IntroductionMulti-level and cross-context implementation strategies are needed to support health systems, healthcare delivery organizations, and providers to adopt evidence-based practice (EBP) for substance use disorder (SUD) treatment. However, misalignment between state oversight agencies and healthcare organizations about which services to prioritize and which outcomes are reasonable to expect can hinder implementation success and widespread access to high-quality care. This study investigated the utility of the Leadership and Organizational Change for Implementation-System Level (LOCI-SL) strategy for supporting statewide EBP implementation for SUD treatment. MethodsNine community mental health centers (CMHCs) contracted by a state agency participated in a combined motivational-enhancement therapy and cognitive behavioral therapy (MET/CBT) implementation effort. Five of the CMHCs also received the LOCI-SL strategy to obtain ongoing implementation support. We conducted 21 individual interviews and three small group interviews with 30 participants across CMHCs and state health agencies to investigate the utility of LOCI-SL in supporting their EBP implementation efforts. Deductive thematic analysis was guided by the Exploration, Preparation, Implementation, Sustainment Framework. ResultsFive themes described CMHCs' LOCI-SL and broader contextual experiences implementing EBPs: (1) LOCI-SL supported executives in Preparation phase activities that holistically considered organizational needs and capacity to implement and sustain EBPs; (2) LOCI-SL facilitated trust and communication processes across Preparation, Implementation, and Sustainment phases to improve EBP uptake; (3) LOCI-SL increased CMHCs' use of implementation climate strengthening activities throughout the Implementation phase; (4) state contracts did not emphasize quality and thus were not sufficient bridging factors to enforce EBP fidelity during Implementation; and, (5) limited funding and low Medicaid reimbursement rates hindered EBP use throughout the Implementation and Sustainment phases. ConclusionsLOCI-SL was viewed as a favorable and useful implementation strategy for supporting statewide adoption of EBPs. However, outer context barriers, including limited financial investments in the treatment system, impeded implementation and sustainment efforts. While previous research suggests that contracts are viable alignment-promoting bridging factors, this study demonstrates the importance of articulating implementation outcome expectations to aid state-contracted organizations in achieving EBP implementation success. This study also highlights the need for multi-level implementation strategies to effectively align implementation expectations between outer- and inner-context entities.