Purpose: To determine the effectiveness of telephone motivational coaching delivered by veteran peers to improve mental health (MH) treatment engagement among veterans.Methods: Veterans receiving primary care from primarily rural VA community-based outpatient clinics were enrolled. Veterans not engaged in MH treatment screening positive for ≥1 MH problem(s) were randomized to receive veteran peer-delivered feedback on MH screen results and referrals plus 4 sessions of telephone motivational coaching (intervention) versus veteran peer-delivered MH results and referrals without motivational coaching (control). Blinded telephone assessments wereThis is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.