OPEN MINDS Update On Accountable Care Organizations The accountable care organization (ACO) is a new term for an old idea. The old idea – organizing health care provider organizations to manage health care funds. The new term for this old idea was born in the Patient Protection and Affordable Care Act (PPACA): Eligible providers will include professionals in group practice arrangements; Networks of individual practices of ACO professionals; Partnerships or joint venture arrangements between hospitals and ACO professionals; Hospitals employing ACO professionals; Such other groups of providers of . . .