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.
What Is Express Scripts?
Express Scripts is a pharmacy benefit manager (PBM) owned by Cigna Group, formerly known as Cigna Corporation. 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 sets your copay amounts.
Founded in 1986 and headquartered in St. Louis, Missouri, the company merged with Cigna in 2018 in a deal valued at approximately $67 billion. According to Drug Channels Institute, Express Scripts processes more than one billion prescriptions annually, placing it among the top three PBMs alongside CVS Caremark and OptumRx.
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 with progressively higher out-of-pocket costs.
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 cheaper drug before a costlier one), quantity limits, and prior authorization requirements for certain medications.
Express Scripts Mail Order Pharmacy
One of the most popular features is the Express Scripts mail order pharmacy. Rather than picking up a 30-day supply at your local pharmacy, mail order lets you receive a 90-day supply delivered to your door. For maintenance medications — drugs you take regularly for chronic conditions — this often translates to lower per-pill costs.
Setting up mail order is straightforward. You can register at Express-Scripts.com, call their customer service line, or ask your doctor to send the prescription directly to Express Scripts. Most orders arrive within 5 to 10 business days, with standard shipping included at no charge.
According to Express Scripts, members who switch to mail order for maintenance medications can save an average of 40% compared to retail pharmacy fills. Temperature-sensitive medications ship with cold packs, and controlled substances are available through mail order in most states.
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 (covering most drugs with varying copays) to more restrictive lists that emphasize generics and preferred brands.
Checking whether your medication is covered takes just a few minutes. Log into your account on the Express Scripts website or mobile app, navigate to the drug pricing tool, and search for your medication by name. The tool shows your estimated copay, any restrictions, and whether a cheaper alternative exists.
If your medication is not on formulary, you have options. Your doctor can submit a prior authorization request, explaining why you need that specific drug. Express Scripts reviews these requests and issues a decision, typically within 72 hours for non-urgent cases and 24 hours for urgent requests, according to CMS guidelines.
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 claimants, and implement cost-saving strategies.
For employees, this relationship determines everything from which pharmacy 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.
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. This contract covers approximately 9.5 million beneficiaries, according to the Military Health System.
TRICARE beneficiaries use Express Scripts for mail-order prescriptions and to manage their pharmacy benefits. The copay structure for TRICARE differs from commercial plans, with active-duty service members paying nothing for generic prescriptions at military pharmacies and through mail order.
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. A 2024 report from the Federal Trade Commission found that the three largest PBMs — including Express Scripts — retained a growing share of rebate dollars rather than passing them to consumers at the pharmacy counter.
Ongoing PBM reform efforts in Congress 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.
Vertical integration raises additional concerns. Because Cigna owns both the insurance arm and the PBM, critics worry about conflicts of interest — particularly when Express Scripts steers patients toward Cigna-affiliated services. Supporters counter that integration creates efficiencies that ultimately lower costs.
Frequently Asked Questions
How do I contact Express Scripts customer service?
You can reach Express Scripts by calling the number on the back of your prescription card or by calling 1-800-282-2881. The company also offers live chat through its website and mobile app. Customer service representatives can help with order status, coverage questions, and prior authorization inquiries.
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 copay may vary depending on whether the pharmacy is in-network, preferred, or out-of-network. Check your plan documents or the Express Scripts pharmacy locator tool for details.
How do I switch to Express Scripts mail order?
To start using mail order, log into your Express Scripts account, select a prescription you want to switch, and follow the prompts. You can also ask your doctor to send a new 90-day prescription directly to Express Scripts. Allow 10 to 14 business days for your first mail-order delivery.
Does Express Scripts cover specialty medications?
Yes. Express Scripts operates Accredo, its specialty pharmacy division, which handles high-cost medications for complex conditions like cancer, rheumatoid arthritis, and multiple sclerosis. Specialty drugs often require prior authorization and may have different copay structures than standard medications.
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 costs at different pharmacies. Switch to mail order for any medication you take consistently, since the 90-day supply pricing almost always beats monthly retail fills.
If you receive a denial for a medication, do not give up. Work with your prescribing doctor to submit a formal appeal. Include clinical documentation explaining why that specific drug is medically necessary. According to internal industry data, a significant portion of initial denials are overturned on appeal. For a broader look at how PBMs fit into the healthcare system, visit our healthcare policy guide.