The 4th Visual Analytics in Healthcare (VAHC) Workshop was held this weekend in Washington, DC. This year’s event, which I co-chaired with Dr. Jesus Caban (NICoE, Walter Reed Medical Center), was held in conjunction with AMIA’s 2013 Annual Symposium. Over 100 attendees turned out for the workshop which included technical papers, posters, interactive demonstrations, and two keynotes: (1) Prof. Ben Shneiderman of the University of Maryland, and (2) Dr. Howard Wainer, a statistician and Distinguished Research Scientist at the National Board of Medical Examiners.