"To defer Medicare Part B enrollment ,
you should communicate this to SSA by contacting them at (800) 772-1213.
은퇴 계획에 관하여 현재 상황을 사회보장국에 전화를 하여 update 를 해야 겠죠.
This will ensure that you avoid a late enrollment penalty when you decide to retire and enroll in Medicare Part B upon retirement."