Surprise billing may be about to get worse

The problem of surprise medical billing — which Congress failed to solve last year — is about to get worse, thanks to a feud between an insurance giant and a company that employs thousands of doctors.

The big picture Parents who have babies in intensive care, women with high-risk pregnancies and people who need anesthesia could receive unexpected bills in the mail as a result of the fight between Mednax, the physician-staffing firm, and UnitedHealth Group.

Where it stands: Certain Mednax doctors could be out of UnitedHealth's network as early...