Mail-Order Pharmacy by Part D Insurance Companies in 2026

Created by Melinda Caughill, Modified on Thu, 4 Dec, 2025 at 4:07 PM by Melinda Caughill

Many Medicare Part D plans require certain medications to be filled using a specific mail-order pharmacy.

This article provides a quick reference showing which mail-order service is used by the major stand-alone Part D insurance companies.

Mail-Order Pharmacy by Carrier

Insurance Company	Mail-Order Pharmacy	Notes
HealthSpring (formerly Cigna)	Express Scripts® Pharmacy	Primary mail-order pharmacy for 2026 plans
WellCare	Express Scripts® Pharmacy	Preferred mail-order provider
UnitedHealthcare (UHC)	Optum® Home Delivery Pharmacy	Part of the Optum Rx network
Aetna / SilverScript	CVS Caremark® Mail Service Pharmacy	Mail-order service within the CVS Health family
Humana	CenterWell Pharmacy™	Humana-owned pharmacy (formerly Humana Pharmacy)
Blue Cross Blue Shield (BCBS)	CVS Caremark® Mail Service Pharmacy	Blue MedicareRx PDP uses CVS for mail service (2026)

Good to Know:

Mail-order pharmacy requirements can vary by plan, contract year, and region.
Not all medications can be filled through mail order (for example, some controlled substances or temperature-sensitive drugs).
Insurance companies can change their pharmacy and mail-order partners from year to year.

Because of this, you should always confirm the mail-order pharmacy details for your specific plan before making any changes.

How to Confirm Your Mail-Order Pharmacy

To confirm the mail-order pharmacy for your exact plan, you can:

Log into your insurance company’s member portal.
Open your plan’s Evidence of Coverage (EOC) or Summary of Benefits.
Look for sections such as:
- “Pharmacy Network”
- “Mail-Order Pharmacy”
- “Home Delivery” or “Prescription Delivery”
If you do not see clear information, contact the plan’s member services phone number and ask:
“Which mail-order pharmacy does my Part D plan use for home delivery?”

HeyMOE Tip:

If you are considering using mail order, run your HeyMOE comparison using the mail-order option and compare the total annual costs to your preferred local pharmacy. That way, you can see whether mail order actually saves you money for your specific medications.