Our projects will address several gaps in our understanding of the issues related to implementation of VTE prophylaxis in hospitalized patients. We aim to identify subgroups in the hospitalized population that are at especially high risk for VTE. An improved and novel automated electronic alerting system will facilitate this identification. Our new alert system will be much more rigorous than our prior protocol. The new alert will have three sequential screens rather than the single alert screen that we had in the prior version.