Medicare Open Enrollment runs October 15–December 7, 2026; changes take effect January 1, 2027.

The plan must receive your enrollment request by December 7. People with Medicare can change Medicare Advantage or drug coverage, or switch between Original Medicare and Medicare Advantage. Medicare’s enrollment guidance

For 2027, the maximum Part D deductible is $700 and the out-of-pocket threshold for covered Part D drugs is $2,400, up from $615 and $2,100 in 2026. After reaching the threshold, you pay nothing for covered Part D drugs for the rest of the calendar year. Medicare drug costs

The 2027 Part D national base beneficiary premium is $41.33 per month; it is a benchmark, not necessarily your plan premium. The temporary premium stabilization demonstration for stand-alone drug plans ends after 2026. CMS

For 2026, the standard Part B premium is $202.90 per month and the deductible is $283. Higher-income people may pay income-related additions for Parts B and D. CMS 2026 rates

Independent KFF analysis estimates a $51 average monthly stand-alone drug-plan premium in 2027 if current enrollees keep their plans. CMS projects $36; these estimates use different assumptions and neither is an individual plan quote. KFF · CMS