Graymark Healthcare, Inc. provides care management solutions to the sleep disorder market based on various independent sleep care centers and hospital sleep diagnostic programs operated in the United States. It offers diagnostic sleep testing services and care management solutions for people with chronic sleep disorders. The company also sells equipment and related supplies and components used to treat sleep disorders. Its products and services are used primarily by patients with obstructive sleep apnea. As of March 15, 2013, the company operated 20 independent sleep care centers and 81 hospital sleep diagnostic programs. Graymark Healthcare, Inc. is headquartered in Oklahoma City, Oklahoma.