Via NBC News:
The non-partisan factcheck.org found that to be an exaggeration; while repeal of ACA would mean the earlier exhaustion of the part of Medicare that covers hospitals, the fund would still collect payroll taxes to cover the vast majority of hospital bills.
The Washington Post put it more bluntly: "This is wrong," it wrote on Sept. 6 of Biden's 2016 Medicare solvency claim.
On Saturday, Biden also accused Republican vice presidential nominee Paul Ryanof proposing to turn the federal health insurance program for seniors into "Vouchercare," saying that the Romney-Ryan plan would raise costs for seniors.
Independent fact checkers have pointed out that while Ryan's most recent budget would provide private insurance vouchers which would grow at the rate of inflation rather than at the rate of health costs, it would also keep traditional Medicare as an option for seniors who wanted it. While most agree that it's likely that seniors would have to pay more if they chose Medicare, it's hard to project how health care costs would change under a hypothetical Romney-Ryan plan.