Medicare Enrollment Checklist: Documents and Steps You Need
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Do I Automatically Get Medicare at 65? What You Need to Know in 2026
Last Modified: 10/05/2026 | Reviewed by Keith Armbrecht (NPN 634015)
Quick Summary
You may be automatically enrolled in Medicare Part A and Part B at 65 if you’re already receiving Social Security or certain Railroad Retirement Board benefits before you become eligible.
If you’re not receiving Social Security benefits, Medicare enrollment generally isn’t automatic and you may need to actively sign up through Social Security.
Don’t assume a Medicare card will simply arrive because you’re turning 65.
Key Facts
- Medicare enrollment isn’t automatic for everyone.
- People already receiving Social Security benefits sufficiently before 65 are generally automatically enrolled in Part A and Part B.
- Medicare typically sends automatically enrolled beneficiaries a welcome package and Medicare card before coverage starts.
- If you’re not receiving Social Security, you generally need to enroll yourself.
- You don’t have to start Social Security retirement benefits just to enroll in Medicare.
- You can enroll in Medicare through Social Security.
- Your Initial Enrollment Period generally lasts seven months.
- People still working may be able to delay Part B under certain circumstances.
- Part B has a monthly premium.
- Improperly delaying Part B can lead to penalties.
- HSA contributors need to pay particular attention to Medicare effective dates.
Who Needs to Sign Up?
If you’re approaching 65 and aren’t receiving Social Security benefits, don’t assume you’re enrolled.
You can enroll in Medicare without beginning Social Security retirement benefits.
Social Security handles enrollment in Medicare Part A and Part B.
What If I’m Still Working?
This is where the answer becomes more individual.
If you have employer group coverage based on current employment, you may be able to delay Part B.
But don’t simply decline Part B without first determining whether your employer coverage qualifies and how it coordinates with Medicare.
Video Explanation from Keith
Turning 65: Will Medicare Automatically Start?
Keith's Take
This catches a lot of people.
They know Medicare generally starts at 65, so they assume Medicare automatically knows they want coverage and a card will show up.
That isn’t always what happens.
If you’re already receiving Social Security, automatic enrollment may take care of it.
If you’ve delayed Social Security—which many people now do—you may need to take action yourself.
I recommend figuring this out several months before your 65th birthday, not the week before you need coverage.
Keith Armbrecht
Medicare on Video
Frequently Asked Questions About Automatic Medicare Enrollment
Q. Does everyone automatically get Medicare at 65?
A. No.
Q. Who is automatically enrolled?
A. People already receiving qualifying Social Security benefits before turning 65 are generally automatically enrolled in Original Medicare.
Q. What if I haven't started Social Security?
A. You generally need to sign up for Medicare yourself.
Q. Do I have to claim Social Security to get Medicare?
A. No. You can enroll in Medicare without starting Social Security retirement benefits.
Q. When should I sign up?
A. Your Initial Enrollment Period generally starts three months before your 65th-birthday month.
Q. How do I sign up?
A. Medicare Part A and Part B enrollment is handled through the Social Security Administration.
Q. What happens if I'm automatically enrolled but still working?
A. Don't automatically cancel or keep Part B without checking how your employer coverage coordinates with Medicare.
Q. Can I decline Part B?
A. Because Part B requires a premium, automatically enrolled people can decline it, but doing so without qualifying other coverage can potentially create a future coverage gap or late enrollment penalty.
Q. When should my Medicare card arrive if I'm automatically enrolled?
A. Medicare says the welcome package containing the Medicare card is generally mailed about three months before Medicare coverage begins.
Official Government Sources
Explore Related Guides
Medicare Effective Dates: When Does Your Coverage Start?
Your Medicare effective date depends on when you enroll and which Medicare enrollment period you’re using.
Explore Related Guides
Turning 65?
Medicare on Video can help you understand what you need to do and compare the Medicare options we offer.
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Medicare currently states that people receiving Social Security benefits at least four months before turning 65 are automatically enrolled in Parts A and B, while SSA tells people not receiving Social Security to enroll themselves, preferably starting three months before 65 when they need coverage at 65.