VirtuOx HST is a home sleep testing program that can diagnose patients with central or obstructive sleep apnea. It uses level III and level IV devices. We mail these devices to and from the patient’s home. Our respiratory therapist scores the study and board certified sleep physicians interpret the results, which are sent to the DME and the treating physician. The devices are owned by VirtuOx and all associated costs are incurred by VirtuOx.