RT Journal A1 Song Z, Lee TH T1 THe era of delivery system reform begins JF JAMA JO JAMA YR 2013 FD January 2 VO 309 IS 1 SP 35 OP 36 DO 10.1001/jama.2012.96870 UL http://dx.doi.org/10.1001/jama.2012.96870 AB Hospitals, health care centers, and physicians in turn are consolidating into accountable care organizations (ACOs) to address these new payment contracts, which reward lower spending and higher quality. In July, 89 new ACOs were launched in Medicare. Combined with 59 Medicare ACOs started in January, these organizations bring more than 130 000 physicians and 2.2 million beneficiaries into an emerging model of organization-based health care.1 Global budget contracts from private insurers are doing the same for millions more working-age adults, their families, and their physicians.2