Medicare Enrollment Checklist: Documents and Steps You Need
Starting Medicare is easier when you know which enrollment period applies, when your current insurance ends, and what information Social Security may need.
Still Working at 65: Do You Need Medicare in 2026?
Last Modified: 10/05/2026 | Reviewed by Keith Armbrecht (NPN 634015)
Quick Summary
You don’t necessarily need to enroll in Medicare Part B at 65 if you or your spouse are still actively working and you have qualifying employer group health coverage.
However, the correct answer depends on the type of employer coverage you have, the size and rules of the employer plan, whether you’re contributing to an HSA, and whether the coverage is based on current employment.
Don’t automatically delay Medicare just because you have insurance.
Key Facts
- Medicare eligibility generally begins around age 65.
- You may be able to delay Part B with qualifying active employer coverage.
- Coverage based on current employmentis especially important.
- COBRA isn’t treated the same as active-employer coverage for the Part B Special Enrollment Period.
- Retiree coverage may require Medicare.
- Marketplace coverage doesn’t generally provide the same Part B delay protection as qualifying employer coverage.
- You may be able to enroll in premium-free Part A while still working.
- HSA contributions create an important Medicare timing issue.
- Your Part B Special Enrollment Period can generally last 8 monthsafter employment or qualifying employer coverage ends.
- Always verify coordination rules with the employer benefits administrator.
Do You Need Part A at 65?
If you qualify for premium-free Part A, you may choose to enroll at 65 even if you’re working.
However, people contributing to a Health Savings Account need to be very careful because Medicare enrollment affects HSA contribution eligibility.
Do You Need Part B at 65?
You may be able to delay Part B if you have qualifying group health coverage based on your or your spouse’s current employment.
But confirm how your employer coverage coordinates with Medicare before delaying Part B.
The HSA Warning
Medicare advises people with HSAs to plan carefully because Medicare Part A can be retroactive when someone enrolls after age 65.
Continuing HSA contributions after Medicare coverage becomes effective can create tax problems.
Video Explanation from Keith
Age 65 and Still Working — Do You Need Medicare?
Keith's Take
This is one of the situations where I don’t want someone taking generic Medicare advice.
I want four answers:
Are you still actively working?
How many employees does the employer have?
Is the coverage based on current employment?
Are you contributing to an HSA?
Those answers can completely change what you should do.
Keith Armbrecht
Medicare on Video
Frequently Asked Questions
Q. Must I enroll in Medicare at 65 if I'm still working?
A. Not necessarily.
Q. Can I delay Part B?
A. Potentially, if you have qualifying group coverage from current employment.
Q. Can I use COBRA instead of Part B?
A. Be careful. Your Part B Special Enrollment Period generally begins when active employment or qualifying coverage ends, even if you elect COBRA.
Q. What about retiree insurance?
A. Retiree insurance may require you to have Medicare Parts A and B.
Q. Retiree insurance may require you to have Medicare Parts A and B.
A. Generally 8 months after current employment or qualifying employer coverage ends, whichever occurs first.
Q. Can I keep contributing to my HSA after Medicare starts?
A. Generally no. Medicare enrollment affects eligibility to contribute to an HSA.
Official Government Sources
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