This article is part of a series: Part 1 Part 3   Millions of additional insureds seeking healthcare from the same population of practicing physicians who are receiving ever-reducing reimbursement rates will cause physician practices to change rapidly and dramatically. The formation of Accountable Care Organizations (ACO) appears to be the root of the response to newly created physician reimbursement models. An ACO is a “healthcare organization characterized by a payment and care delivery model…