Conservatives have pursued Medicaid block grants for decades to give states more power over the program.

Of the 3,129 general hospitals evaluated in the Hospital Readmission Reduction Program, 83% received a penalty.

A handful of insurers and state Medicaid programs are experimenting with bundled models, sometimes incorporating hospitals and other health providers.

Arizona became the first state to revamp its Medicaid regulations to make it easier for ride-sharing companies to participate in its nonemergency transportation benefit.