Can I Enroll in Medicare If I’m Not Retired?
Most Americans can enroll in Medicare Parts A and B at age 65, regardless of whether they're still working or not. However, many workers with employer health benefits may not need to. Here's a quick guide to determine if you'll need to sign up for Medicare at 65, or if your other health insurance is sufficient until you retire.
If you qualify based on your, or your spouse's, work history, you can sign up for Medicare when you turn 65, regardless of whether or not you've retired. (Note: If you aren't sure if you qualify, check your latest Social Security statement. It can tell you if you've earned enough "credits.")
In fact, if you've already signed up for Social Security benefits, you'll be automatically enrolled in Medicare Parts A and B starting in the month of your 65th birthday. If you haven't, you'll need to apply for Medicare, which you can do on the Social Security Administration's website in just a few minutes.
Source: Fool.com