Multisite Mobile Addiction Services: Four-Year Outcomes.

First launched in Boston, MA in January 2018, Community Care in Reach® is a mobile addiction model that uses mobile clinics to deliver harm reduction and clinical services to people at high risk of drug-related morbidity and mortality and who are unhoused or at risk of losing housing. Through a public/private partnership, the model has grown to include six programs across Massachusetts. Using the RE-AIM framework, this initial, descriptive evaluation for this multisite project included quantitative and qualitative methods to give insight into reach and performance. From 1 January 2022 to 30 June 2024, there were 17,887 harm reduction encounters and 16,117 clinical encounters providing care to 4645 individuals. Buprenorphine-based treatment (a key medication for opioid use disorder) was initiated among 1227 individuals, of whom 15% remained in buprenorphine-based treatment after 180 days. Evaluation across multiple organizations posed unique challenges; however, results demonstrated universal engagement of hard-to-reach individuals.