G47 - Sleep disorders
G47.2 - Circadian rhythm sleep disorders
InclusionTerm:
-Disorders of the sleep wake schedule
-Inversion of nyctohemeral rhythm
-Inversion of sleep rhythm
G47.20 - Circadian rhythm sleep disorder, unspecified type
G47.21 - Circadian rhythm sleep disorder, delayed sleep phase type
G47.22 - Circadian rhythm sleep disorder, advanced sleep phase type
G47.23 - Circadian rhythm sleep disorder, irregular sleep wake type
G47.24 - Circadian rhythm sleep disorder, free running type
G47.25 - Circadian rhythm sleep disorder, jet lag type
G47.26 - Circadian rhythm sleep disorder, shift work type
G47.27 - Circadian rhythm sleep disorder in conditions classified elsewhere
G47.29 - Other circadian rhythm sleep disorder