Indiana's hospital boards and trial lawyers are closely monitoring a lawsuit that accuses the state's largest hospital group of charging uninsured patients more for treatment than insured patients. The case, set for May 10 arguments before the Indiana Supreme Court, involves a 2010 lawsuit by two uninsured patients who accuse IU Health of overbilling them. Although their breach-of-contract claims in the case amount to just a few thousand dollars, the legal stakes are high. Indianapolis trial lawyer Scott Weathers said a favorable ruling for his two clients could allow patients to sue over billings as far back as 10 years.