En español | Medicare: Am I Eligible? AARP's Medicare Question and Answer Tool works as an online planning resource, designed to assist those who are eligible for Medicare benefits as well as those who are unsure. The Medicare Q and A Tool acts also as a guide, explaining in plain English eligibility, how to enroll, when to enroll and how to choose the best plan for you. AARP's Medicare Question and Answer Tool is a starting point toward an informed decision about your Medicare coverage and your eligibility.