January 01 - March 31 - Medicare Advantage Open Enrollment - Change your Plan
Between January 01 and March 31 every year, a beneficiary can CHANGE their Medicare Advantage Plan.
Look for the heading of Medicare ADVANTAGE OPEN ENROLLMENT at this site -
Medicare.gov - Medicare Open Enrollment 01/01 - 03/31
So if you don’t like the MA plan you have now, your can change to another MA plan during this period.