WASHINGTON (Reuters) -At least three U.S. lawmakers said on Tuesday healthcare providers were blocked from the Medicaid payment portal after the Trump administration announced a federal funding pause, even as the White House said the program was exempted.

President Donald Trump‘s administration sought to tamp down confusion over Medicaid funding in the wake of Office of Management and Budget director Matthew Vaeth’s memorandum pausing federal grant funding.

A funding freeze ordered by the Trump administration has sparked widespread confusion about its effects on government programs such as Medicaid.