This Project Grant award, provided by the Agency for Healthcare Research and Quality (AHRQ) under the Research on Healthcare Costs, Quality and Outcomes (CFDA 93.226) program, is funding a $500,000 research project led by Brigham & Women's Hospital. The project aims to leverage electronic health record (EHR) data and stakeholder expertise to gain a deeper understanding of risk factors, disparities, and outcomes related to delayed or missed diagnoses of venous thromboembolism (VTE) in both ambulatory and urgent care settings. The researchers will develop advanced data-driven tools, including artificial intelligence and statistical models, to identify vulnerabilities in VTE diagnostic workflows and inform strategies to improve diagnostic accuracy and equity. This 4-year project will utilize data from over 220 primary care and urgent care practices associated with 13 hospitals across urban, metropolitan, and rural locations in the Northeast and South. A sub-award of $131,607 was provided to the University of Alabama at Birmingham to support the development of data science approaches for identifying VTE diagnostic error risk factors and generating expert-informed prevention recommendations.