Catalyst for Payment Reform (CPR) filed an amicus brief to the United States Court of Appeals for the Ninth Circuit regarding a potential acquisition of a physician group by a hospital system in Boise, Idaho. CPR outlines the concerns of employers and other large health care purchasers generally about the increasing consolidation of health care providers, reviews the correlation between consolidation and higher prices, and highlights examples of how providers have improved the coordination of health care without consolidation.