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.
Together with Medicare Part B, it makes up what is known as Original Medicare, the federally administered health-care program. Medicare Part A helps pay for the cost of inpatient hospital care, while Part B covers outpatient medical services. What does Medicare Part A cover? Medicare Part A (hospital insurance) helps cover a variety of services, including the following: Inpatient hospital care: May include semi-private rooms, meals, nursing services, and prescription drugs needed for your treatment.