Non-urgent use of the Emergency Department (ED) among children has been a major concern for the United States healthcare system for decades. Despite parents’ best intentions to obtain healthcare services for their sick or injured child, there are a number of consequences that stem from children being seen in the ED for non-urgent conditions better suited for less acute settings. These consequences include increased costs for both families and the healthcare system, reductions in quality of care for patients in the ED, and potentially long-term health issues for the children obtaining non-urgent ED care. Researchers have identified several factors that contribute to parents’ decisions to seek non-urgent care in the ED. Of these factors, parents’ perceiving the child’s condition as urgent is one of the most commonly cited contributors to non-urgent pediatric ED use. However, there is limited understanding of the specific conditions are responsible for non-urgent pediatric ED visits, and which of these conditions’ parents tend to perceive as urgent. Therefore, the purpose of this dissertation is to characterize the conditions that constitute non-urgent ED visits and parents’ perceptions of the severity of these conditions. By identifying these conditions responsible for non-urgent pediatric ED use, as well as parents’ perceptions of these conditions this dissertation serves as a foundation for future research and interventions. In turn, these efforts can be targeted towards reducing non-urgent pediatric ED visits and the consequences associated with them, while also ensuring that children receive high-quality care that is both cost and time efficient.