In recognition of the substantial challenges to developing effective lung cancer screening programs in clinical practice, the National Academies of Sciences, Engineering, and Medicine held a workshop in June 2016. At the workshop, experts described the current evidence base for lung cancer screening, the current challenges of implementation, and opportunities to overcome them. Workshop participants also explored capacity and access issues; best practices for screening programs; assessment of patient outcomes, quality, and value in lung cancer screening; and research needs that could improve implementation efforts. This publication summarizes the presentations and discussions from the workshop.