Mumbai, May 15 -- According to the media reports, the U.S. Department of Justice's healthcare fraud unit is investigating UnitedHealth's Medicare Advantage business practices. UnitedHealth has responded by affirming its confidence in the integrity of the program.

UnitedHealth is reportedly among Persistent Systems' top five clients, reportedly accounting for an "over $100 million" business relationship. However, the exact revenue exposure of Persistent Systems to UnitedHealth remains unclear.

The news comes on the heels of additional turbulence at UnitedHealth. On Tuesday (13 May), the company announced that CEO Andrew Witty would step down for personal reasons. Chairman Stephen Hemsley, who previously served as CEO from 2006 to 2017, h...