Key Words smoking, managed care, health improvement, tobacco use, insurance coverage s Abstract Health plans play an important role in tobacco control. In this chapter we present an overview of the scientific research on health plan involvement in clinical and community interventions regarding tobacco use. Also included are interventions that have been undertaken by health plans to lower smoking rates among their members and the general population. We conclude with a new model that can be used to engage health plans in tobacco control efforts and a case study that outlines how one health plan has implemented this new model.