The Refugee Health Information System (RHIS) for humanitarian settings was developed by the United Nations High Commissioner for Refugees (UNHCR) in 2004. As of 2009, it contained seven categories related to mental, neurological and substance use (MNS) conditions: epilepsy/seizure, alcohol/substance use disorder, mental retardation/intellectual disability, psychotic disorder, severe emotional disorder, medically unexplained somatic complaint and other psychological complaint. During a recent overhaul of the RHIS, the MNS categories were revisited.