Moss, named CEO in 2018, has championed the push toward a model of value-based children’s care that addresses social determinants of health, such as food insecurity, transportation and internet access. The focus is part of a five-year strategic plan, begun in 2021, at the organization’s two hospitals and network of 72 primary- and specialty-care practices across five states. At the end of 2021, Nemours Children's Health recorded a 13% drop in avoidable emergency visits for patients enrolled in care management programs. The system achieved and exceeded value-based targets across seven contracts that year. Moss is also leading efforts to eliminate barriers to care in medically underserved areas through the recently opened Ginsburg Institute for Health Equity. Before taking the top job at Nemours Children's, he was surgeon-in-chief at Nationwide Children’s Hospital for seven years.