Review your Medicare plan during Open Enrollment, October 15 to December 7
Added
If you have Medicare (or are helping a parent who does), read your plan's yearly notice of changes and compare plans before December 7. During Open Enrollment you can join, switch or drop a Medicare Advantage or drug plan, or change how you get coverage. If you're happy with your current plan, you don't have to do anything.
The result
Result: Medicare.gov: changes made during Open Enrollment take effect January 1, and the plan must get your enrollment request by December 7.
Note: Not financial advice. General information only; check your own situation or ask a qualified professional.
Source
Medicare.gov (Open Enrollment) (opens the original source in a new tab). Check it for the latest numbers before you act.