ICD-11 code : 7A63;
Preferred Label : Non-24 hour sleep-wake rhythm disorder;
ICD-11 definition : Non-24 hour sleep-wake rhythm disorder is characterised by periods of insomnia and/or
daytime sleepiness, alternating with periods of relatively normal sleep, due to a
lack of entrainment of the circadian clock to the 24-hour environmental cycle. The
period length of the circadian/sleep-wake cycle is typically longer than 24 hours.
Symptoms occur as the circadian-controlled sleep-wake propensity cycles in and out
of phase with the environmental day-night cycle. The disorder is seen most commonly
in individuals with complete blindness. The symptoms should have persisted for at
least several months and result in significant distress or mental, physical, social,
occupational or academic impairment.;
ICD-11 synonym : Circadian rhythm sleep-wake disorder, non-entrained disorder type; Circadian rhythm sleep-wake disorder, non-24 hour type;
Origin ID : 312051047;
Currated CISMeF NLP mapping
- ICD-10 Mapping
Non-24 hour sleep-wake rhythm disorder is characterised by periods of insomnia and/or
daytime sleepiness, alternating with periods of relatively normal sleep, due to a
lack of entrainment of the circadian clock to the 24-hour environmental cycle. The
period length of the circadian/sleep-wake cycle is typically longer than 24 hours.
Symptoms occur as the circadian-controlled sleep-wake propensity cycles in and out
of phase with the environmental day-night cycle. The disorder is seen most commonly
in individuals with complete blindness. The symptoms should have persisted for at
least several months and result in significant distress or mental, physical, social,
occupational or academic impairment.
