Aymara Marchante (from left) and Wiktor Garcia talked with Maria Elena Santa Coloma, an insurance adviser with UniVista Insurance, during February 2015 sign-ups for health plans in Miami, Fla. Joe Raedle/Getty Images hide caption

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Dallas insurance agent Jo Ann Charron has worked with clients to help clear confusion over subsidies offered by plans on the federal health insurance exchange. This sort of free guidance can save insurance shoppers time and money, agents say. LM Otero/AP hide caption

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Elisa Carrero assists Julian Gauiria, of Paterson, N.J., with enrollment in the health insurance exchange in November. Signups continue to be brisk, health officials say. Tyson Trish/North Jersey/Landov hide caption

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Consumers can window shop on HealthCare.gov leading up to open enrollment, which starts Saturday. AP hide caption

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Under Kevin Counihan, Connecticut's health insurance exchange used concerts and storefront offices to reach customers. Courtesy of Chion Wolf/WNPR hide caption

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President Obama announced in early April that more than 7 million people had signed up for health insurance through the exchanges. Win McNamee/Getty Images hide caption

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Maritza Martinez worked with an insurance agent at a kiosk in a Miami mall to find the right health insurance plan for 2014. Joe Raedle/Getty Images hide caption

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