 In May 2008 she became executive vice president of UnitedHealthcare at UnitedHealth Group.From January 2011 to November 2014, she served as the chief executive officer of UnitedHealthcare, the biggest US insurer, serving 45 million customers with revenue of $120 billion.Boudreaux was honored from 2008 to 2014 as one of Fortune's 50 Most Powerful Women in American Business.