Practice Management Companies Look to ACOs for Growth  Physician practice management companies are forging ahead with expansion plans into new areas of hospital-based medicine as they position themselves to participate in accountable care organizations and other aspects of health system reform, reports Victoria Stagg Elliott at American Medical News. The companies are not buying primary care and other outpatient practices right now, although they are expanding into areas of hospital-based medicine that have not traditionally been their focus. This is in part to improve their ability to reduce readmissions and receive bonuses for improving quality and decreasing costs within an…