When am I eligible to enroll in Medicare? Share You are eligible for Medicare when you turn 65. Some people get Medicare automatically, and some have to sign up. You may have to sign up if you’re 65 (or almost 65) and not getting Social Security. Frequently Asked Questions - Medicare FAQsHow much does Medicare cost me?How often do you have to enroll in Medicare?How to change my Medicare plan?If I am 65 years old I am working, but I am eligible for Medicare?If I move out of State and have Medicare, do I have to make any changes?What if I have Medicare and a health plan for my job, but I am retiring?What is a Medicare Advantage Plan?