DC_Studio/Envato Moneywise and Yahoo Finance LLC may earn commission or revenue through links in the content below. Turning 65 in the U.S. means finally being able to rely on Medicare covering most of your health expenses. But before you join the 67 million Americans enrolled in this program, it’s important to understand what’s covered and what’s not. If you have already been receiving Social Security benefits for at least four months when you turn 65, you’ll automatically be enrolled for Medicare Part ...