Does Express Scripts Cover Mounjaro? Insurance Guide 2026

Mounjaro (tirzepatide) has revolutionized diabetes and weight management, but insurance coverage—especially through Express Scripts—can be confusing. As a leading pharmacy benefit manager (PBM), Express Scripts determines whether Mounjaro is included in your plan’s formulary, impacting out-of-pocket costs. This guide breaks down Mounjaro coverage under Express Scripts, including prior authorization requirements, cost estimates, and steps to take if denied. Whether you’re using Mounjaro for diabetes or weight loss, understanding your insurance benefits is key to accessing this medication affordably.

Does Express Scripts Cover Mounjaro for Diabetes?

Express Scripts typically covers Mounjaro for type 2 diabetes under most commercial insurance plans, but coverage depends on your specific policy. As a dual GLP-1/GIP receptor agonist, Mounjaro is FDA-approved for improving glycemic control in adults with type 2 diabetes, often making it a preferred option over older medications like insulin or metformin. However, Express Scripts may classify Mounjaro as a “non-preferred” drug, requiring higher copays unless your doctor justifies its necessity over alternatives.

To confirm coverage, check your plan’s formulary or contact Express Scripts directly. Some plans may require step therapy, meaning you must try and fail on cheaper medications (e.g., GLP-1 agonists like Ozempic) before Mounjaro is approved. If your plan covers Mounjaro, you’ll likely need prior authorization, which involves your doctor submitting clinical evidence (e.g., HbA1c levels, failed therapies) to prove medical necessity. Without this, Express Scripts may deny coverage, leaving you responsible for the full cost—often over $1,000 per month.

Does Express Scripts Cover Mounjaro for Weight Loss?

Express Scripts coverage for Mounjaro as a weight-loss treatment is less consistent than for diabetes. While Mounjaro is not yet FDA-approved specifically for obesity (its weight-loss indication is still under review), some plans may cover it off-label if prescribed for chronic weight management in patients with obesity (BMI ≥30) or overweight (BMI ≥27) with weight-related comorbidities (e.g., hypertension, sleep apnea). However, many Express Scripts plans exclude Mounjaro for weight loss, categorizing it as a “lifestyle drug” rather than a medical necessity.

If your plan does cover Mounjaro for weight loss, expect strict requirements. Express Scripts may mandate documentation of failed weight-loss attempts (e.g., diet, exercise, or other medications like phentermine) and proof of obesity-related health risks. Prior authorization is almost always required, and even then, approval is not guaranteed. Patients without coverage may face steep costs, though manufacturer savings programs (e.g., Mounjaro Savings Card) can reduce out-of-pocket expenses to as low as $25 per month for eligible individuals.

How Much Does Mounjaro Cost With Express Scripts?

The cost of Mounjaro with Express Scripts varies widely based on your insurance plan, copay tier, and whether you’ve met your deductible. Without insurance, Mounjaro retails for approximately $1,000–$1,300 per month, but Express Scripts-negotiated rates may lower this price. For patients with commercial insurance, copays typically range from $25 to $150 per month, depending on whether Mounjaro is classified as a preferred brand-name drug or a specialty medication.

If Mounjaro is not covered, Express Scripts may offer a discount through its pharmacy network, reducing the price to around $900–$1,100. Patients with high-deductible plans may pay the full negotiated rate until their deductible is met. To estimate your cost, use Express Scripts’ online price tool or call customer service with your plan details. Additionally, Eli Lilly’s Mounjaro Savings Card can further lower costs for eligible patients, capping monthly expenses at $25 for up to 12 months.

Mounjaro Prior Authorization for Express Scripts

Prior authorization (PA) is a standard requirement for Mounjaro under most Express Scripts plans, ensuring the medication is medically necessary before coverage is approved. For diabetes, your doctor must submit evidence such as:

• HbA1c levels ≥7% despite other treatments.
• Documentation of failed therapies (e.g., metformin, GLP-1 agonists).
• A detailed treatment plan showing why Mounjaro is superior to alternatives.

For weight loss, PA requirements are stricter. Express Scripts may demand:

• Proof of BMI ≥30 (or ≥27 with comorbidities).
• Records of failed weight-loss interventions (e.g., diet, exercise, or other medications).
• A physician’s note explaining why Mounjaro is critical for your health.

