Unprofessional and disruptive behavior can erode patient safety and safety culture. The Coworker Observation System (CORS), a peer-to-peer feedback program previously used with physicians and advance practice providers, was implemented for use with nurses in three hospitals. Reports of unprofessional behavior submitted to the internal reporting system were evaluated by the CORS team, and peer-to-peer feedback was given to the recipient. This pilot study demonstrated that the implementation bundle can be successful with nursing staff.