Circadian rhythm sleep disorder
ICD-10 Code
G47.2
Circadian rhythm sleep disorder
Definition
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)
Also known as circadian sleep disorder — per MONDO