There is no paradox that equals that found in the system of health care finance in the United States. The purpose of this chapter is to provide the reader with a general understanding of the dynamics of this paradox, its origins, and the ways in which it is sustained. To accomplish this, the chapter reviews the system of health care finance in the United States, both in terms of its current organization and in the evolvement of its unique structure. The topics include the magnitude and distribution of health care expenditures in the United States, the relative contributions of government and private sector forms of insurance, the fundamentals of risk and insurance, alternative models of health insurance finance and provider structures, and a detailed description of Medicare, Medicaid, and more recent policy initiatives in the public financing of health care.