Does Your Medicare Number Ever Change? 
Your Medicare number will normally stay the same unless you request to change it . Also , it normally does not need to renewed or replaced , so if you get a call asking for your Medicare number for purposes of renewal , do not give out that information . If you have asked for a replacement , it will be done by a written request . Medicare numbers can change if the circumstances for how your are receiving Medicare have changed . E.g. . You were receiving Medicare through a spouse who passed away , and remarried and are now receiving Medicare through a new spouse . 