To compile the list, Drug Channels analyzed estimated total equivalent prescription claims managed across the industry in 2023. CVS Caremark, Express Scripts and OptumRX managed 79% of prescription claims last year, the same percentage as in 2022.
The largest PBMs by 2023 market share, according to Drug Channels:
CVS Caremark: 34%
Express Scripts: 23%
OptumRx (UnitedHealth): 22%
Humana Pharmacy Solutions: 7%
MedImpact Healthcare Systems: 5%
Prime Therapeutics: 3%
All other PBMs and cash pay: 6%
Learn more here.