G47.2
⚠ Non-billable (Header)Circadian rhythm sleep disorders
Diseases of the nervous system (G00-G99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
Also Known As
Disorders of the sleep wake scheduleInversion of nyctohemeral rhythmInversion of sleep rhythm
⚠️ Excludes2
inherited from G47Rules from parent category G47: Sleep disorders
- • nightmares (F51.5)
- • nonorganic sleep disorders (F51.-)
- • sleep terrors (F51.4)
- • sleepwalking (F51.3)
Child Codes (9)
G47.20Circadian rhythm sleep disorder, unspecified typeG47.21Circadian rhythm sleep disorder, delayed sleep phase typeG47.22Circadian rhythm sleep disorder, advanced sleep phase typeG47.23Circadian rhythm sleep disorder, irregular sleep wake typeG47.24Circadian rhythm sleep disorder, free running typeG47.25Circadian rhythm sleep disorder, jet lag typeG47.26Circadian rhythm sleep disorder, shift work typeG47.27Circadian rhythm sleep disorder in conditions classified elsewhereG47.29Other circadian rhythm sleep disorder
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CodeG47.2
BillableNo — Header code
ParentG47
CategoryDiseases of the nervous system (G00-G99)
Excludes10 rule(s)
Excludes24 note(s)
Child codes9
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)