One of five U.S. adults with health insurance spent 5 percent or more of their income on out-of-pocket health care costs, excluding premiums, over the past year, and one of eight spent 10 percent or more, according to a new Commonwealth Fund survey. Most of those responding to the survey—part of a new series tracking how well health insurance plans are protecting their enrollees from high health care costs—had employer-sponsored health insurance. But the sample also included people with Affordable Care Act marketplace plans, individual health insurance, Medicaid, or some other coverage.