KEY POINTS
  • About 1 in 5 hospital admissions include a bill from an out-of-network provider.
  • More than 20 states have legislation to protect users from "balance billing," or out-of-network costs that can run into the thousands.

Health insurance wasn't enough to spare a high school teacher from a $108,951 hospital bill.

Drew Calver, 44, of Austin, Texas, had a heart attack last year, resulting in a four-day emergency hospital stay, according to a report from Kaiser Health News. Despite having health-care coverage, he wound up with the six-figure bill — thanks to a practice known as "balance billing."