Medicare Enrollment
Timeline Calculator
Your Initial Enrollment Period is a 7-month window: the 3 months before your 65th-birthday month, that month, and the 3 months after. Enter your birthday — plus whether you have employer coverage, SSDI, or ESRD — to see your exact dates on a visual timeline.
Turning 65? Your Initial Enrollment Period is a 7-month window: the 3 months before your birthday month, that month, and the 3 months after. Enter your details below to see your exact dates on a visual timeline.
Your Exact IEP Dates
See the precise 7-month Initial Enrollment Period around your 65th birthday.
Employer Coverage?
We check whether a penalty-free Special Enrollment Period applies to you.
Avoid Late Penalties
Miss your window and you could face a lifetime Part B late-enrollment penalty.
We're Here to Help
Get local, personalized help understanding your options and deadlines.
Your Initial Enrollment Period
Enter your details to see an estimate.
Your Medicare timeline
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Initial Enrollment Begins
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3 months before your birthday month
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Birthday Month
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You turn 65 — Medicare eligibility
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Initial Enrollment Ends
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3 months after your birthday month
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Annual Enrollment Period
Oct 15 – Dec 7
Every year — join, switch, or drop a plan
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General Enrollment Period
Jan 1 – Mar 31
For those who missed their IEP
Because you have employer coverage
- Active coverage: a Special Enrollment Period applies while you (or a spouse) have active coverage from current employment.
- SEP window: you can usually sign up for Part B without a penalty during that employment and for up to 8 months after it ends.
- 20+ employee rule: if the employer has 20 or more employees, the group plan is primary and you may safely delay Part B.
- HSA note: contributing to a Health Savings Account after enrolling in Medicare can create tax issues — review this before you enroll.
Want to plan the whole thing? See our enrollment periods overview, or call and we’ll map your dates with you.
Frequently Asked Questions
When should I enroll to avoid a gap?
What if I miss my Initial Enrollment Period?
Can I delay Part B?
What is a Special Enrollment Period?
Sources
- When does Medicare coverage start — Medicare.gov
Talk to a local, licensed agent
Rocco DeLuca can walk you through your options — free, no pressure.