Medicare-Related Enrollment Dates and Guidelines

September & October—Review and Compare Medicare Advantage Plans

Review any notices from your plan about changes for next year. To learn more about your options download Medicare and You 2024

Compare: In October, use Medicare’s tools to find a plan that meets your needs

This is the one time of year when ALL people with Medicare can make changes to their health and prescription drug plans for the next year

Between: October 15- December 7

Change from Original Medicare to a Medicare Advantage Plan.
Change from a Medicare Advantage Plan back to Original Medicare.
Switch from one Medicare Advantage Plan to another Medicare Advantage Plan.
Switch from a Medicare Advantage Plan that doesn’t offer drug coverage to a Medicare Advantage Plan that offers drug coverage.
Switch from a Medicare Advantage Plan that offers drug coverage to a Medicare Advantage Plan that doesn’t offer drug coverage.
Join a Medicare Prescription Drug Plan.
Switch from one Medicare Prescription Drug Plan to another Medicare Prescription Drug Plan.
Drop your Medicare prescription drug coverage completely.

January 1—Coverage Begins

Your new coverage begins if you switched to a new plan. If you stay with the same plan, any changes to coverage, benefits, or costs for the new year will begin on January 1

Between January 1–March 31

If you’re in a Medicare Advantage Plan (like an HMO or PPO), you can make one change to a different plan or switch back to Original Medicare (and join a stand-alone Medicare Prescription Drug Plan) once during this time. Any changes you make will be effective the first of the month after the plan gets your request

When to buy a Medicare Supplement policy

The best time to buy a Medigap policy is during your Medigap Open Enrollment Period, which is the six-month period that begins on the first day of the month in which you turn 65 or older and have enrolled in Part B. (Some states have additional Open Enrollment Periods.) After this enrollment period, you may not be able to buy a Medigap policy. If you are able to buy one, it may cost more.
If you delay in Part B because you have group health coverage based on your (or your spouse's) current employment, your Medigap Open Enrollment Period won't start until you sign up for Part B.