Since 2006, Medicare beneficiaries have had access through Medicare Part D to prescription drug coverage offered by private plans, either stand-alone prescription drug plans (PDPs) or Medicare Advantage prescription drug plans (MA-PD plans).
Now in its tenth year, Part D has evolved due to changes in the private plan marketplace and the laws and regulations that govern the program. This report presents findings from an analysis of the Medicare Part D marketplace in 2015 and changes in features of the drug benefit offered by Part D plans since 2006.
In 2015, more than 39 million Medicare beneficiaries are enrolled in Medicare drug plans. Since 2006, the share of Medicare beneficiaries enrolled in a Part D plan has increased from 53 percent to 72 percent of all eligible Medicare beneficiaries.