1. How many individuals might have marketplace coverage after the 2015 open enrollment period? Publication: [Washington, D.C.] : Department of Health and Human Services, Office of the Assistant Secretary for Planning and Evaluation, November 10, 2014 Subject(s): Health Insurance Exchanges -- utilizationMedically UninsuredNational Health Insurance, United States -- utilizationInsurance CoverageEligibility DeterminationUnited StatesUnited States.