Healthcare coalitions can use comparative data from the National Health Security Preparedness Index, combined with insights from behavioral economics, to strengthen community engagement and investment in coalition activities. Using Index results, we demonstrate how organizational preparedness and individual behavior interact at the systems-level to produce unique strengths and vulnerabilities in health security for individual states and communities. Strategic use of comparative data can nudge stakeholders toward greater cooperative behavior and stronger coalition engagement. This session illustrates specific tools and approaches for data-driven coalition nudging.