 Sustainability is defined as the ability of a program, clinical intervention, or implementation strategy to continue to be delivered and or individual behavior change, either by the individual, clinicians, or patients, is maintained over a specified period of time, with the program and individual behavior change potentially evolving or adapting while continuing to produce beneficial outcomes for individuals and systems. This article was authored by Julia E. Moore, Alikia Moscoranius, Julie Bain, and others.