Medicare Medicare Advantage Open Enrollment Period — 2027

The next Medicare Advantage Open Enrollment Period opens January 1, 2027 (67 days from October 26, 2026) and runs through March 31, 2027.

From January 1 through March 31, people who are already enrolled in a Medicare Advantage plan can make one change: switch to a different Medicare Advantage plan, or leave Medicare Advantage and return to Original Medicare (with the option to add a stand-alone Part D plan). People on Original Medicare cannot use this window to join a Medicare Advantage plan.

Medigap warning: leaving a Medicare Advantage plan for Original Medicare does not guarantee that a Medigap company must accept you. Outside your Medigap open enrollment or a guaranteed-issue situation, Medigap applications can be medically underwritten. Read the Medigap guide before making this switch.

Frequently asked questions

Who can use the Medicare Advantage Open Enrollment Period?

Only people already enrolled in a Medicare Advantage plan. Each person gets one change between January 1 and March 31.

Can I join a Medicare Advantage plan for the first time during this window?

No. This window is only for people who already have a Medicare Advantage plan.

Researched and reviewed by Jordan Diaz, Licensed Insurance Agent, NPN 18910035, Senior Benefit Assistance. This page does not display plan data; the plan figures elsewhere in this section come from CMS’s published CY2027 Landscape Source File, data as of October 18, 2026. Last reviewed: October 26, 2026.