Whistleblowers: United Healthcare Hid Complaints About Medicare Advantage

United Healthcare Services Inc., which runs the nation’s largest private Medicare Advantage insurance plan, concealed hundreds of complaints of enrollment fraud and other misconduct from federal officials as part of a scheme to collect bonus payments it didn’t deserve, a newly unsealed whistleblower lawsuit alleges. The suit, filed by United Healthcare sales agents in Wisconsin, accuses the giant insurer of keeping a dual set of books to hide serious complaints about its services and of being intentionally ineffective at investigating misconduct by its sales staff.