Your Initial Enrollment Period, Explained Simply
The 7-month window around your 65th birthday is your Initial Enrollment Period. Missing it can mean penalties. Here's how it works.
Your Initial Enrollment Period (IEP) is the seven-month window when you can first sign up for Medicare. It begins three months before the month you turn 65, includes your birthday month, and ends three months after.
If you enroll during the first three months of your IEP, coverage typically starts the month before your birthday month. If you enroll during your birthday month or later, coverage may start later.
If you're still working and covered by an employer group health plan, you may qualify for a Special Enrollment Period that lets you delay Part B without penalty. When that coverage ends, you have eight months to sign up.
Missing your IEP without other coverage can lead to lifetime late-enrollment penalties added to your Part B and Part D premiums. Understanding your timing is one of the most important parts of Medicare planning.
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Educational notice: This website provides general Medicare information for educational purposes only. It does not guarantee any savings, benefits, or coverage, and is not a substitute for personalized advice. We do not represent that any specific beneficiary will receive the same benefits. For individualized guidance, request a consultation.