When does Medicare Part B coverage become effective?
The effective date of your Medicare Part B coverage will vary depending on when you apply. If you are not enrolled in Medicare Parts A and B automatically, it is generally best to enroll within the first few months of your Initial Enrollment Period. If you do this, your coverage will begin on the first day of the month you turn 65. If you choose to wait until the month of your 65th birthday or later, your Part B coverage will be delayed by 1-3 months. The longer you choose to postpone your enrollment, the longer you will have to wait before your coverage takes effect. Those who apply for Medicare during General Enrollment (which runs January 1st through March 31st each year) will not see their coverage go into effect until July of that year.
What is my Medicare Part B premium?