Final answer:
Medicare is funded by payroll taxes and premiums, Medicaid is funded jointly by federal and state governments, and private healthcare insurance is funded by premiums with potential employer contributions.
Step-by-step explanation:
Healthcare in the United States is financed through a combination of public (government-funded) programs and private insurance. Medicare is a federal program primarily funded by payroll taxes that provides health insurance to individuals 65 and older, as well as to younger people with certain disabilities.
It consists of different parts, including Hospital Insurance funded by a payroll tax, and Supplementary Medical Insurance funded through premiums and general revenues. Medicaid is jointly funded by federal and state governments and offers healthcare to individuals and families with low incomes. Finally, private healthcare insurance is funded by individual premiums paid to private insurance companies, often with contributions from employers as part of employee benefits packages.