Effective collaboration within and across multidisciplinary cancer care teams is essential for ensuring high-quality patient outcomes. Despite its importance, little was understood about the teamwork competencies necessary to coordinate cancer care within a multiteam system prior to our study. In our Lightning Talk, we will define the concept of a multiteam system and describe challenges inherent in navigating interdisciplinary collaboration and care coordination within the complex cancer care delivery system. We will describe our study methodology for identifying core teamwork competencies…