UPMC says West Penn refuses to release takeover information

UPMC filed motions Friday accusing West Penn Allegheny Health System of refusing to comply with a discovery request in the latter's antitrust lawsuit against the former. West Penn sued UPMC and Highmark in 2009, saying they colluded to stifle competition. West Penn then released Highmark from the suit when the insurer essentially bought the region's second-largest hospital system.