UnitedHealth dropped 11.4% in premarket trading after the Wall Street Journal reported that the U.S. Justice Department has launched an investigation into the company's Medicare billing practices in recent months.

Futures on the Dow Jones Industrial Average moved lower Friday morning, shedding 145 points, or 0.3%, after The Wall Street Journal reported that the Justice Department had launched a

UnitedHealth Group Inc. (NYSE: UNH) shares are trading lower Tuesday after the Wall Street Journal reported that Senator Chuck Grassley launched an inquiry into the company's Medicare billing practices.

UnitedHealth Group shares tumbled Friday on a report that the U.S. Department of Justice has started an investigation into the health care giant’s Medicare billing practices. The Wall Street Journal said federal officials have launched a civil fraud investigation into how the company records diagnoses that lead to extra payments for its Medicare

The U.S. Justice Department is investigating UnitedHealth's Medicare billing practices, the Wall Street Journal reported on Friday, while the health insurer said it was unaware of any new probe underway.

U.S. Senator Chuck Grassley requested detailed information on UnitedHealth's Medicare billing practices in a letter to CEO Andrew Witty, amid reports suggesting the insurer may have leveraged billing rules to its advantage.

The investigation is evaluating Medicare billing protocols, according to the report.UnitedHealth shares sank after The Wall Street Journal reported that the insurer's Medicare billing protocols are under Justice Department investigation.

Senator Chuck Grassley has launched an inquiry into UnitedHealth Group's Medicare Advantage billing practices following a report from The Wall Street Journal stating the company is being investigated by the U.

Eden Prairie-based health care giant says it’s not aware of the launch of any new Justice Department activity as reported by the Wall Street Journal.

The probe is analyzing the company’s practice of frequently logging diagnoses that trigger larger payments to its Medicare Advantage plans, according to a report.

The Justice Department is reportedly investigating UnitedHealth Group's Medicare billing practices, focuing on whether UnitedHealth inflated patient diagno