visit the Medicare website , or call 1 - 800-MEDICARE 1 - 800 - 633 - 4227 ; TTY 1 - 877 - 486 - 2048
Btw, What if I don't any have specific document to submit?
we will ask to see other documents  Any documents submitted , including the following , must be current not expired and show your name , identifying information date of birth or age and preferably a recent photograph
What else can I use as proof of identity?