<p><strong>PURPOSE: </strong>Despite American Academy of Pediatrics recommendations that adolescents receive healthcare transition (HCT) services starting at age 12, few do. Electronic health record-based clinical decision support (CDS) tools are effective at promoting healthcare provider adherence to clinical guidelines. This study's purpose was to increase provider HCT services engagement through implementation of a transition-specific CDS and participation in a transition-focused Learning Collaborative (LC).</p>

<p><strong>DESIGN AND METHODS: </strong>Three pediatric primary care sites of an urban, academic medical center implemented a transition CDS tool for ≥14-year-olds. Previously, one site had a version for ≥16-year-olds. Two sites participated in a LC with Plan-Do-Study-Act cycles targeting HCT services engagement, measured by CDS use and practice-level guideline implementation.</p>

<p><strong>RESULTS: </strong>From July 2018 through June 2019, providers at LC-participating sites engaged in HCT services at 8.0% (n&nbsp;=&nbsp;480) and 5.3% (n&nbsp;=&nbsp;145) of eligible patient visits compared to the control's 3.1% (n&nbsp;=&nbsp;69). Engagement was highest for ≥18-year-olds at the LC-participating sites, 26.0% (n&nbsp;=&nbsp;263) and 12.0% (n&nbsp;=&nbsp;80), compared to the control's 7.2% (n&nbsp;=&nbsp;31). After expanding from ≥16 to ≥14-year-olds, engagement decreased by 9.5% at ≥16-year-old visits. LC-participating sites reported increased HCT guideline adherence.</p>

<p><strong>CONCLUSIONS: </strong>Implementation of a transition-specific CDS with LC participation increased provider HCT services engagement and practice-level guideline implementation. Expansion to younger adolescents contributed to decreased engagement for older patients. Future research should assess opportunities to improve uptake and patient outcomes of transition CDS engagement.</p>

<p><strong>PRACTICE IMPLICATIONS: </strong>Quality improvement activities and transition clinical decision supports can improve provider engagement in recommended transition services for adolescents and young adults.</p>