This Kaiser Family Foundation report, prepared by researchers at Mathematica Policy Research Inc., presents the March monthly data on Medicare Advantage plan participation, enrollment and penetration.  It also summarizes recent activities by the Centers for Medicare and Medicaid Services (CMS), participating health plans, and the research community pertaining to the Medicare Advantage program and prescription drug plans that began serving the Medicare population in January 2006. 

Kaiser Family Foundation. (2010). Tracking Medicare health and prescription drug plans report – March 2010.