Working at 65
Still working at 65? Here's how Medicare fits in.
Turning 65 doesn't always mean you need to enroll in Medicare right away — but the right choice depends on your employer coverage.
Quick Answer
Group health coverage based on your or your spouse's current employment may let you delay Part B. Confirm payment order before deciding. If you qualify, the Part B Special Enrollment Period generally lasts 8 months after employment or that coverage ends, whichever happens first. COBRA does not extend this window; Part D has separate rules.
Employer size matters
A common rule of thumb: if your employer has 20 or more employees and you have group health coverage through that employer (or a spouse's employer), you generally have the option to delay Medicare Part B without a late enrollment penalty, since you'd qualify for a Special Enrollment Period later.
If your employer has fewer than 20 employees, Medicare often becomes the primary payer, and delaying enrollment can leave gaps in coverage — this is a conversation worth having with your HR department and a licensed insurance agent.
What is "creditable coverage"?
For Part D, creditable prescription drug coverage is expected to pay, on average, at least as much as standard Medicare drug coverage. Maintaining it can help avoid the Part D late enrollment penalty. It does not by itself let you delay Part B.
Ask your employer's benefits administrator for a "creditable coverage" notice each year — it describes the prescription drug coverage's status for Part D, not Part B eligibility. If you're weighing employer coverage against Medicare options, see how Medicare Advantage compares to Medigap.
Why this matters: confirm Part B and Part D deadlines separately before delaying enrollment. Our Penalties page explains the different penalties. For official guidance, see Medicare.gov: Working Past 65,Creditable Drug Coverage, or the Social Security Administration.
Frequently Asked Questions
Can I delay Medicare if I'm still working at 65?
Group health coverage based on your or your spouse's current employment may qualify you for a Part B Special Enrollment Period. Confirm how the plan pays before delaying. Creditable prescription drug coverage is a separate Part D rule.
What is "creditable coverage"?
For Part D, prescription drug coverage expected to pay, on average, at least as much as standard Medicare drug coverage is creditable. It can protect against a Part D late enrollment penalty, but does not by itself establish a Part B enrollment exception.
Do I need to enroll in Medicare if I still have employer coverage?
It depends on current-employment group health coverage and how your plan coordinates with Medicare. For people 65 or older, Medicare generally pays first when the employer has fewer than 20 employees. Confirm payment order and enrollment requirements with the benefits administrator.
What happens when I eventually leave my job or lose employer coverage?
If you qualify for the employment-based Part B Special Enrollment Period, it generally lasts 8 months after employment or group health coverage ends, whichever happens first. COBRA and retiree coverage do not extend it. Part D has separate enrollment dates.
Weighing Medicare against employer coverage? Take the Medicare Decision Style Quiz orschedule a consultation with a licensed insurance agent.
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