The Florida Hospital Association is legally challenging proposed changes in how much hospitals get paid to provide outpatient treatment to workers-compensation insurance patients. The association last week filed the challenge in the state Division of Administrative Hearings, contending that the changes in a hospital-reimbursement rule are invalid. The case was filed against the Florida Department of Financial Services’ Division of Workers’ Compensation. The department last month published the proposed changes, which relate to a manual that spells out reimbursement rates. In its challenge, the hospital association argues that the revised manual “contains radical changes in how hospitals would be paid for services and supplies rendered outpatients covered by workers’ compensation insurance.” It also argues that the proposal could lead to a 10 percent drop in reimbursement for outpatient services.