NIOX Group Plc, a diagnostics and management company, provides point-of-care fractional exhaled nitric oxide (FeNo) diagnosis and management products worldwide. Its products include NIOX VERO, a portable system for the non-invasive measurement of nitric oxide in human breath. The company was formerly known as Circassia Group Plc and changed its name to NIOX Group Plc in September 2022. NIOX Group Plc was incorporated in 2006 and is headquartered in Oxford, the United Kingdom.