circadian rhythm sleep disorder circadian sleep disorder NCIT:C95071 A persistent or recurrent pattern of sleep disruption that is primarily due to an alteration of the circadian system or to a misalignment between the endogenous circadian rhythm and the sleep-wake schedule required by an individual's physical environment or social or professional schedule.(DSM IV) SCTID:3745000 ICD9:327.30 sleep-wake schedule disorder disorders of the sleep-wake schedule ICD10:G47.2 MONDO:0024361 sleeping behavior phenotype