A Yale University study analyzed the experience of 60 million Americans covered by traditional Medicare between 1999 and 2013, and found "jaw-dropping improvements in almost every area," the lead author says. Ann Cutting/Getty Images hide caption

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Coordinating care for high-risk patients was expected to save money and improve quality of care. A Medicare experiment didn't pan out. Roy Scott/Getty Images/Ikon Images hide caption

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One of the first signs drivers see on the way into Unionville, Mo. is this billboard advertising cardiology at Putnam County Memorial Hospital. Offering specialty services, like cardiology and psychiatry turned the hospital around, community leaders say. Bram Sable-Smith/KBIA/Side Effects Public Media hide caption

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AstraZeneca's Nexium was the top drug in Medicare Part D's spending on prescription medicines. Daniel Acker/Bloomberg via Getty Images hide caption

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Patient perceptions have been tough to change at Rowan Regional Medical Center in Salisbury, N.C. Joanna Serah/Wikimedia hide caption

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Cleveland Clinic pharmacist Katie Greenlee talks with Morgan Clay about how he should take his prescriptions when he leaves the hospital. Sarah Jane Tribble/WCPN/Ideastream hide caption

itoggle caption Sarah Jane Tribble/WCPN/Ideastream