How to Save Money on Ambrisentan (Letairis) in 2026: Coupons, Discounts, and Patient Assistance

Ambrisentan (Letairis) is one of the most expensive medications in the United States. Brand-name Letairis has a retail cash price of approximately $13,000 to $14,200 per month. Generic ambrisentan — while significantly cheaper — still costs around $2,000 to $2,100 per month without assistance. For most patients with pulmonary arterial hypertension (PAH), insurance and savings programs are not optional; they are essential.

The good news: there are multiple assistance programs specifically designed for ambrisentan, and many patients pay far less than the sticker price. Here is a complete guide to every savings option available in 2026.

Option 1: Letairis Co-Pay Coupon Program (Brand Letairis, Commercial Insurance Only)

Gilead Sciences offers a Co-Pay Coupon Program for eligible patients taking brand Letairis who have commercial (private) insurance. Under this program, eligible patients may pay as little as $5 per month for their prescription.

Important limitations:

NOT valid for patients on Medicare, Medicaid, TRICARE, VA, or any federal or state-funded healthcare program

Only applies to brand Letairis — not generic ambrisentan

Your insurance must first approve the medication; the coupon covers remaining co-pay/coinsurance

Contact LEAP (Letairis Education and Access Program) at 1-866-664-5327 to enroll or get more information.

Option 2: Letairis Patient Assistance Program (Uninsured or Underinsured Patients)

Through the LEAP program, Gilead offers a Patient Assistance Program for patients who do not have insurance or whose insurance does not adequately cover Letairis costs. Qualifying patients may receive Letairis at no charge.

Eligibility is based on income and insurance status. Call LEAP at 1-866-664-5327 to apply or visit letairis.com/patients/financial-resources for details.

Option 3: Zydus Copay Savings Program (Generic Ambrisentan)

Zydus Pharmaceuticals offers a copay savings program for eligible commercially insured patients taking generic ambrisentan (and bosentan). Eligible patients may pay as little as $0 per prescription for up to 13 fills per year.

Like most manufacturer copay programs, this is not valid for Medicare, Medicaid, or other government insurance. Check with your pharmacy about eligibility and program enrollment.

Option 4: Medicare and Medicaid Patients — What to Know

Manufacturer copay cards are not available for Medicare or Medicaid beneficiaries. However, these patients are not without options:

Medicare Part D coverage: Ambrisentan is covered under most Part D plans. It typically falls on a specialty tier with significant cost-sharing. Once you reach the catastrophic phase, your out-of-pocket costs decrease substantially.

Medicare Extra Help / Low Income Subsidy (LIS): If you qualify for this program, your out-of-pocket costs for specialty drugs like ambrisentan are significantly reduced.

LEAP Medicare support: LEAP can help Medicare patients understand their benefits and identify third-party financial assistance resources for out-of-pocket costs.

Pulmonary Hypertension Association (phassociation.org): Lists financial assistance resources specifically for PAH medications including ambrisentan.

Option 5: Third-Party Patient Assistance Organizations

Several nonprofit and advocacy organizations provide financial assistance for PAH medications including ambrisentan:

Pulmonary Hypertension Association (PHA): phassociation.org — financial assistance directory for PAH patients

NeedyMeds: needymeds.org — comprehensive database of patient assistance programs by drug name

HealthWell Foundation: healthwellfoundation.org — disease fund grants for underinsured patients; check for PAH-specific fund availability

Patient Advocate Foundation: patientadvocate.org — co-pay relief and financial assistance services

Option 6: Insurance Plan Optimization

If you are choosing or changing insurance plans, ambrisentan's coverage tier and specialty drug policies vary significantly between plans. During open enrollment periods:

Check whether the plan's formulary covers generic ambrisentan and at what tier

Ask specifically about specialty drug copay amounts and annual out-of-pocket maximums

Understand prior authorization requirements — plans that are slow to process PAs for specialty drugs may create dangerous gaps for PAH patients

The Bottom Line

No one should have to skip PAH medication because of cost. The combination of manufacturer programs, specialty copay savings, and third-party patient assistance organizations means that many ambrisentan patients end up paying much less than the list price. If you are also having trouble finding the medication in stock, medfinder can help you locate it at pharmacies near you. For context on why it can be hard to find, see our article on why ambrisentan is hard to find in 2026.