Guide to Medicare Enrollment Periods and Deadlines

This comprehensive hub walks you through every Medicare enrollment period, helping you understand key deadlines, avoid penalties, and maintain continuous coverage with confidence. Missing a Medicare enrollment deadline can lead to lasting financial consequences. Late enrollment penalties often increase your monthly premiums and, in many cases, continue for as long as you have coverage. 

When can I enroll in Medicare?

right time to enroll in a Medicare plan depends on your age, current employer coverage, and whether you’ve experienced a qualifying life event like moving or losing your health insurance. Download our Initial Enrollment Period checklist to find your exact window.

Explore Our Medicare Enrollment Resources

• Initial Enrollment Period (IEP): The seven-month window around your 65th birthday(three months before, the month of, and three months after) when you can first enroll in Medicare.

• General Enrollment Period (GEP): A yearly period from January 1 to March 31 when people who missed their IEP can sign up for Medicare, with possible late penalties.

• Annual Enrollment Period (AEP): The yearly window from October 15 to December 7 when beneficiaries can join, switch, or drop Medicare Advantage or Part D plans.

• Special Enrollment Periods (SEP): Designated times outside standard enrollment periods when certain life events (like moving or losing other coverage) allow you to make changes to your Medicare coverage.

• Medicare Advantage Open Enrollment (OEP): A period from January 1 to March 31 when individuals already in a Medicare Advantage plan can switch plans or return to Original Medicare.
  

Frequently Asked Medicare Enrollment Topics 

Explore Our Medicare Enrollment Periods Guide

When to Sign Up for Medicare Quiz

Medicare Enrollment Deadlines 2026

Turning 65 Medicare Checklist

Do I Automatically Get Medicare?

Avoiding Late Enrollment Penalties

Missed the Medicare Enrollment Deadline?

Comparing Medicare Advantage vs. Supplement

Medicare Enrollment Periods FAQs

Take the Stress Out of Medicare Deadlines

Medicare enrollment timelines can feel overwhelming, but you don’t have to figure them out alone. At SelectQuote, we have over 40 years of experience helping people navigate decisions about insurance coverage. We turn confusing deadlines into clear, simple next steps, so you can enroll with confidence and avoid costly penalties.

• Deadline Experts: Our licensed insurance agents understand the ins and outs of Medicare enrollment timelines and can help make sure you enroll within the correct window, avoiding guesswork and the risk of late penalties.

• The "One-Call" Solution: Instead of spending hours researching deadlines and plan options, a single call connects you with a licensed insurance agent who can quickly compare plans from highly rated carriers on your behalf.

• Real Stories: A SelectQuote customer shared: "I feel very comfortable in knowing that my agent, who understands my needs, will call me every year to reassess and recommend the best plan for the upcoming year.”

• Trusted Authority: With an A+ rating from the Better Business Bureau and over 60 million* people served, we’ve earned a reputation for making Medicare enrollment simple and stress-free.

*From 1985-2025, SelectQuote helped 61,292,307 unique individuals review their current insurance (life insurance, Medicare Advantage, final expense, auto insurance, and/or home insurance) coverage and/or compare options available to them, with a call time of at least 2 minutes. | Full disclaimer at selectquote.com/disclosures