How To Sign Up For Medicare Part B Online? 
Go to WEBSITELINK to apply for Medicare online . This page is the government page to apply for Medicare online . You can not use this page is you want to activate your social security at the same time . This page is for Medicare online enrollment only . If you already have Medicare Part A and want to sign up for Medicare Part B you should call Social Security at -LRB-800-RRB- 772-1213 to activate your Part B coverage . 