In part 1 of this 2-part discussion, economist and physician, Dr. Mark McClellan, is interviewed by Daniel Bailey about the changes in the US system for the delivery and finance of health care.  Dr. McClellan is Senior Fellow at Brookings and Director of their Initiative on Innovation and Value in Health Care Reform.  He previously served as Administrator of CMS and Commissioner of the FDA.  In this interview, he focuses on the changes in care delivery and how they affect quality and affordability.  In particular, Dr. McClellan describes the effect of ACOs, their recent results and expected future.  This podcast is a follow-up to Dr. McClellan's keynote address at the SOA Health Meeting in June 2014.