The Annual Enrollment Period (AEP) is each year from October 15 to December 7, and it's when you can make changes to your Medicare coverage.

At this time, you can enroll in or leave a Medicare Advantage plan, you can switch Medicare Advantage companies or plans, and you can add a Part D plan.

You must make changes during this period or you won't be able to get coverage unless you have a Special Enrollment Period (SEP).

Any new coverage you get during this time will start on January 1.