Diagnostic error is an ongoing patient safety challenge that can result in patient harm. This literature review identified a set of emergency department (ED)-focused electronic health record (EHR) triggers (e.g., death following ED visit, change in treating service after admission, unscheduled return to the ED resulting in admission) and non-EHR based signals (e.g., patient complaints, referral to risk management) with the potential to screen ED visits for diagnostic safety events.