This document profiles "e-Patient Dave" deBronkart, a patient engagement advocate. It summarizes his journey from a marketing career to becoming a full-time patient advocate after being diagnosed with cancer in 2007. It describes how he utilized online resources and patient communities to help make treatment decisions and find an effective immunotherapy. The document advocates for greater patient empowerment and participation in healthcare, citing examples of highly engaged "e-patients" who are helping to advance medicine through open data sharing and DIY medical innovations.