Entrustable professional activities: making sense of the emergency medicine milestones.

Background: The Next Accreditation System (NAS) is being implemented by the Accreditation Council for Graduate Medical Education with seven specialties, including Emergency Medicine (EM), which began in July 2013. The NAS represents a more structured method of accreditation, with dependence on outcomes and less emphasis on educational process. A key component of the NAS is the individual resident semiannual reporting of the Milestone proficiency levels for all sub-competencies, which are more specific areas of domain for the general competencies.