The University of Miami Hospital must refund $3.7 million to the federal government following an audit of the hospital’s Medicare billing practices. The hospital is contesting the amount, saying the auditors extrapolated from too few claims, according to the Miami Herald. With the federal audit, 200 inpatient claims from April 2009 to December 2010 were randomly selected to review, totalling $2.9 million in payments. Of those claims, 68 “did not comply with agency rules.”