has been covered by the New York Times, Washington Post, and National Public Radio.
Areas of Expertise | Acute Care/Critical Care/Hospitals, Advanced Practice Providers, Behavior Change
Clinical Area | General Internal Medicine, Hospital Medicine
Selected Publications:
Greysen SR, Waddell KJ, Patel MS. Exploring Wearables to Focus on the "Sweet Spot" of Physical Activity and Sleep After Hospitalization: Secondary Analysis. JMIR Mhealth Uhealth. 2022 Apr 27;10(4):e30089. doi: 10.2196/30089. PMID: 35476034; PMCID: PMC9096634.
Waddell KJ, Patel MS, Clark K, Harrington TO, Greysen SR. Effect of Gamification With Social Incentives on Daily Steps After Stroke: A Randomized Clinical Trial. JAMA Neurol. 2022 May 1;79(5):528-530. doi: 10.1001/jamaneurol.2022.0231. PMID: 35344027; PMCID: PMC8961396.
Siddique SM, Tipton K, Leas B, Greysen SR, Mull NK, Lane-Fall M, McShea K, Tsou AY. Interventions to Reduce Hospital Length of Stay in High-risk Populations: A Systematic Review. JAMA Netw Open. 2021 Sep 1;4(9):e2125846. doi: 10.1001/jamanetworkopen.2021.25846. PMID: 34542615; PMCID: PMC8453321.
Pereira DE, Welch SA, Montgomery CD, Hatcher JB, Duggan MC, Greysen SR. Low hospital mobility-resurgence of an old epidemic within a new pandemic and future solutions. Age Ageing. 2021 Sep 11;50(5):1439-1441. doi: 10.1093/ageing/afab132. PMID: 34077507; PMCID: PMC8195231.
Greysen SR, Auerbach AD, Mitchell MD, Goldstein JN, Weiss R, Esmaili A, Kuye I, Manjarrez E, Bann M, Schnipper JL; HOMERuN collaborative working group. Discharge Practices for COVID-19 Patients: Rapid Review of Published Guidance and Synthesis of Documents and Practices at 22 US Academic Medical Centers. J Gen Intern Med. 2021 Jun;36(6):1715-1721. doi: 10.1007/s11606-021-06711-x. Epub 2021 Apr 9. PMID: 33835314; PMCID: PMC8034037.
Greysen SR, Changolkar S, Small DS, Reale C, Rareshide CAL, Mercede A, Snider CK, Greysen HM, Trotta R, Halpern SD, Patel MS. Effect of Behaviorally Designed Gamification With a Social Support Partner to Increase Mobility After Hospital Discharge: A Randomized Clinical Trial. JAMA Netw Open. 2021 Mar 1;4(3):e210952. doi: 10.1001/jamanetworkopen.2021.0952. PMID: 33760089; PMCID: PMC7991973.
Fang M, Mao F, Hume E, Greysen SR. Establishing an Orthopedic Excess Hospital Days in Acute Care Program. J Hosp Med. 2020 Jul;15(11):659-664. doi: 10.12788/jhm.3440. PMID: 32816668; PMCID: PMC7657655.
Auerbach A, O'Leary KJ, Greysen SR, Harrison JD, Kripalani S, Ruhnke GW, Vasilevskis EE, Maselli J, Fang MC, Herzig SJ, Lee T; HOMERuN COVID-19 Collaborative Group. Hospital Ward Adaptation During the COVID-19 Pandemic: A National Survey of Academic Medical Centers. J Hosp Med. 2020 Aug;15(8):483-488. doi: 10.12788/jhm.3476. PMID: 32804610; PMCID: PMC7518133.
Kohn R, Harhay MO, Bayes B, Song H, Halpern SD, Kerlin MP, Greysen SR. Influence of bedspacing on outcomes of hospitalised medicine service patients: a retrospective cohort study. BMJ Qual Saf. 2021 Feb;30(2):116-122. doi: 10.1136/bmjqs-2019-010675. Epub 2020 Apr 16. PMID: 32299956; PMCID: PMC7572738.
Manges K, Groves PS, Farag A, Peterson R, Harton J, Greysen SR. A mixed methods study examining teamwork shared mental models of interprofessional teams during hospital discharge. BMJ Qual Saf. 2020 Jun;29(6):499-508. doi: 10.1136/bmjqs-2019-009716. Epub 2019 Nov 27. PMID: 31776201.
Visit Dr. Greysen's Google Scholar page to view more publications