#1 Home Sleep Testing Provider in the U.S. Blackstone Medical Services is a privately held medical company primarily focused on servicing the sleep-disordered breathing market by providing "Home Sleep Testing" . Sleep apnea is a sleep disorder characterized by abnormal pauses in breathing or instances of abnormally low breathing, during sleep. Patients and Physicians now have a better choice in Home Sleep Testing. Blackstone is a provider for most major Insurance companies thought the country.