This is a cluster-randomized controlled trial designed to increase the availability of buprenorphine and extended-release naltrexone treatment capacity for opioid use disorder (OUD). The intervention being tested is a bundle of OUD pharmacotherapy capacity building practices called the Prescriber Recruitment Bundle (PRB). For the study, 70 organizations will be identified and recruited, and those organizations will then be randomized into one of two arms: 1) control, and 2) intervention: organizations implementing the PRB using the Network for Improvement of Addiction Treatment (NIATx) Organizational Change Model. The primary research question is to test the impact of the PRB, relative to the control, on increasing buprenorphine treatment slots and extended-release naltrexone capacity and the number of patients receiving these pharmacotherapies.