Arizona v. Maricopa County Medical Society, 457 U.S. 332 (1982), was a U.S. Supreme Court case involving antitrust law. A society of doctors in Maricopa County, Arizona, established maximum fees that their members could claim for seeing patients who were covered by certain health insurance plans. Arizona charged them with violations of state antitrust law regarding price fixing. The society tried to rebut the state's charges by claiming that the maximum-fee arrangement was necessary to allow doctors to see these patients, and therefore generated economic benefits.