Buprenorphine (EBP) use data will be collected from November, 2012 to May, 2016 through administrative databases located at the state of Ohio. Participants will be followed for the duration of Buprenorphine use that is an average of 5-7 months. Organizational and Payer data will be collected from January, 2013 to January, 2015. The data from the study will be analyzed and reported during January 2015 to February 2017.