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.
Medicare Part A is also called hospital insurance, and it covers most of the cost of care when you are at a hospital or skilled nursing facility as an inpatient. Medicare Part A also covers hospice services. For most people over 65, Medicare Part A is free. The following list gives you an idea of what Medicare Part A pays for, and does not pay for, during your stay in a participating hospital. However, even when Part A covers a cost, there are significant financial limitations on the length of coverage, as you'll see below.