First, you can make a change to one of these plans during the AEP(Annual Enrollment Period) that runs from October 15th through December 7th of each year.

The second enrollment period is new for 2019 and thereafter and runs from January 1st through March 31st of each year.  During this time you may make one selection to a new Medicare Advantage plan with prescription drug coverage. 

Click here for a detailed explanation.