For some, Medicare is a model of what national health insurance could be in the United States. Despite its low administrative costs and significant contributions to the well-being of America's oldest and most disabled citizens, some critics assail the program as being out of sync with the needs of many senior citizens, while others often refer to it as "unsustainable" because of its high costs. Physicians and hospital administrators endlessly criticize and debate Medicare, but rely upon it for a substantial share of their revenues. In Medicare: A Policy Primer, Marilyn Moon explains what Medicare is, how it works, and where is it headed. She examines the problems facing the program and which reform options hold the most promise. She also examines the history of Medicare and how the program works in the broader context of health care, the federal government, and the economy. It is a clear introduction to one of the most critical debates in health policy and an important volume for anyone interested in the future of Medicare.