Dae Hyun Kim, M.D., M.P.H., Sc.D. is an Instructor in Medicine at Harvard Medical School and a staff geriatrician and epidemiologist in the Division of Gerontology at Beth Israel Deaconess Medical Center. Dr. Kim is board-certified in Geriatric Medicine and Internal Medicine. He received M.D. from Yonsei University, Seoul, South Korea, M.P.H. from Johns Hopkins School of Public Health, and Sc.D. in epidemiology from Harvard School of Public Health. He completed his internal medicine residency at Thomas Jefferson University Hospital in Philadelphia and the Harvard Combined Geriatrics Fellowship at Beth Israel Deaconess Medical Center. Dr. Kim’s clinical and research interest includes predicting prognosis and evaluating frailty and functional status of older patients who are undergoing cardiac surgery. His current research focuses on comparative effectiveness of transcatheter versus surgical aortic valve replacement in improving cognitive and physical functional status in older patients with severe aortic stenosis, developing prediction models of mortality and disability, and measuring frailty level in large datasets of health care utilization. He is actively involved in educating Harvard geriatrics fellows and graduate students at Harvard School of Public Health.