Enormous and fundamental changes are currently taking place in health care delivery. These changes include the consolidation of health care providers—from hospitals, physicians, and insurance companies, to medical supply businesses, managed care networks, and other health care providers—and numerous health care and insurance reform efforts by government at all levels. These changes pose significant implications for the delivery of health care in the United States, and will impact the manner, cost, and accessibility of health care delivery. These changes will almost certainly affect the quality of health care services as well. The quality of health care in the United States has for many years been a central concern of government, industry, health care providers, payors, and consumers. Quality in health care is essential to overall national health, the guarantor of a productive and healthy populace, and an important indicator of United States social and technological preeminence.