Since its founding, the Center for Medicare & Medicaid Innovation (CMMI) has tested more than 50 alternative payment models reaching more than 28 million patients across 528,000 health care providers and plans, yielding invaluable insights on the implementation of models to achieve better care, better health, and lower costs. On the other hand, many basic lessons learned are lessons unapplied. U.S. population health outcomes lag behind its highly...