Do I Need To Sign Up For Medicare Every Year? 
No . Once you have enrolled in Medicare Part A and or B you are always on it unless you choose to cancel it for some reason . With Medicare Part D -LRB- your drug coverage -RRB- you are wise to review it every year between October 15th and December 7th because you plan can change even if you did n't do anything to change it . Also if you chose to go with Medicare Part C -LRB- Medicare Advantage -RRB- you need to meet with your agent every year between October 15th and December 7th to learn of your changes which take effect January 1st each year . But original Medicare Parts A & B stay basically the same year after year and you never have to reapply . 