Dr. Bruce Leff is a professor of medicine at the Johns Hopkins University School of Medicine. Dr. Leff is an internationally recognized leader and researcher in the development, evaluation and dissemination of novel models of care for older adults, including the Hospital at Home, Guided Care, geriatric service line models and medical house call practices. In addition, his research interests extend to issues related to multi-morbidity, performance measurement and case-mix issues. He has a strong interest in health policy issues, is a Health and Aging Policy Fellow of the American Political Science Association, and has served on multiple technical expert panels for the Centers for Medicare and Medicaid Services. An award-winning teacher and mentor, Dr. Leff is involved in directing the basic Medicine Clerkship in the School of Medicine. He currently serves as president of the American Academy of Home Care Physicians as well as a member of the Board of Regents of the American College of Physicians.