The State of New York has filed antitrust claims against CVS, Wellpartner and Caremark, alleging a “tying scheme” that requires New York’s safety net hospitals to exclusively use a CVS-owned company to process federal subsidy claims.

The lawsuit, filed Wednesday in Manhattan Supreme Court, alleges the defendants violated antitrust laws by requiring the safety net hospitals and clinics within the federal 340B Drug Pricing Program to process claims through CVS-subsidiary Wellpartner LLC.