These briefs present monthly data on Medicare Advantage participation, enrollment and penetration. They also summarize 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. The reports were prepared by researchers at Mathematica Policy Research Inc. 
 
 Current Report

 March 2008 Report (.pdf)

 February 2008 Report (.pdf)

 January 2008 Report (.pdf)

 December 2007 Report (.pdf)

 November 2007 Report (.pdf)

 October 2007 Report (.pdf)

 September 2007 Report (.pdf)

 August 2007 Report (.pdf)

 July 2007 Report (.pdf)

 June 2007 Report (.pdf)

 May 2007 Report (.pdf)

 April 2007 Report (.pdf)

 March 2007 Report (.pdf)

 Februrary 2007 Report (.pdf)

 January 2007 Report (.pdf)

 December 2006 Report (.pdf)

 November 2006 Report (.pdf)

 October 2006 Report (.pdf)

 September 2006 Report (.pdf)

 August 2006 Report (.pdf)

 July 2006 Report (.pdf)

 June 2006 Report (.pdf)

 April 2006 Report (.pdf)   April 2006 Report Addendum (.pdf)

 March 2006 Report (.pdf)

 February 2006 Report (.pdf)

 January 2006 Report (.pdf)

 December 2005 Report (.pdf)

 November 2005 Report (.pdf)

 October 2005 Report (.pdf)

 September 2005 Report (.pdf)

 August 2005 Report (.pdf)

 July 2005 Report (.pdf)

 June 2005 Report (.pdf)

 May 2005 Report (.pdf)

 April 2005 Report (.pdf)

 March 2005 Report (.pdf)

 February 2005 Report (.pdf)

 January 2005 Report (.pdf)

 December 2004 Report (.pdf)

 November 2004 Report (.pdf)

 October 2004 Report (.pdf)

 September 2004 Report (.pdf)

 August 2004 Report (.pdf)

 July 2004 Report (.pdf)