Obama administration officials have warned that ambitious experiments run by the health law's $10 billion innovation lab wouldn't always be successful. Now there is evidence their caution was well placed. Only a small minority of community groups getting federal reimbursement to reduce expensive hospital readmissions produced significant results compared with those from sites that weren't part of the $300 million program, according to partial, early results. The closely watched program is one of many tests to control costs and improve care being run by the Center for Medicare and Medicaid Innovation, which was created by the Affordable Care Act.
