In a new report from AcademyHealth, health care leaders share their views on how to change the trajectory of health care costs. The experts include: Marilyn Tavenner of the Centers for Medicare and Medicaid Services, Helen Darling of the National Business Group on Health, Susan Reinhard of AARP, Dan Mendelson of Avalere Health, and Kenneth Thorpe of Emory University. The report is based on a series of three briefings supported by The Commonwealth Fund and convened by AcademyHealth last year.