You can first sign up for Medicare during the seven-month window that includes the three months before your 65th birthday, your birthday month and the three months after the month you turn 65. Coverage can start beginning the month you turn 65. If you fail to sign up during this initial enrollment period, you could be charged a late enrollment penalty for as long as you are enrolled in Medicare. If you delay Medicare enrollment due to group health insurance through your current job, sign up for Medicare within eight months of leaving the job or the coverage ending to avoid the penalty.Premium amounts
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