UPDATE 1-U.S. Medicare Advantage repayments to rise 0.4 pct

N) are the biggest providers of Medicare Advantage plans, along with HealthSpring Inc (HS.N). Other providers include Aetna Inc (AET.N), Cigna Corp (CI.N) Coventry Health Care Inc (CVH.N), Health Net Inc (HNT.N) and WellPoint Inc (WLP.N). Last year's...