Cayston Access Program®

The Cayston Access Program (CAP) offers a central point of contact to help patients access CAYSTON and ALTERA® Nebulizer System resources

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Specialty Pharmacies
Financial Assistance
Cayston Access Program Enrollment
  • Verify patients' health insurance benefits
  • Assess patients' co-payment obligations and their coverage for CAYSTON
  • Connect patients to specialty pharmacies dispensing CAYSTON
  • For more information, call 1-877-7CAYSTON
Specialty Pharmacies

CAYSTON is distributed through a select group of specialty pharmacies and cannot be obtained through a retail pharmacy. Click below for a complete list of pharmacies.

Specialty Pharmacy List
Financial Assistance

Co-Pay Coupon Programs for Most Patients With Commercial Insurance

Several support programs may be available for patients that require assistance for access to their prescription.

CAYSTON Co-Pay Coupon Program

Patients with private insurance may be eligible to pay no more than $10 per fill. No monthly limit, but capped at 7 fills per calendar year up to a maximum value of $8000 annually.


ALTERA co-pay coupon Program

Patients on CAYSTON may be eligible to save up to $430 when they pay a $10 co-pay for purchase of an ALTERA Nebulizer System or ALTERA replacement unit. Patients are eligible to receive up to 2 per year.


  • Enrolled in the Cayston Access Program
  • Not enrolled in a government healthcare prescription drug program such as Medicare Part D or Medicaid, including in the Medicare Part D coverage gap known as the "donut hole"
  • Click here for additional Terms and Conditions

Referrals to independent co-pay foundations*:

  • Eligible patients who require financial assistance may receive benefits through a co-pay coupon program
  • Patients can access a reimbursement specialist who can assist them with benefit and insurance issues

Beneficiaries of government drug coverage programs are excluded from eligibility.

  • Gilead co-pay coupon provides assistance to eligible commercially insured patients who are not enrolled in government healthcare prescription drug programs, such as Medicare Part D and Medicaid
  • Medicare Part D enrollees, while in the prescription drug coverage gap (the "donut hole"), are not eligible for the co-pay coupon
Cayston Access Program Enrollment

To enroll in CAP, an application must be completed by the patient and provider. The preferred method of submission is to fax the full completed form to the Cayston Access Program at 1-877-550-1705. A patient electronic signature can also be submitted at

*Gilead does not control or set financial assistance criteria.
Find the CAYSTON Access Program Enrollment Form
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CAP has dedicated customer service representatives by region to support you and your patients.
You can reach a representative at: 1-877-7CAYSTON.

Keep track of your patients enrolled in the Cayston Access Program with ALLY®.

Need to enroll your patients in the Cayston Access Program? Download the PDF.

Learn About the ALLY Refill Report Program