This document provides guidelines for evaluating patients with pulmonary nodules from the American College of Chest Physicians. It summarizes the guideline objectives, target population, diagnostic and management interventions considered, major outcomes, methodology, recommendations, and validation process. The guideline was developed through a systematic review of literature and expert consensus to provide evidence-based recommendations. It defines solitary pulmonary nodules and provides 12 major recommendations on pre-test probability assessment, imaging tests, PET scanning, discussion of risks/benefits with patients, and tissue diagnosis.