Millions of people currently live with one or more serious illnesses such as cancer, heart, lung, or kidney disease. Serious illness knows no age limits and affects those from the preborn to those of advanced age. The number of community-based programs to provide care to those facing serious illness have grown significantly, but the quality of care provided is not consistent across geographic locations or care settings. To ensure the best care for all people living with serious illness, it is important to implement quality measures in a way that will hold providers accountable for the delivery of high-quality care.