The ACO Investment Model (AIM) is an Innovation Center initiative that provides upfront funding for new ACOs to form in rural areas and for existing small ACOs to continue participation in the Shared Savings Program. The Evaluation Report for the First Performance Year found that two-thirds of ACOs participating in the AIM were mostly rural; ACOs spent the most on care management, technology, and administrative functions; and there was net savings to Medicare of over $82 million.
