Top PBMs by 2022 market share

One pharmacy benefit manager makes up one-third of the market, according to a May 23 report from Drug Channels

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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