Medicare
/ˈmedɪker/
Definition 1 of 2
Pro Tip 1/3Age Requirement
Medicare in the U.S. is primarily for those aged 65 and older, emphasizing the age aspect of eligibility. 
When I turn 65, I'll be eligible for Medicare.
Pro Tip 2/3Disability Coverage
U.S. Medicare also covers people under 65 with certain disabilities, showing its broad support. 
He's enrolled in Medicare due to his disability.
Pro Tip 3/3Not Universal
Not all medical expenses may be covered by Medicare; it's frequent to have additional private insurance in the U.S. 
Medicare paid for the surgery, but not the rehabilitation.