Mark B. McClellan, MD, PhD, serves as Co-chair of the Health Care Payment Learning & Action Network’s Guiding Committee. He is Robert Margolis Professor of Business, Medicine, and Policy at Duke University and the Director of the Duke Margolis Center for Health Policy. Previously he was a senior fellow and Director of the Health Care Innovation and Value Initiatives at the Brookings Institution. A doctor and economist, he also has a distinguished record in public service and in academic research. Dr. McClellan is a former administrator of the Centers for Medicare & Medicaid Services (CMS) and a former commissioner of the U.S. Food and Drug Administration (FDA) where he developed and implemented major reforms in health policy. He is also a former professor of economics with tenure at Stanford University.