The PA process usually takes 3–10 business days. If denied, you can appeal by providing additional clinical evidence or requesting an external review. Working with your doctor to submit thorough documentation upfront can expedite approval and prevent delays in accessing Mounjaro.

How to Get Express Scripts to Cover Mounjaro

Securing Express Scripts coverage for Mounjaro requires a proactive approach. Start by verifying your plan’s formulary to confirm whether Mounjaro is included and at what tier. If it’s listed as non-preferred, ask your doctor to submit a prior authorization request with strong clinical justification. For diabetes, emphasize Mounjaro’s superior efficacy in lowering HbA1c compared to other GLP-1 agonists. For weight loss, highlight obesity-related comorbidities (e.g., diabetes, heart disease) to strengthen the case.

If your plan excludes Mounjaro, consider these strategies:

1. Appeal the decision: Submit additional medical records or a letter of medical necessity.
2. Explore patient assistance programs: Eli Lilly offers savings cards and copay assistance for eligible patients.
3. Switch plans: During open enrollment, compare Express Scripts plans to find one that covers Mounjaro.
4. Use a specialty pharmacy: Some Express Scripts plans require filling Mounjaro through a designated specialty pharmacy, which may offer lower costs.

What to Do If Express Scripts Denies Mounjaro

If Express Scripts denies coverage for Mounjaro, you have several options to challenge the decision. First, request a detailed explanation of the denial and review the reason (e.g., lack of medical necessity, missing documentation). Next, work with your doctor to submit an appeal, providing additional evidence such as:

• Updated lab results (e.g., HbA1c trends).
• Records of failed therapies.
• A peer-reviewed study supporting Mounjaro’s efficacy for your condition.

If the appeal is denied, you can request an external review by an independent third party. This process varies by state but often results in overturned denials if the medication is deemed medically necessary. Meanwhile, explore cost-saving alternatives like Eli Lilly’s Mounjaro Savings Card, which can reduce out-of-pocket costs to $25 per month for qualifying patients. If all else fails, discuss alternative medications (e.g., Wegovy for weight loss) with your doctor.

Express Scripts Alternatives If Mounjaro Is Not Covered

If Express Scripts refuses to cover Mounjaro, consider these alternatives:

1. Other GLP-1 agonists: Ozempic (semaglutide) or Wegovy (higher-dose semaglutide) may be covered for diabetes or weight loss, respectively. These are often preferred by Express Scripts and may have lower copays.
2. Manufacturer savings programs: Eli Lilly’s Mounjaro Savings Card can reduce costs to $25/month for eligible patients, even without insurance.
3. Patient assistance programs: Nonprofits like the Patient Access Network (PAN) Foundation offer grants to cover Mounjaro costs for qualifying low-income patients.
4. Switch PBMs: If you have employer-sponsored insurance, advocate for a plan that uses a different PBM (e.g., CVS Caremark) with better Mounjaro coverage.
5. Clinical trials: Some studies offer Mounjaro at no cost to participants.

Frequently Asked Questions

Does Express Scripts cover Mounjaro for weight loss?

Express Scripts coverage for Mounjaro as a weight-loss treatment is limited and often requires off-label use justification. Many plans exclude it unless prescribed for obesity-related comorbidities. Prior authorization is typically required, and approval is not guaranteed.

How much is the Mounjaro copay with Express Scripts?

Copays for Mounjaro under Express Scripts range from $25 to $150 per month, depending on your plan’s formulary tier. Patients with high-deductible plans may pay the full negotiated price (around $900–$1,100) until their deductible is met.

Can I appeal if Express Scripts denies Mounjaro?

Yes, you can appeal a denial by submitting additional medical evidence (e.g., lab results, failed therapies) through your doctor. If the appeal is denied, request an external review by an independent third party, which may overturn the decision.

Disclaimer from HealthLeague Medical Board: This article is for informational purposes only and does not constitute medical or insurance advice. Coverage for Mounjaro varies by plan, and decisions should be made in consultation with your healthcare provider and insurance representative. Always verify your benefits with Express Scripts before starting treatment.