CMS Ends Part D Premium Stabilization Demonstration After 2026

CMS is ending the Part D Premium Stabilization Demonstration after 2026. Here is what the evidence establishes about prior premium reductions, federal costs, CMS’s rationale, and the unresolved 2027 effects.

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Part D Premium Stabilization Demonstration shown as aligned data streams separating into multiple 2027 pathways.
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TL;DR:
CMS will end the Part D Premium Stabilization Demonstration after 2026. The program reduced standalone drug-plan premiums, but final public 2027 plan prices and benefits remain unavailable.

What you need to know

  • The change: CMS will discontinue the Part D Premium Stabilization Demonstration at the end of calendar year 2026.
  • Who is affected: The change directly concerns standalone prescription drug plans used by beneficiaries in traditional Medicare.
  • Why it matters: The demonstration substantially reduced PDP premiums and, in 2025, temporarily shifted additional financial risk to Medicare.
  • What to do first: Track plan-specific premiums and total plan value rather than relying on the national base premium alone.
  • Key trigger: Public release of final 2027 plan premiums and benefits will provide the first plan-level evidence available to beneficiaries and outside analysts of where the adjustment appears.

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