A Medicare Part D subsidy called the Premium Stabilization Demonstration is coming to an end this year. The announcement also comes after the president and his administration vowed several times to protect Medicare and this nation’s seniors. To learn more about the cuts, including what it means for seniors on Medicare Part D and for open enrollment, keep scrolling. In 2026, Part D cost seniors an average of $34.50 to $36 a month, however if they bundled Part D with Medicare Advantage, or Part C, it cost around $8 a month. As it stands, 81.2 percent of seniors have Part D coverage, according to CMS.