More than 100 million Americans have their prescription drug benefits managed by Express Scripts, making it one of the largest pharmacy benefit managers in the country. If your insurance card mentions Express Scripts, understanding how it works can save you real money on medications. This intermediary sits between you, your health plan, and the pharmacy — negotiating drug prices, managing formularies, and processing claims behind the scenes. Here is what that actually means for your prescriptions and your wallet. (Free Market Healthcare is an independent resource and is not affiliated with, endorsed by, or sponsored by Express Scripts or The Cigna Group.)
What Is Express Scripts?
Express Scripts is a pharmacy benefit manager (PBM) owned by The Cigna Group and operated within Cigna’s health-services arm, Evernorth Health Services. A PBM acts as a middleman between health insurers, drug manufacturers, and pharmacies. Express Scripts negotiates rebates with pharmaceutical companies, determines which drugs your plan covers, and administers the copay structure your plan defines.
Founded in 1986 and headquartered in the St. Louis, Missouri area, the company merged with Cigna in 2018 in a deal valued at roughly $67 billion. Industry analysts, including the Drug Channels Institute, consistently place Express Scripts among the top three PBMs alongside CVS Caremark and OptumRx — a trio that together administers roughly 80% of U.S. prescription claims, according to the Federal Trade Commission. That concentration is exactly why PBMs have drawn so much policy attention in recent years.
How Express Scripts Manages Your Prescriptions
When your employer or health plan contracts with Express Scripts, the PBM takes over several key functions. It builds a formulary — a list of covered medications organized into tiers. Tier 1 typically includes low-cost generics with the smallest copays. Tier 2 covers preferred brand-name drugs. Tiers 3 and above include non-preferred brands and specialty medications, each generally carrying progressively higher out-of-pocket costs. Exact tier placement and cost share are set by your specific plan, so two people who both “have Express Scripts” can pay very different amounts for the same drug.
Express Scripts also handles claims processing. When you hand your insurance card to a pharmacist, the system checks your coverage in real time. It verifies your eligibility, confirms the drug is on formulary, applies any prior authorization requirements, and calculates your cost share — all within seconds.
Beyond formulary management, the company runs utilization management programs. These include step therapy protocols (requiring you to try a lower-cost drug before a costlier one), quantity limits, and prior authorization requirements for certain medications. These controls are meant to manage cost and safety, but they can also add friction — which is one reason patients and prescribers sometimes need to file appeals.
Express Scripts Mail Order Pharmacy
One of the most-used features is the Express Scripts mail order pharmacy, operated as Express Scripts Pharmacy. Rather than picking up a 30-day supply at your local pharmacy, mail order lets you receive up to a 90-day supply delivered to your door. For maintenance medications — drugs you take regularly for chronic conditions — this often translates to a lower per-pill cost, though the actual savings depend on your plan’s benefit design.
Setting up mail order is straightforward. You can register on the official Express Scripts website or app, contact member services using the number printed on your prescription ID card, or ask your prescriber to send the prescription directly to Express Scripts. Delivery timelines vary; first-time orders can take longer than refills, so it is wise to request a new mail-order prescription before your current supply runs low.
Express Scripts states that members who move maintenance medications to mail order can save compared with retail fills, though your mileage will vary by plan and drug. Temperature-sensitive medications generally ship with cold packs, and availability of controlled substances through mail order depends on your state and plan rules.
The Formulary and Drug Coverage
Your specific formulary depends on the plan your employer or insurer selected. Express Scripts offers several formulary options ranging from open lists (covering most drugs with varying copays) to more restrictive lists that emphasize generics and preferred brands. Formularies also change — commonly at the start of each plan year — so a drug covered this year can move tiers or drop off next year.
Checking whether your medication is covered takes just a few minutes. Log into your account on the Express Scripts website or mobile app, open the drug pricing tool, and search for your medication by name. The tool shows your estimated cost share, any restrictions, and whether a lower-cost alternative exists. Prices shown are estimates — confirm at the pharmacy counter.
If your medication is not on formulary, you have options. Your prescriber can submit a prior authorization or a formulary exception request explaining why you need that specific drug. For Medicare Part D plans, coverage determination and appeal timelines are set by CMS — generally a decision within 72 hours for standard requests and 24 hours for expedited (urgent) requests, with faster windows once a formal request is filed. Commercial (employer) plan timelines can differ, so ask about the deadline that applies to you.
Express Scripts for Employer-Sponsored Plans
Many Americans encounter Express Scripts through their employer’s health plan. Employers contract with the PBM to manage pharmacy benefits for their workforce, hoping to control rising drug costs. Express Scripts provides the employer with tools to analyze spending trends, identify high-cost claims, and implement cost-management strategies.
For employees, this relationship determines everything from which pharmacies you can use to how much you pay for a prescription. Some plans include a preferred pharmacy network, where costs are lower at certain retail chains. Others may require mail order for maintenance medications after the first few fills. Because employers choose the plan design, your HR or benefits team is often the fastest route to answers about why a drug is or is not covered.
Express Scripts and TRICARE
Express Scripts holds the contract to administer pharmacy benefits for TRICARE, the health care program serving active-duty military, retirees, and their families. The program covers millions of beneficiaries, according to the Military Health System. (Exact beneficiary counts change year to year — verify the current figure at health.mil.)
TRICARE beneficiaries use Express Scripts for mail-order prescriptions and to manage their pharmacy benefits. The copay structure for TRICARE differs from commercial plans; for example, active-duty service members generally pay nothing for covered generics filled at military pharmacies or through TRICARE home delivery. Copays are periodically updated, so confirm current amounts through the official TRICARE pharmacy resources.
