In medical training, learners glean messages from the offhand comments, behaviors, and attitudes of their superiors, a phenomenon known as the hidden curriculum. Experts have described how the hidden curriculum often runs counter to a culture of safety and standards of equitable treatment. In this position statement, the American College of Physicians recommends that educators recognize and optimize the hidden curriculum in physician training through promoting an expectation of professionalism as a core value, empowering learners to raise concerns about safety, and modeling empathy, reflection, and discussion of positive and negative experiences in the training environment.