Unintentionally retained surgical items (RSI) can have a devastating impact on patient health and safety. One method to reduce the incidence of RSI is radiofrequency (RF) detection. Nearly one million operations in New York state were analyzed for the rate of RSI before and after the use of RF was required and simultaneous TeamSTEPPS training was provided. The incidence of RF-detectable items was significantly reduced, but the rate of non-RF-detectable items was not.