The United States health care system is the most expensive in the world, but the Commonwealth Fund report Mirror, Mirror 2017: International Comparison Reflects Flaws and Opportunities for Better U.S. Health Care shows the U.S. underperforms relative to 11 other industrialized countries on measures of access to care, equity, health care outcomes, and administrative efficiency. Use this interactive to see what would happen if the U.S. were to raise its health system performance to the levels achieved elsewhere in the world.