The link between hours worked, hours slept, and medical errors has been the topic of much research, policy, and debate. This study captured sleep timing, regularity, efficiency, and duration via Fitbit in more than 3,500 interns (i.e., first year medical residents). There was no association between sleep duration and self-reported medical errors or burnout. Interns with the worst sleep health did have higher rates of burnout, compared to those with the best; however, as a group, interns had poor sleep health.