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.