Learn · Enrollment & Timing
Enrollment & Timing
When to sign up, the windows that open and close, what happens if you're still working at 65, and the penalties for waiting — explained before a deadline forces the decision for you.
The short answer
Your timing shapes your rights. A 7-month Initial Enrollment Period surrounds your 65th birthday; a one-time 6-month window lets you buy a Medigap supplement with no health questions; and missing Part B or D without other creditable coverage can add a penalty that follows you for life. If you're still working with employer coverage, the rules change — verify before you act.
Articles in this topic
Read in order, or jump to what you need.
The Medicare Dates That Actually Matter
The 7-month window around your 65th birthday — when it opens, what to do in it, and why enrolling in the wrong month can delay your coverage.
Read the article →Turning 65? Start With Timing, Not Plans
If you are turning 65, it is easy to think the first Medicare task is plan comparison. Often it is not. Your first decision may be whether you need to enroll now, what other coverage you have, and what timing window you are in.
Read the article →Leaving Work Coverage? Medicare Decisions Can Change Quickly
Leaving employer coverage is one of the moments when Medicare decisions can become more urgent very quickly. COBRA, retiree coverage, and spouse coverage do not all work the same way when Medicare is involved.
Read the article →When to Sign Up for Medicare Around 65
Learn when to sign up for Medicare around age 65, what the 7-month window means, and why Medigap timing depends on when you start Part B.
Read the article →Medicare Annual Enrollment: Oct 15 to Dec 7
Medicare Annual Enrollment runs October 15 to December 7. See what can change, what to review, and how to avoid making a rushed decision.
Read the article →Medicare Advantage Open Enrollment: Jan 1 to Mar 31
Medicare Advantage Open Enrollment runs January 1 to March 31 for people already in Medicare Advantage. Learn what you can and cannot do in this window.
Read the article →New Plan Year, New Numbers: What to Recheck Before January
Medicare costs and plan details can reset each year. Learn what to recheck calmly before the new plan year begins.
Read the article →Still sorting through this?
Fern can help you organize what matters, what is unclear, and what still needs to be verified before you call, compare, renew, or decide.