When we use a negative construction (with not) in the main clause, until means 'not before'. I won't (will not) start cooking until you come home. until three kilometres.
Medicare Part A is hospital insurance that covers inpatient hospital care and certain home care. Medicare Part A is usually free if you or your spouse paid Medicare taxes while working. If not, it can cost up to $413 each month in 2017. Hospital and skilled nursing facility stays come with deductibles and co-insurance.
What does it pay for? Medicare Part A (Hospital Insurance) benefits, like inpatient hospital care, skilled nursing facility care, home health care, and hospice care Medicare Program administration, like costs for paying benefits, collecting Medicare taxes, and combating fraud and abuse