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Home > Medicare eligibility and enrollment

Medicare eligibility and enrollment

When it comes to Original Medicare, your enrollment could be as uncomplicated as opening your mail and putting your Medicare card in your wallet. But there’s usually more to it than that.

For some Americans – specifically, those who are already receiving Social Security or Railroad Retirement Board benefits before turning 65 – the government automatically enrolls you in both Medicare Part A and Medicare Part B at age 65. But millions of Americans who are drawing closer to aging into Medicare eligibility have a long list of choices to make and some important deadlines to note.

This Enrollment section answers many of the questions that should be top of mind for prospective Medicare beneficiaries. But we also look at changes you can make – and when you can make them – if you’re already enrolled in Medicare coverage. Among the topics we cover:

Still have questions about enrollment? We have an entire section of frequently asked Medicare questions devoted to the topic.

2025 coverage: Medicare enrollment dates at a glance

Beyond your initial opportunity to enroll in Medicare plans, the federal government provides other windows for enrollment and plan changes each year.

Medicare Open Enrollment 2025 Guide

Our 2023 Medicare Open Enrollment Guide will walk you through sign-up dates, tips for choosing a plan, and more. Get the information you need today!

How do I enroll in Medicare?

Learn how and when to enroll in Original Medicare, Medicare Advantage, Medigap, and Part D coverage. Get plan information and a free quote today.

How do I change my Medicare coverage?

Thousands of Medicare beneficiaries change their coverage each year during several enrollment windows. Find out how and when you can switch plans.

2025 coverage: Medicare enrollment dates at a glance

Beyond your initial opportunity to enroll in Medicare plans, the federal government provides other windows for enrollment and plan changes each year.

Medicare Open Enrollment 2025 Guide

Our 2023 Medicare Open Enrollment Guide will walk you through sign-up dates, tips for choosing a plan, and more. Get the information you need today!

How do I enroll in Medicare?

Learn how and when to enroll in Original Medicare, Medicare Advantage, Medigap, and Part D coverage. Get plan information and a free quote today.

How do I change my Medicare coverage?

Thousands of Medicare beneficiaries change their coverage each year during several enrollment windows. Find out how and when you can switch plans.

See more articles

Medicare eligibility and enrollment

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2025 coverage: Medicare enrollment dates at a glance

Medicare Open Enrollment 2025 Guide

How do I enroll in Medicare?

How do I change my Medicare coverage?

2025 coverage: Medicare enrollment dates at a glance

Medicare Open Enrollment 2025 Guide

How do I enroll in Medicare?

How do I change my Medicare coverage?