Book excerpt: A new release in the Quality Chasm Series, Priority Areas for National Action recommends a set of 20 priority areas that the U.S. Department of Health and Human Services and other groups in the public and private sectors should focus on to improve the quality of health care delivered to all Americans. The priority areas selected represent the entire spectrum of health care from preventive care to end of life care. They also touch on all age groups, health care settings and health care providers. Collective action in these areas could help transform the entire health care system. In addition, the report identifies criteria and delineates a process that DHHS may adopt to determine future priority areas.