Understanding medicare advantage & medicare drug plan enrollment periods. You can only join, switch, or drop a medicare advantage plan (part c) or. There are multiple opportunities to enroll in medicare. Webthe three medicare enrollment periods — initial, special and general — are specific time frames when you can enroll in medicare based on certain circumstances, such as choosing to delay enrollment if you continue working past age 65. Webwhen to sign up for medicare. Most people sign up for part a (hospital insurance) and part b (medical insurance) when they're first eligible, typically at age 65. It's important to sign. Webthis publication has information about enrolling in medicare advantage plans (part c) and medicare prescription drug plans (part d), including who can sign up, when to sign up,.
