Enrollment Period for Medicare Advantage Plans 2027: The Dated Calendar for This Cycle

December 7, 2026 falls on a Monday; it is the last day to choose a plan for January 1, 2027.

Changes made January through March 2027 start the first day of the next month.

Plans leaving Medicare for 2027 give members until February 28, 2027 to replace them.

Projected 2027 figures: an average $12.00 Advantage premium and a $2,400 Part D out-of-pocket cap.

The monthly premium and any Part B giveback amount for 2027.

The in-network out-of-pocket maximum.

Tier changes for each prescription you take.

Benefits listed as ending, such as reductions in dental, vision or over-the-counter allowances, which vary by plan and area.

Join

Enroll in a Medicare Advantage plan from Original Medicare

Switch

Move to a different Medicare Advantage plan

Leave

Return to Original Medicare and pick a drug plan

A proposal to let any provider network change, not only a significant one, open a switch window was not finalized; the significant-change standard stays.

CMS confirmed that certain case-by-case windows, including exceptional circumstances, require its approval.

Dual special needs plans that passively enroll members must give a 120-day continuity-of-care transition period.

The monthly window for people with Medicaid or Extra Help, introduced in 2025, continues with its limits.

The Part D out-of-pocket cap rises to $2,400 for 2027, with a maximum deductible of $700.

December 8, 2026 to February 28, 2027 Members of a plan that is not renewing for 2027 can still choose a replacement.

January 1 to March 31, 2027 Current members can make one change or return to Original Medicare.

December 8, 2026 to November 30, 2027 Anyone can move once into a 5-star plan if one serves their area.

Any month in 2027 Qualifying events, such as a move or a change in Medicaid, open their own windows.