What is Express Scripts? TRICARE Pharmacy Guide (2026) | TRICARE.com

*Note: TRICARE.com is an independent reference site and is not affiliated with the Department of Defense or the official TRICARE program. For official policy, visit TRICARE.mil.*

## Definition Express Scripts is the private company contracted by the Department of Defense to manage the TRICARE pharmacy benefit, including home delivery, retail pharmacy networks, and specialty medication services.

## What it means in practice If you are a TRICARE beneficiary, Express Scripts (ESI) is the company that handles your prescriptions. While your doctor provides the medical care, Express Scripts manages the "Pharmacy" portion of your insurance. They operate the TRICARE Pharmacy Home Delivery service, manage the network of nearly 60,000 retail pharmacies, and provide the mobile app used to track refills and check drug prices.

In most cases, you will interact with Express Scripts when you need a prescription filled outside of a Military Treatment Facility (MTF). For example, if you use the Home Delivery service, you will receive your medications in an Express Scripts-branded package. For 2026, Home Delivery remains the most cost-effective option for maintenance medications (those taken long-term for chronic conditions), typically offering a 90-day supply for a lower copay than retail pharmacies.

The specific costs you pay to Express Scripts vary by your beneficiary status (Group A vs. Group B) and the type of drug. In 2026, many generic medications are available for $0 copay at military pharmacies, while Home Delivery generics generally cost roughly $16 for a 90-day supply. If you use a non-network retail pharmacy, you may have to pay the full price upfront and file a claim with Express Scripts for partial reimbursement.

Beyond just shipping pills, Express Scripts determines the "Formulary," which is the list of medications covered by TRICARE and their cost tiers. They also manage "Prior Authorizations," which is the process where your doctor must prove to Express Scripts that a specific (often expensive) drug is medically necessary before the plan will pay for it.

## Related terms * **Formulary:** The list of brand-name and generic drugs covered by the TRICARE pharmacy benefit. * **Military Treatment Facility (MTF):** A military hospital or clinic where beneficiaries can often get prescriptions filled for a $0 copay. * **Maintenance Medication:** A drug taken regularly for chronic conditions that TRICARE usually requires to be filled via Home Delivery or an MTF. * **Non-Network Pharmacy:** A retail pharmacy that does not have an agreement with Express Scripts, resulting in much higher out-of-pocket costs. * **TRICARE West Region:** The geographic area managed by TriWest Healthcare Alliance for medical services, though Express Scripts handles pharmacy for both East and West.

## Sources * TRICARE Pharmacy Program (TRICARE.mil): [https://www.tricare.mil/pharmacy](https://www.tricare.mil/pharmacy) * Express Scripts TRICARE Official Site: [https://militaryrx.express-scripts.com/](https://militaryrx.express-scripts.com/) * Defense Health Agency Pharmacy Operations: [https://health.mil/Military-Health-Topics/Access-Cost-Quality-and-Safety/Pharmacy-Operations](https://health.mil/Military-Health-Topics/Access-Cost-Quality-and-Safety/Pharmacy-Operations)