Redesigning healthcare. New delivery initiatives include ACOs, walk-in clinics, medical homes.

The CMS' laboratory for revamping the healthcare delivery system doesn't expect to produce policy changes for two more years. That has left lawmakers impatient for results. "Of course, we're all eager to see the results of these models, but we need to be realistic; this change is difficult," says Dr. Richard Gilfillan, left, director of the Center for Medicare & Medicaid Innovation.