UnitedHealth Group shares plunge 18% on reported DOJ probe into possible Medicare fraud

Shares of UnitedHealth Group plunged more than 18% on Thursday following a report that the Justice Department is conducting a criminal investigation into the health-care giant over possible Medicare fraud.The DOJ is focusing on the company's Medicare Advantage business practices, but the exact nature of the potential criminal allegations is unclear, the Wall Street Journal reported late Wednesday, citing people familiar with the matter. In a statement, UnitedHealth Group said the Justice Department has not ...