Socialized medicine is a term used to describe and discuss systems of universal health care: medical and hospital care for all at a nominal cost by means of government regulation of health care and subsidies derived from taxation. Because of historically negative associations with socialism in American culture, the term is usually used pejoratively in American political discourse. The term was first widely used in the United States by advocates of the American Medical Association in opposition to President Harry S. Truman's 1947 health-care initiative.
The original meaning was confined to systems in which the government operates health care facilities and employs health care professionals. This narrower usage would apply to the British National Health Service hospital trusts and health systems that operate in other countries as diverse as Finland, Spain, Israel, and Cuba. The United States Veterans Health Administration and the medical departments of the U.S. Army, Navy, and Air Force, would also fall under this narrow definition. When used in that way, the narrow definition permits a clear distinction from single payer health insurance systems, in which the government finances health care but is not involved in care delivery.
More recently, American conservative critics of health care reform have attempted to broaden the term by applying it to any publicly funded system. Canada's Medicare system and most of the UK's NHS general practitioner and dental services, which are systems where health care is delivered by private business with partial or total government funding, fit the broader definition, as do the health care systems of most of Western Europe. In the United States, Medicare, Medicaid, and the US military's TRICARE fall under that definition. In specific regard to military benefits of a (currently) volunteer military, such care is an owed benefit to a specific group as part of an economic exchange, which muddies the definition yet further.