Ready to sign up for Medicare Advantage benefits? Depending on your situation, you have different times during the year you can sign up. Just keep reading to learn about enrolling at the right time.


Be sure to take note of your enrollment period. You can sign up for a Medicare plan during this time. You can avoid delays and penalties when you enroll at the right time.

Initial Enrollment Period

This is your seven-month window to join a Medicare plan. This period begins three months before the month you turn 65. It runs through your birthday month and ends three months after the month you turn 65.

Annual Enrollment Period

Anyone can make changes to their coverage and enroll in a Medicare plan each year, from October 15 to December 7. If you choose to make a change during the Annual Enrollment Period, your new coverage won’t begin until January 1.

Medicare Advantage Open Enrollment Period

This period takes place from January 1 through March 31 annually. It allows individuals enrolled in a Medicare Advantage plan to make a one-time election to go to either another Medicare Advantage plan or Original Medicare. In either case, your new coverage will start on the first day of the month following the month you make a change.

Special Enrollment Period

In situations like the ones below, you may be able to join, switch or drop a Medicare Advantage plan outside the basic enrollment periods.

  • Moving out of your plan’s service area
  • Losing your current health care or prescription drug coverage

Enrolling in an Dual Eligible Special Needs Plan (HMO D-SNP) is easy and we are here to help.

You can set up an appointment to enroll or enroll by phone by calling us at 1-844-934-3324 (TTY: 711), 8 AM to 8 PM, seven days a week.

You may also print the 2024 enrollment form (English|Spanish), complete it and send to:

By mail:

Aetna Medicare
PO Box 7083
London, KY 40742

By fax: