Medicare Part D - Number of Participants

Number of Participants

At the start of the program in January 2006, it was expected that eleven million people would be covered by Medicare Part D; of those, six million would be dual eligible. About two million people who were covered by employers would likely lose their employee benefits.

As of January 30, 2007, nearly 24 million individuals were receiving prescription drug coverage through Medicare Part D (PDPs and MA-PDs combined), according to CMS. There are other methods of receiving drug coverage when enrolled in Medicare, including the Retiree Drug Subsidy (RDS), Federal retiree programs such as TRICARE and Federal Employees Health Benefits Program (FEHBP) or alternative sources, such as the Department of Veterans Affairs. Including people in these categories, more than 39 million Americans are covered for prescriptions.

As of April 2006, the primary private insurance plans providing Medicare Part D coverage were UnitedHealth with 3.8 million subscribers, or 27 percent of the total, Humana with 2.4 million, or 18 percent, and WellPoint with 1 million, or 7 percent. Companies with the next largest shares were MemberHealth, with 924,100 subscribers (7 percent); WellCare Health Plans, with 849,700 (6 percent); and Coventry Health Care, with 596,100 (4 percent). CMS offers updated enrollment numbers on their website.