Where To Sign Up For Medicare Part B? 
You can sign up for Medicare Part A and Part B online at WEBSITELINK . Or you can visit your local Social Security office to sign up . A website where you can input your zip code to find the address of your local Social Security Office is at this link : WEBSITELINK r you can call Social Security Medicare at 1-800-772-1213 . If you worked for the Railroad , call the Railroad Retirement Board at 1-877-772-5772 . 