Post-hospitalization Care Transition Strategies for Patients with Substance Use Disorders: A Narrative Review and Taxonomy.

Hospitalizations represent important opportunities to engage individuals with substance use disorders (SUD) in treatment. For those who engage with SUD treatment in the hospital setting, tailored supports during post-discharge transitions to longitudinal care settings may improve care linkages, retention, and treatment outcomes. We updated a recent systematic review search on post-hospitalization SUD care transitions through a structured review of published literature from January 2020 through June 2023. We then added novel sources including a gray literature search and key informant interviews to develop a taxonomy of post-hospitalization care transition models for patients with SUD. Our updated literature search generated 956 abstracts not included in the original systematic review. We selected and reviewed 89 full-text articles, which yielded six new references added to 26 relevant articles from the original review. Our search of five gray literature sources yielded four additional references. Using a thematic analysis approach, we extracted themes from semi-structured interviews with 10 key informants. From these results, we constructed a taxonomy consisting of 10 unique SUD care transition models in three overarching domains (inpatient-focused, transitional, outpatient-focused). These models include (1) training and protocol implementation; (2) screening, brief intervention, and referral to treatment; (3) hospital-based interdisciplinary consult team; (4) continuity-enhanced interdisciplinary consult team; (5) peer navigation; (6) transitional care management; (7) outpatient in-reach; (8) post-discharge outreach; (9) incentivizing follow-up; and (10) bridge clinic. For each model, we describe design, scope, approach, and implementation strategies. Our taxonomy highlights emerging models of post-hospitalization care transitions for patients with SUD. An established taxonomy provides a framework for future research, implementation efforts, and policy in this understudied, but critically important, aspect of SUD care.