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CMS release 2027 NAMBA, sunsets premium stabilization demonstration

A photo of the sun setting on a light blue sky with scattered clouds beyond a blue horizon of rippling water.
Photo: Smith Collection/Gado/Getty Images

Kevin Kinsella

1 min read
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CMS set the 2027 Part D bid and premium benchmarks and will end the long running Premium Stabilization Demonstration after the 2026 plan year.

CMS has released the 2027 National Average Monthly Bid Amount (NAMBA) for Medicare Part D, providing plan sponsors with the core pricing inputs needed to prepare bids for the upcoming plan year.

The NAMBA is an enrollment‑weighted average of all Part D plan bids for basic prescription drug coverage and is

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