Medicare Part D: Implementation of Beneficiary Premium Stabilization Demonstration

The report was released on February 26, 2026, by the Government Accountability Office (GAO). The GAO analyzed the impact of the voluntary Medicare Part D Premium Stabilization Demonstration (Demonstration) which started in 2025. The Demonstration was intended to stabilize beneficiary monthly premiums and enrollment in Part D standalone prescription drug plans while the plan sponsors adapted to Part D changes implemented in the Inflation Reduction Act. The GAO analyzed Medicare data and concluded that without the demonstration, monthly premiums for standalone Part D plans would have nearly doubled, which would likely have led to lower enrollment . . .