1. State health- insurance marketplaces: three states used varied data sources for eligibility and had few indications of potentially improper enrollments : report to Congressional requesters Publication: Washington, D.C. : U.S. Government Accountability Office, September 2017 Subject(s): Cost Sharing -- economicsEligibility DeterminationHealth Insurance ExchangesInsurance, Health -- economicsFraudIncome TaxHumansIdahoMarylandRhode IslandUnited StatesUnited States.Centers for Medicare & Medicaid Services (U.S.)