The health insurance giant has called a new report from WSJ "misinformation," but investors may not be so sure. Shares were down about 9% early Friday.

While Luigi Mangione today stands trial for the killing of UnitedHealthcare CEO Brian Thompson, the U.S. Justice Department is launching a civil fraud investigation into the conglomerate’s Medicare billing practices.

The Wall Street Journal continues to report misinformation on the Medicare Advantage (MA) program. The government regularly reviews all MA plans to ensure compliance and we consistently perform at the industry's highest levels on those reviews.

UnitedHealth Group shares declined 7.2% in premarket trading after The Wall Street Journal reported an investigation into billing practices at one of its units has been launched. Shares were trading around $466.

UnitedHealth Group Inc. shares fell early Friday after a report that the US Justice Department has begun investigating the insurer’s billing practices in recent months.

UnitedHealth shares turned lower in midday trading following reports of another probe into the nation's biggest health insurance group and its ties to government-funded healthcare programs. The Wall Street Journal reported that Sen.

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

Luigi Mangione appeared in New York State Court to face murder and terror charges for the killing of UnitedHealthcare CEO Brian Thompson, according to CNN.