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 benefits are divided into two parts. Part A primarily covers inpatient hospital, skilled nursing facility care and home health care. Once enrolled in Medicare, you will receive these benefits automatically and do not pay premiums for them (you've already paid for them through your taxes).