The charge to the Committee on Crossing the Quality Chasm: Adaptation to Mental Health and Addictive Disorders was broad, encompassing health care for both mental and substance-use conditions, the public and private sectors, and the comprehensive range of issues addressed in the 2001 Institute of Medicine report Crossing the Quality Chasm: A New Health System for the 21st Century. The committee was pleased to be asked to address this breadth of issues.