Lee A. Fleisher, MD, is the Chief Medical Officer and Director of the Center for Clinical Standards and Quality for the Centers for Medicare and Medicaid Services in July 2020. In this capacity, he is responsible for executing all national clinical, quality, and safety standards for healthcare facilities and providers, as well as establishing coverage determinations for items and services that improve health outcomes for Medicare beneficiaries. He is also Professor Emeritus and Former Chair of Anesthesiology and Critical Care and Professor of Medicine at the University of Pennsylvania Perelman School of Medicine. He is also an Affiliated Faculty of the Quattrone Center for the Fair Administration of Justice at the University of Pennsylvania Carey Law School and a Senior Fellow of the Leonard Davis Institute of Health Economics.

Lee received his medical degree from the State University of New York at Stony Brook. His research focuses on perioperative cardiovascular risk assessment and reduction, measurement of quality of care, and health policy. He has received numerous grants related to these subjects and has published 175+ original articles, over 200 editorials, reviews, and book chapters, and 9 books. He was elected to the National Academy of Medicine (formerly Institute of Medicine) in 2007.