UnitedHealth (UNH) stock was down Friday on a report from The Wall Street Journal that the health insurance company faces a Department of

UnitedHealth Group (UNH) tanked as much as 12% on Friday, Feb. 21 following reports that the Department of Justice has launched an investigation into the healthcare services firm. The DOJ scrutiny is centered on the company’s Medicare billing practices,

The Justice Department is probing diagnoses and practices that triggered extra payments to UnitedHealth’s Medicare Advantage plans, people familiar with the matter say.