-In 1925, prescription drug monopolies begun after the federal government started allowing the patenting of drugs.
-In 1945, the McCarran-Ferguson Act led by the Roosevelt Administration exempted the business of medical insurance from most federal regulation, including antitrust laws.
-In 1946, favoured hospitals received federal subsidies (matching grants and loans) provided under the Hospital Survey and Construction Act passed during the Truman Administration.
-In 1951, employers started to become the dominant third-party insurance buyer during the Truman Administration after the Internal Revenue Service declared group premiums tax-deductible.
-In 1965, nationalisation was started with a government buyer monopoly after the Johnson Administration led passage of Medicare and Medicaid
-In 1972, The Nixon Administration started restricting the supply of hospitals by requiring federal certificate-of-need for the construction of medical facilities.
-In 1974, The Nixon Administration after the Employee Retirement Income Security Act exempted employee health benefit plans offered by large employers (e.g., HMOs) from state regulations and lawsuits
-In 1984, During the Reagan Administration after the Drug Price Competition and Patent Term Restoration Act permitted the extension of patents beyond 20 years.
These are the major regulations and government intervention, there is a whole host of others which caused the huge price rise aswell.
