Colorado could lose more than $10 billion in Medicaid funding over the next five years if a provision of the One Big Beautiful Bill Act becomes law.

The Senate parliamentarian has advised that a Medicaid provider tax overhaul central to President Donald Trump’s tax cut and spending bill doesn’t adhere to the chamber’s procedural rules, delivering a crucial blow as Republicans rush to finish the package this week.

Up to 3.4 million Medi-Cal patients could fall off the rolls if Congress imposes work requirements, according to the California Department of Health Care Services.