The moves follows Brian Thompson's murder, sharp public criticism, and a major blow to the insurer's stock price.

UnitedHealth CEO Andrew Witty is stepping down for personal reasons and the nation's largest health insurer suspended its full-year financial outlook due to higher-than-expected medical costs. Chairman Stephen Hemsley will become CEO, effective immediately, the Minnesota company said.

UnitedHealth Group Chief Executive Andrew Witty stepped down suddenly on Tuesday, the company said, as it suspended its 2025 forecast due to surging medical costs, sending its shares plunging more than 11% in morning trading.