How To Register For Medicare At 65? 
To register for Medicare at age 65 , you can go to your local Social Security office , sign up online at WEBSITELINK , or call1-800-772-1213 . You should register in the three months before or after the month of your 65th birthday , or the month of your 65th birthday . If you are receiving Social Security benefits at age 65 , you will automatically be enrolled in Medicare Part A and B . 