No. You are not required to sign up for Medicare annually or make changes during the Medicare Annual Enrollment Period. It is a time for optional changes, such as enrolling in a plan that is a better fit for your health or financial needs. Plans are subject to change their coverage, benefits, costs and service area each year, and your needs may or may not be met depending on those changes. While you are not required to sign up for a new plan or make changes to your coverage during AEP, if you think you may want to change your coverage, this is the ideal time. Enrolling in a new plan outside of the Annual enrollment Period is subject to special enrollment circumstances, and you might end up stuck with a plan that leaves you wanting more.