The leading PBM by market share is CVS Health’s Caremark, the report found; it analyzed equivalent claims managed in 2022. Six PBMs accounted for 96 percent of the market share, and the top three made up 79 percent.
Here are the biggest PBMs by 2022 market share, according to Drug Channels:
CVS Health / Caremark: 33 percent
Cigna / Evernorth / Express Scripts: 24 percent
UnitedHealth / OptumRx: 22 percent
Humana Pharmacy Solutions: 8 percent
Prime Therapeutics / Magellan Rx: 5 percent
MedImpact Healthcare Systems: 4 percent
Other PBMs: 4 percent
The data does not account for claims management that smaller PBMs outsource to these companies, the number of lives covered through rebate negotiations or discount cards.
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