Hospital groups are threatening to sue the Trump administration for cutting Medicare payments for visits to clinics residing in hospitals.

The Centers for Medicare & Medicaid Services released a final rule on Friday outlining the cut to reimbursements for outpatient hospital departments, which include clinics or surgical centers. CMS lowered the reimbursements for such clinic visits to bring them in line with the reimbursements it gives out for visits to regular doctors’ offices, which are lower.