Five (or Maybe Six?) Reasons that the Largest PBMs Operate Group Purchasing Organizations

In The Top Pharmacy Benefit Managers of 2022: Market Share and Trends for the Biggest Companies, I shared Drug Channels Institute's analysis showing that three pharmacy benefit managers (PBMs)—the Caremark business of CVS Health, the Express Scripts business of Cigna, and the OptumRx business of UnitedHealth Group—accounted for about 80% of total equivalent prescription claims in 2022.

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