** Shares of health insurer UnitedHealth Group UNH.N fall 6.2% to $288.70 premarket
** The Wall Street Journal reported late on Wednesday that the U.S. Department of Justice is carrying out a criminal investigation into UnitedHealth for possible Medicare fraud
** The DOJ's healthcare-fraud unit is overseeing the criminal investigation, which focuses on the company's Medicare Advantage business practices, the Journal reported, citing people familiar with the matter
** "While we had hoped Tuesday’s nearly 18% decline had represented a bottom for the stock, adequately pricing incremental utilization risk in our view, the WSJ report rekindles headline risk, which fueled volatility earlier in the year"- RBC Capital Markets
** On Tuesday, UNH's CEO, Andrew Witty, stepped down unexpectedly, and the company simultaneously suspended its 2025 financial forecast due to rising medical costs
** Up to last close, stock down 39.1% YTD
(Reporting by Sneha S K )
(( Sneha.SK@thomsonreuters.com))

