Report touts savings of drug plan administrators amid merger controversy

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The report goes on to caution against several state and federal proposals that would limit the administrators' ability to cut costs. These include: mandating coverage of brand-name drugs, increasing pharmacy reimbursements, restricting the use of mail-service pharmacies and forcing the disclosure of proprietary contract information. 

The report concludes that government limits on PBMs' cost-containment tools could cost $550 billion over a decade.