Medicare is a health insurance program primarily aimed at people aged 65 or older. To be eligible, in addition to meeting the age requirement, you must have accumulated at least 40 credits on your tax returns (which is approximately 10 years of filings)
Another way to qualify for Medicare is if you have a disability, but it must be certified by a physician in order to be eligible. The decision in these cases is made directly by the Medicare office and the Social Security office