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.
The original Medicare offers the same benefits as private insurance, but at a lower out-of-pocket cost. It includes Parts A and B. Part A is hospital insurance coverage, and it pays for hospital expenses, such as inpatient hospital stays, hospice and skilled nursing care.