Neither CVS Caremark nor Express Scripts is universally better for every prescription. Your specific health plan determines its formulary, copay, pharmacy network, and prior-authorization rules, so compare the plan details for your drug and pharmacy.
CVS Caremark is CVS Health's pharmacy benefit manager (PBM), while Express Scripts is Evernorth/The Cigna Group's PBM. They are separate competing businesses under different parent companies, and each administers prescription benefits for health plans and employers, including formularies, claims processing, pharmacy networks, and mail-order services.
Use RxDiff to compare current cash prices for a prescription. RxDiff is free, needs no account or insurance, and is not a pharmacy or healthcare provider.
| Plan detail | CVS Caremark | Express Scripts |
|---|---|---|
| Benefit manager | Administers prescription benefits for health plans and employers. | Administers prescription benefits for health plans and employers. |
| Formulary and copay | Set by the member's specific plan. | Set by the member's specific plan. |
| Pharmacy and mail-order access | Check the plan's current pharmacy finder and terms. | Check the plan's current pharmacy finder and terms. |
| How to compare | Review your plan documents or ask member services about the exact medication, pharmacy, and coverage rules. | |
Your plan, not the PBM name alone, determines the formulary, copay, prior-authorization rules, and participating pharmacies. Two plans using the same PBM may have different coverage.
Caremark is associated with CVS Health, while Express Scripts is part of Evernorth. Both may offer retail, mail-order, and specialty services, but the available pharmacies and terms depend on the specific plan.
Check your plan's current drug list and pharmacy finder before filling a prescription. A discount offer can be compared with a cash price, but it is separate from insurance and generally does not count toward a deductible. PBM rebates and negotiated arrangements do not guarantee a lower point-of-sale cost for every patient.
Compare current cash prices by prescription and location.
Compare Prices on RxDiff →Both are pharmacy benefit managers that administer prescription benefits for health plans and employers. Formularies, pharmacy networks, mail-order terms, and coverage rules can differ by plan, so check the details of the plans available to you.
No. Your out-of-pocket cost depends on your plan's formulary and cost-sharing, the medication, pharmacy, and coverage rules. The PBM name alone does not tell you which prescription will cost less.
Look up your exact medication and dose in each plan's current formulary and pharmacy finder, then ask member services or the pharmacy for your cost at a covered location. Check whether prior authorization or mail-order terms apply.
Compare a cash or discount-card quote with your insurance cost before filling. Discount pricing is separate from insurance and generally does not count toward your deductible; confirm the applicable payment option with the pharmacy.
Editorial disclosure: RxDiff Editorial Team guides are for prescription price and savings information. They are not medical advice. Verify current prices, eligibility, and health information with the pharmacy, prescriber, pharmacist, or official source.