Health information technology (IT) has had a profound impact on health care. Although health IT has led to efficiency gains and improved safety, unintended consequences remain a concern. In this systematic review, researchers analyzed 69 studies from 2001 through 2012 that examined the use of health IT in a clinical setting and its effect on safety outcomes for patients. About one-third of the studies demonstrated a positive impact of health IT on patient safety outcomes, but many of these focused on the hospital setting, involved a single institution, and looked at decision support or computerized provider order entry. The authors suggest that future studies should focus on other areas in which the impact of health IT remains understudied, such as in outpatient and long-term care settings, and they underscore the need for higher quality research. A recent WebM&M commentary described the unintended consequences of health IT.