President Donald Trump on Thursday called on Congress to pass legislation intended to curb surprise medical bills, an issue with bipartisan interest on Capitol Hill but one that has stalled under intense industry lobbying.

Trump laid out core principles the White House wants in legislation, which officials hope Congress will send to the president later this year. Trump’s remarks came after lawmakers focused on the issue asked the White House to get involved to secure more support, a senior White House official said.

“Our initiative to end surprise medical billing is one of the many steps we’re taking to fix our nation’s broken health care system and to deliver better care with more choices at lower costs,” Trump said. “My administration is eager to work with both parties in Congress to save American patients thousands and thousands and thousands of dollars and to give American patients better piece of mind.”

The president called it “rather shocking” that the effort has bipartisan support.

The White House tasked Congress with addressing two situations where patients can face unexpected medical bills. One is when a patient goes to an out-of-network emergency room for urgent care, and secondly, when a patient is having elective surgery at an in-network facility but unexpectedly receives care from an out-of-network provider, such as an anesthesiologist or radiologist.