In New Jersey in March, Dianna Lopez of the Center for Family Services (right) speaks with Betsy Cruz, of Camden, N.J., about health insurance coverage during an Affordable Care Act information session. Lori M. Nichols/South Jersey Times/Landov hide caption

itoggle caption Lori M. Nichols/South Jersey Times/Landov

Construction is continuing at the Maryland Proton Treatment Center in downtown Baltimore. It's one of three such centers under development in the Washington, D.C., region. Jenny Gold/KHN hide caption

itoggle caption Jenny Gold/KHN

Kevin Wierhs and Susan Johnson confer about what works and what doesn't in managing diabetes. Sarah McCammon/Georgia Public Broadcasting hide caption

itoggle caption Sarah McCammon/Georgia Public Broadcasting

David Combs, an insurance broker in Kentucky, wound up benefiting from the Affordable Care Act, even though early on he had figured the law would put brokers out of business. Jenny Gold/Kaiser Health News hide caption

itoggle caption Jenny Gold/Kaiser Health News

Michael Granillo and his wife Sonia await treatment at an emergency room in Northridge, Calif. Anna Gorman, Kaiser Health News hide caption

itoggle caption Anna Gorman, Kaiser Health News

Eric Bleeker and a partner respond to 911 calls in this vehicle. The medical team can run simple lab tests and prescribe some drugs, which may spare a patient a trip to the ER. Eric Whitney hide caption

itoggle caption Eric Whitney

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

itoggle caption Courtesy of Chion Wolf/WNPR

First-year medical student Ngabo Nzigira gets ready to see a patient at a Kaiser Permanente facility in Sacramento. Andrew Nixon/Capital Public Radio hide caption

itoggle caption Andrew Nixon/Capital Public Radio

Arkansas, Kentucky, Delaware and Colorado have all seen significant increases since 2013 in the percentage of residents who have health insurance. Vectoraart/iStockphoto hide caption

itoggle caption Vectoraart/iStockphoto

Carmen Smith, 44, shows son Roland, 6, her new perfume. The Cleveland resident says getting on Medicaid has made it much easier to manage her diabetes. Sarah Jane Tribble/WCPN hide caption

itoggle caption Sarah Jane Tribble/WCPN