Either single payer, or
Medicare for all, or
Free market, which means you'll buy insurance like you buy a cell contract that fits your needs, lifetime limits, coverage limits, all that for a price, etc.
Medicaid has to stay in place, though, for those who cannot afford to buy healthcare coverage, but EVERYONE MUST HAVE HEALTHCARE COVERAGE OR WE'LL BE PAYING FOR THEM TOO, AS IT HAS BEEN IN HISTORY. We can't have people with no health insurance in emergency rooms.