Circassia is a dedicated diagnostics and monitoring company focused on respiratory disease. Our market-leading NIOX® products are used by physicians around the world to help improve asthma diagnosis and management, and we support our customers through our dedicated teams in the United States, Europe and China and our network of global partners.

Our purpose

Our purpose is to improve the quality of life for millions of people suffering from respiratory diseases.

As the leading provider of point-of-care FeNO monitoring and measurement products we are making good progress, helping healthcare professionals manage their patients’ asthma.

We believe every asthma patient should have access to the best care. To help achieve this, we are working hard to provide our customers with outstanding support, while devoting ourselves to developing the next generation of NIOX® innovations.

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Our history

Circassia was established in 2006, and in 2014 we completed an initial public offering on the London Stock Exchange. A year later, we acquired the NIOX® range of products, broadening our portfolio.

Circassia is now a dedicated diagnostics and monitoring company focused on respiratory disease, with a clear mission, market-leading products and strong commercial organization dedicated to providing outstanding customer support.