Improving health care delivery and individual and population health and controlling health care costs requires, among other things, an effective and efficient health care system. A significant and essential component of the health care system is the clinical professional workforce. Assuring appropriate and up-to-date education and training of this workforce is partly a role of the clinical professional credentialing process. Nursing is the largest clinical profession and one for which credentialing has challenges. Credentialing in nursing has both individual components and institutional components, with the adoption of such programs as the Magnet Recognition Program, which assesses and credentials the nursing environment in hospitals as a whole.