Does Express Scripts Cover Tirzepatide? Insurance Guide 2026
Bold opening Tirzepatide, a groundbreaking dual-action medication for diabetes and weight management, has transformed treatment for millions. As a glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) receptor agonist, tirzepatide offers superior blood sugar control and significant weight loss compared to older therapies. However, its high cost—often exceeding $1,000 per month—makes insurance coverage critical. Express Scripts, one of the largest pharmacy benefit managers (PBMs) in the U.S., plays a key role in determining whether patients can access tirzepatide affordably. This guide explores Express Scripts’ coverage policies, costs, and steps to secure approval for tirzepatide in 2026.
Does Express Scripts Cover Tirzepatide for Diabetes?
Express Scripts typically covers tirzepatide for type 2 diabetes under most commercial insurance plans, but coverage depends on the specific policy. As of 2026, tirzepatide (brand name Mounjaro) is listed on Express Scripts’ formulary for diabetes management, provided patients meet clinical criteria. These criteria usually include a diagnosis of type 2 diabetes, prior use of metformin or other first-line therapies, and an HbA1c level above target (often ≥7.0%).
However, coverage may vary by employer-sponsored plans or state Medicaid programs. Some plans require step therapy, meaning patients must try and fail other GLP-1 agonists (e.g., semaglutide) before tirzepatide is approved. Express Scripts may also impose quantity limits or prior authorization to ensure cost-effective use. Patients should verify their plan’s formulary or consult their healthcare provider to confirm eligibility.
Does Express Scripts Cover Tirzepatide for Weight Loss?
Express Scripts’ coverage of tirzepatide for weight loss (brand name Zepbound) is more restrictive than for diabetes. While the FDA approved tirzepatide for chronic weight management in 2023, many insurance plans—including those managed by Express Scripts—do not cover weight-loss medications unless mandated by state laws or employer benefits. As of 2026, Express Scripts may cover tirzepatide for obesity if the patient has a BMI ≥30 or ≥27 with weight-related comorbidities (e.g., hypertension, sleep apnea).
Even with these criteria, prior authorization is almost always required. Some plans exclude weight-loss drugs entirely, while others impose annual or lifetime dollar limits. Medicare Part D, for example, does not cover tirzepatide for weight loss, though some Medicare Advantage plans may offer exceptions. Patients should review their plan’s drug list or appeal with clinical documentation if denied.
How Much Does Tirzepatide Cost With Express Scripts?
The cost of tirzepatide with Express Scripts depends on the patient’s insurance tier, copay structure, and whether the medication is for diabetes or weight loss. Without insurance, tirzepatide retails for approximately $1,000–$1,200 per month. With Express Scripts coverage, out-of-pocket costs typically range from $25 to $150 per month for diabetes, depending on the plan’s formulary tier (e.g., Tier 3 or Tier 4).
For weight loss, copays may be higher or not covered at all. Some Express Scripts plans offer manufacturer coupons or savings cards (e.g., Eli Lilly’s Zepbound savings program), reducing costs to as low as $25 for eligible patients. High-deductible plans may require patients to pay the full price until the deductible is met. Patients can use Express Scripts’ price transparency tools or contact customer service to estimate their specific cost.
Tirzepatide Prior Authorization for Express Scripts
Prior authorization is a standard requirement for tirzepatide under Express Scripts, ensuring the medication is medically necessary and cost-effective. For diabetes, prescribers must submit documentation showing the patient’s HbA1c remains uncontrolled despite other therapies, along with a history of metformin use. For weight loss, providers must confirm the patient’s BMI and comorbidities, such as hypertension or prediabetes.
Express Scripts reviews prior authorization requests within 24–72 hours, though complex cases may take longer. If denied, the prescriber can appeal with additional clinical evidence, such as failed weight-loss attempts or worsening diabetes complications. Patients can track their prior authorization status through Express Scripts’ online portal or by calling customer service. Working with a healthcare provider familiar with Express Scripts’ requirements can streamline the process.
How to Get Express Scripts to Cover Tirzepatide
Securing Express Scripts coverage for tirzepatide requires a proactive approach. First, verify that tirzepatide is on your plan’s formulary by logging into your Express Scripts account or calling customer service. If it’s listed, your provider must submit a prior authorization request with supporting documentation, such as lab results (HbA1c, BMI) or records of failed therapies.
For weight loss, emphasize comorbidities like sleep apnea or cardiovascular risks to strengthen the case. If tirzepatide is not on the formulary, request a formulary exception, which requires a letter of medical necessity from your provider. Patients can also explore Eli Lilly’s patient assistance programs or copay cards to reduce costs. Persistence and thorough documentation are key to overcoming coverage barriers.
What to Do If Express Scripts Denies Tirzepatide
If Express Scripts denies coverage for tirzepatide, patients have several options. First, request a denial letter explaining the reason, which is required for an appeal. Common reasons include lack of medical necessity, missing documentation, or formulary exclusions. The next step is to file an appeal, either through your provider or directly with Express Scripts, including additional clinical evidence (e.g., updated lab results, letters from specialists).
If the appeal is denied, patients can escalate to an external review by an independent third party, as allowed by most state laws. For weight-loss denials, some states mandate coverage for obesity treatments, so checking local regulations may help. If all else fails, consider switching to a plan with better coverage during open enrollment or exploring patient assistance programs from Eli Lilly.
Express Scripts Alternatives If Tirzepatide Is Not Covered
If tirzepatide is not covered by Express Scripts, several alternatives may be more accessible. For diabetes, other GLP-1 agonists like semaglutide (Ozempic, Rybelsus) or dulaglutide (Trulicity) are often covered and may be cheaper. For weight loss, phentermine-topiramate (Qsymia) or bupropion-naltrexone (Contrave) are FDA-approved alternatives, though they work differently than tirzepatide.
Patients can also discuss lifestyle interventions with their provider, such as intensive behavioral therapy or medical nutrition programs, which may be covered by insurance. Some employers offer wellness programs with weight-loss benefits. If cost is the primary barrier, generic versions of older medications or compounded semaglutide (where legal) may provide a more affordable option.
Frequently Asked Questions
Does Express Scripts cover Tirzepatide for weight loss?
Express Scripts may cover tirzepatide for weight loss if the patient meets BMI and comorbidity criteria, but coverage is not guaranteed. Prior authorization is almost always required, and some plans exclude weight-loss drugs entirely. Patients should check their specific plan details.
How much is the Tirzepatide copay with Express Scripts?
Copays for tirzepatide with Express Scripts vary widely, typically ranging from $25 to $150 per month for diabetes. For weight loss, copays may be higher or not covered. Manufacturer savings programs can reduce costs to as low as $25 for eligible patients.
Can I appeal if Express Scripts denies Tirzepatide?
Yes, patients can appeal a denial by submitting additional clinical documentation, such as lab results or provider letters. Appeals must be filed within a specific timeframe, usually 60–180 days. If the internal appeal fails, an external review may be requested.
Disclaimer from HealthLeague Medical Board This article is for informational purposes only and does not constitute medical or insurance advice. Coverage policies for tirzepatide vary by plan and may change. Always consult your healthcare provider and insurance representative for personalized guidance. HealthLeague Medical Board does not endorse specific medications or insurance providers.