The Chicago-based American Medical Association and the Illinois State Medical Society are suing data analytics firm MultiPlan, alleging that it’s at the center of a price-fixing conspiracy with health insurance companies that has hurt medical practices and, in turn, patients. The AMA and state medical society allege in their lawsuit that most of the nation’s health insurance companies have outsourced to MultiPlan the task of deciding how much they should reimburse doctors and other providers who provide services to patients while out-of-network. Typically, health insurance plans have groups of doctors and other providers who are considered “in-network” with whom they have negotiated discounted reimbursement rates, in exchange for encouraging their patients to see them.