By the numbers. Medicare/Medicaid.
D019538:Health Care Surveys; D005102:Health Expenditures / Q000706:statistics & numerical data; D006279:Health Maintenance Organizations / Q000706:statistics & numerical data; D006801:Humans; D008484:Medicaid / Q000706:statistics & numerical data*; D006278:Medicare / Q000706:statistics & numerical data*; D014481:United States