Subject: Cayston SGM 1880-A P2026

Drug

CRAYSTON  (aztreonam for inhalation solution)

Policy:

Indications

The indications below including FDA-approved indications and compendial uses are considered a covered benefit provided that all the approval criteria are met and the member has no exclusions to the prescribed therapy.

FDA-Approved Indication¹

Cayston is indicated to improve respiratory symptoms in cystic fibrosis (CF) patients with Pseudomonas aeruginosa.

All other indications are considered experimental/investigational and are not medically necessary.

Coverage Criteria

Cystic Fibrosis^1-3

Authorization of 12 months may be granted for members 2 years of age and older with cystic fibrosis when Pseudomonas aeruginosa is present in airway cultures OR the member has a history of Pseudomonas aeruginosa infection or colonization in the airways.

Continuation of Therapy

Authorization of 12 months may be granted for continued treatment in members requesting reauthorization for an indication listed in the coverage criteria who are experiencing benefit from therapy as evidenced by disease stability or disease improvement.

Place of Service:

Outpatient

The above policy is based on the following references:

1.      Cayston [package insert]. Foster City, CA: Gilead Sciences, Inc.; November 2019.

2.     Mogayzel PJ, Naureckas ET, Robinson KA, et al. Cystic fibrosis pulmonary guidelines. chronic medications for maintenance of lung health. Am J Respir Crit Care Med. 2013;187(7):680-689. doi:10.1164/rccm.201207-1160oe

3.     Lahiri T, Hempstead SE, Brady C, et al. Clinical practice guidelines from the Cystic Fibrosis Foundation for preschoolers with cystic fibrosis. Pediatrics. 2016;137(4):e20151784. doi:10.1542/peds.2015-1784

Copyright Aetna Inc. All rights reserved. Pharmacy Clinical Policy Bulletins are developed by Aetna to assist in administering plan benefits and constitute neither offers of coverage nor medical advice. This Clinical Policy Bulletin contains only a partial, general description of plan or program benefits and does not constitute a contract. Aetna does not provide health care services and, therefore, cannot guarantee any results or outcomes. Participating providers are independent contractors in private practice and are neither employees nor agents of Aetna or its affiliates. Treating providers are solely responsible for medical advice and treatment of members. This Clinical Policy Bulletin may be updated and therefore is subject to change.

June 13, 2026