1. Most of the authors are with the National Health Statistics Group (NHSG), Office of the Actuary, Centers for Medicare and Medicaid Services, in Baltimore, Maryland. John Poisal () is deputy director of the NHSG. Chris Truffer is an actuary in the Medicare and Medicaid Cost Estimates Group. Sheila Smith, Andrea Sisko, Cathy Cowan, Sean Keehan, and Bridget Dickensheets are economists in the NHSG. Other members of the National Health Expenditure Accounts Projections Team are listed at the end of this paper.