UnitedHealth CEO Andrew Witty abruptly stepped down on Tuesday, sending shares down more than 12%. Witty is being replaced by Stephen Hemsley, UnitedHealth's former boss, with immediate effect ...

Mary Cunningham is a reporter for CBS MoneyWatch. Before joining the business and finance vertical, she worked at "60 Minutes," CBSNews.com and CBS News 24/7 as part of the CBS News Associate Program.

The company and other insurers have faced backlash from patients who say they were denied necessary care and providers say ...

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.Video ...