NIOX Group Plc designs, develops, and commercializes medical devices for the diagnosis, monitoring, and management of asthma and COPD worldwide. Its NIOX VERO system is a non-invasive, point-of-care offering that includes a small portable device, sensors, disposable mouthpieces, and breathing handles for measuring fractional exhaled nitric oxide (FeNO) levels. The company was formerly known as Circassia Group Plc and changed its name to NIOX Group Plc in September 2022. Incorporated in 2006, it is headquartered in Oxford, the United Kingdom.