Only 25% of Humana members will be in plans with four stars or above next year, down from 94% this year, the insurer disclosed Wednesday. The downgrade could wipe out Humana’s profits in 2026.

Shares of Humana have tumbled after the health insurer said a Medicare Advantage quality rating drop will hurt future bonus payments the company receives.

The stock slid more than 10% as the health insurer warned that a steep drop in the federal government’s quality ratings of its Medicare plans could hit its 2026 results.