Primary care physicians (PCPs) frequently have long-term relationships with patients as well as their families. As such they are well positioned to care for their patients at the end of their lives. As the number of patients in need of end-of-life care continues to grow, it is critical to understand how PCPs can fulfill that need. The purpose of our study is to perform a narrative review of the literature and develop a theoretical model delineating the overarching roles played by PCPs in caring for patients at the end of life.For this narrative review, the authors searched Medline (PubMed), Embase, Cochrane Library, and Scopus up to March 22, 2017. Articles were not limited by geography.Review of existing literature generally supports 4 broad categories as the primary roles for PCP involvement in end of life: pain and symptom management; information management, including transmitting and clarifying information, setting care priorities, and assisting patients with treatment decisions; coordinating care and collaborating with other providers; and addressing patients' social, emotional, and spiritual needs.Based on the results of this review, PCPs provide a wide range of services to patients at the end of life. Promoting the provision of the full scope of services by PCPs will help ensure improved continuity of care while providing the highest quality of care for patients, both in the United States and around the world.