High Quality Content by WIKIPEDIA articles! The Oklahoma Department of Mental Health and Substance Abuse Services (ODMHSAS) is an agency of the Government of Oklahoma responsible for providing public health services relating to mental illness and substance abuse. The Department is governed by the Board of Mental Health and Substance Abuse Services, composed of eleven members appointed by the Governor of Oklahoma with the approval of the Oklahoma Senate. The Board, in turn, appoints the Commissioner of Mental Health and Substance Abuse Services to serve as the chief executive officer of the Department.