You can make changes to your Medicare Advantage and Medicare drug coverage when certain events happen in your life, like if you move or you lose other coverage. These chances to make changes are called Special Enrollment Periods. The types of changes you can make and the timing depend on your life event. If you have questions or need help making enrollment changes, call 1-800-MEDICARE (1-800-633-4227). TTY users can call 1-877-486-2048.