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,

UnitedHealth Group stock tumbled in premarket trading Friday following a report that said the Justice Department had launched a civil fraud investigation into the company’s Medicare billing practices.

Key Takeaways Shares of UnitedHealth Group sank Friday following a report that the U.S. Department of Justice is investigating the company's diagnosing practices.The Wall Street Journal reported that the DOJ is probing whether the company tends to over-diagnose conditions that can earn larger Medicare Advantage payouts.

UnitedHealth Group stock is sinking Friday on reports the Justice Department is investigating the health insurer. Here's what to know.