Employers give high ratings to Kaiser and UnitedHealthcare. Kaiser Permanente received the highest employer satisfaction rating among fully insured health plans in the 2011 employer Health Insurance Plan Study by J.D. Power and Associates. The annual study, which evaluates employer satisfaction with health plans, found that UnitedHealthcare received the highest rating among self-insured plans.
Here is a PDF of the report: http://bit.ly/roUUi7