Express scripts countersues Anthem in contract dispute

Express Scripts Holding Co., the largest administrator of U.S. prescription drug benefits, on Tuesday denied allegations that it is overcharging health-insurer Anthem Inc. for prescription drugs, the latest volley in a bitter contract dispute between the health-care giants. Anthem, the second-largest U.S. health insurer, sued Express Scripts in March for about $15 billion in damages, alleging that the pharmacy-benefit manager, or PBM, violated its contract by refusing to renegotiate pricing terms in good faith and failing to meet certain operational duties.