With more patients being stuck with surprise medical bills for out-of-network providers, one health policy expert says Congress needs to do more to halt the practice entirely.

“I think this is an outrage,” Ashish Jha, M.D., director of the Harvard Global Health Institute, told lawmakers during a Senate Health Education Labor & Pensions (HELP) Committee hearing this week. “It’s unethical, if not illegal. Obviously it’s not illegal, but it ought to be.”