Should physician groups become  patient-centered medical homes (PCMH) and/or affiliate with  Accountable Care Organizations? 

This Medical Economics article provides some guidance.

 “Because the PCMH and ACO share common goals of lowering costs and improving patient outcomes, physicians often think of them interchangeably. But they differ in that a PCMH is an approach to care for an individual practice, whereas an ACO is a method of reimbursing a network of providers. ‘Basically, the PCMH is a care delivery mechanism, while the ACO is a payment mechanism,’ explains David Gans, FACMPE, senior industry affairs fellow with the Medical Group Management Association (MGMA).”’