Common Criticisms and Controversies
Express Scripts, like other major PBMs, faces significant scrutiny. Critics argue that the rebates PBMs negotiate with drug manufacturers do not always translate into lower costs for patients at the counter. A July 2024 interim staff report from the Federal Trade Commission — titled “Pharmacy Benefit Managers: The Powerful Middlemen Inflating Drug Costs and Squeezing Main Street Pharmacies” — found that the three largest PBMs wield outsized influence over which drugs patients can access and at what price, and raised concerns about the fees and reimbursement terms PBMs impose on independent pharmacies.
The scrutiny went further in September 2024, when the FTC filed an administrative complaint against the three largest PBMs — including Express Scripts (ESI) — and their affiliated group purchasing organizations, alleging they built a rebate system that favored high list-price, highly rebated insulins over cheaper alternatives, contributing to higher out-of-pocket costs for some patients with deductibles or coinsurance. As of this writing, that is an ongoing enforcement proceeding, not a final ruling, and the companies have disputed the allegations; readers should verify the current status of the case, as outcomes may have changed.
Ongoing PBM reform efforts in Congress and in the states aim to increase transparency around rebate negotiations, “spread pricing,” and the fees PBMs charge pharmacies. Several states have already passed laws requiring PBMs to disclose more about their pricing practices, and additional federal proposals have been debated in recent sessions.
Vertical integration raises additional concerns. Because Cigna owns both an insurance arm and a PBM (Express Scripts, within Evernorth), critics worry about potential conflicts of interest — particularly when a PBM can steer patients toward affiliated pharmacies or services. Supporters counter that integration can create efficiencies. This is a genuinely contested policy debate; reasonable experts disagree.
Frequently Asked Questions
How do I contact Express Scripts customer service?
Use the member services number printed on the back of your prescription ID card, or log in at the official Express Scripts website or mobile app, which typically offers secure messaging or live chat. Because member phone lines and hours differ by plan (commercial, Medicare, and TRICARE all route differently), the number on your card is the most reliable contact — avoid third-party numbers that may not be official.
Can I use any pharmacy with Express Scripts?
Most plans administered by Express Scripts include a network of retail pharmacies where you can fill prescriptions. However, your cost may vary depending on whether the pharmacy is in-network, preferred, or out-of-network, and some plans require mail order for certain maintenance drugs. Check your plan documents or the Express Scripts pharmacy locator tool for details.
How do I switch to Express Scripts mail order?
Log into your Express Scripts account, select an eligible prescription, and follow the prompts, or ask your prescriber to send a new 90-day prescription directly to Express Scripts Pharmacy. Allow extra time for your first mail-order delivery, and keep enough of your current supply on hand so you do not run out during the transition.
Does Express Scripts cover specialty medications?
Yes. Express Scripts operates Accredo, its specialty pharmacy, which handles high-cost medications for complex conditions such as cancer, rheumatoid arthritis, and multiple sclerosis. Specialty drugs often require prior authorization and may have different cost-sharing rules than standard medications. Your plan determines which specialty drugs are covered and where they must be filled.
Is Express Scripts the same as my insurance?
No. Express Scripts is a pharmacy benefit manager, not an insurer. It administers the prescription-drug portion of your plan on behalf of your employer, health plan, or government program. Your medical benefits may be handled by a different company entirely, even if your PBM is Express Scripts.
Making the Most of Your Express Scripts Benefits
Getting the best value from Express Scripts starts with knowing your plan. Review your formulary at least once a year — it changes annually, and a drug covered this year may move tiers or drop off the list entirely. Use the price comparison tools on the website to check estimated costs at different pharmacies. Consider mail order for any medication you take consistently, since 90-day supply pricing often beats monthly retail fills, and ask your prescriber about lower-tier generic or biosimilar alternatives when appropriate.
If you receive a coverage denial, do not give up. Work with your prescribing clinician to submit a formal appeal, including clinical documentation explaining why that specific drug is medically necessary. Ask what appeal level and deadline apply to your plan, and keep copies of everything you submit. A meaningful share of initial denials are overturned on appeal, so persistence pays off. For a broader look at how PBMs fit into the healthcare system, visit our healthcare policy guide.
TL;DR: Express Scripts is a pharmacy benefit manager owned by The Cigna Group (via Evernorth). It builds your plan’s formulary, negotiates rebates, processes pharmacy claims, runs prior authorization and step therapy, and operates mail-order and Accredo specialty pharmacies. Your exact costs depend on the plan your employer, insurer, or government program chose — not on Express Scripts alone. Since 2024 the company and the other two largest PBMs have faced FTC scrutiny (a July 2024 report and a September 2024 administrative complaint over insulin rebates); that litigation is ongoing, so verify the current status. For coverage or contact questions, use the number on your prescription ID card or the official Express Scripts website.
This article is for general educational purposes only and is not medical, legal, financial, or insurance advice. Free Market Healthcare is independent and not affiliated with Express Scripts or The Cigna Group. Plan rules, prices, phone numbers, and program details change frequently — always verify with your plan documents and official sources.
Sources
- Federal Trade Commission, “Pharmacy Benefit Managers: The Powerful Middlemen Inflating Drug Costs and Squeezing Main Street Pharmacies,” interim staff report (July 2024) — ftc.gov
- Federal Trade Commission, “FTC Sues Prescription Drug Middlemen for Artificially Inflating Insulin Drug Prices,” press release (September 2024) — ftc.gov
- Centers for Medicare & Medicaid Services (CMS), Medicare Part D coverage determinations and appeals — cms.gov
- Military Health System / TRICARE, Health Care Program Facts and Statistics — health.mil
- The Cigna Group / Evernorth Health Services corporate disclosures