Medicare Enrollment 2024 Deadline. Most people sign up for part a (hospital insurance) and part b (medical insurance) when they're first eligible, typically at age 65. Everything you need to know about the annual election period, including opportunities to change coverage, eligibility details and enrollment deadlines.

The date your coverage starts depends on which month you sign up during your initial enrollment period. If you’re 65 or older, you can enroll online for parts a and b, or part a only.