John Martin, 24, was uninsured until a health care navigator told him he could get coverage through his parents' health plan. Jenny Gold hide caption

itoggle caption Jenny Gold

Henry Ford Hospital treats Detroit residents. About 1 in 3 residents of that city is uninsured, and the hospital CEO hopes Medicaid expansion will increase the number of people with health insurance. Eric Whitney hide caption

itoggle caption Eric Whitney

Does having health insurance make it less likely that people will come to the ER? No, says a study in Oregon. iStockphoto hide caption

itoggle caption iStockphoto

Dr. Tim Ihrig, a palliative care physician, treats Augie Avelleyra, 93, at his home in Fort Dodge, Iowa. Courtesy of Paula Avelleyra hide caption

itoggle caption Courtesy of Paula Avelleyra

Enroll America outreach workers talk to congregants at the Mt. Calvary Church in Jacksonville, Fla. Eric Whitney hide caption

itoggle caption Eric Whitney

Low-income adults formerly had few options for free health care. Leah Sessor had her blood pressure taken on April 14, 2012, during a free clinic at a racetrack in Bristol, Tenn. Mario Tama/Getty Images hide caption

itoggle caption Mario Tama/Getty Images

Wisconsin Gov. Scott Walker speaks at the Conservative Political Action Conference in March. Pete Marovich/Getty Images hide caption

itoggle caption Pete Marovich/Getty Images

Kyle Thompson and his family are all going to have health coverage in Oregon, thanks to the state's successful effort to enroll people in Medicaid. Kristian Foden-Vencil hide caption

itoggle caption Kristian Foden-Vencil

Click right this way for Medicaid. Connect for Health hide caption

itoggle caption Connect for Health

Bill Clinton says President Obama should figure out a way to honor his promise that people who like their insurance can keep it. OZY via Facebook hide caption

itoggle caption OZY via Facebook

Footprints mark the spot where immigrants stand while taking eye tests at the Salud Family Health Clinic in Ft. Collins, Colo. The nonprofit provides health care to immigrants seeking asylum and migrant farm workers. John Moore/Getty Images hide caption

itoggle caption John Moore/Getty Images