“…Information regarding buprenorphine waivers is maintained in the Drug Enforcement Agency's Controlled Substances Act (CSA) Registrants database. In the fi rst year after FDA approval, about 2,000 physicians applied for the buprenorphine waiver (Kissin et al, 2006), which had increased to more than 20,000 physicians holding the waiver by 2011 (Stein et al, 2015).…”