Medicare Part D Spending Trends: Understanding Key Drivers and the Role of Competition
This brief commissioned by the Foundation examines factors that contributed to Medicare's lower-than-expected spending on prescription drugs under the Medicare Part D drug benefit that started in 2006. Since its launch, Medicare has spent about 30 percent less on Part D benefits than the Congressional Budget Office originally projected. Some cite the program's design, with private plans competing for enrollment, as the driving factor in lower spending; others point to factors in the overall market…