Another top pharmacy benefit manager has been hit with class-action litigation alleging the company conspired with smaller PBMs to rig reimbursement rates and collect higher fees from pharmacies. Express Scripts, one of the country’s three largest PBMs that control more than 80% of the market, is under fire for allegedly entering price-fixing agreements with Prime Therapeutics, Benecard Services and Magellan Rx Management that enable the smaller PBMs to impose reimbursement rates and fees that are less favorable to pharmacies than...