ICD-10-CM 2027 diagnosis code
G47.2Circadian rhythm sleep disorders
G47.2 is a header code, so it can't be reported by itself. Choose one of the 9 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About G47.2
G47.2 is the ICD-10-CM diagnosis code for circadian rhythm sleep disorders. It belongs to category G47 (sleep disorders), block G40-G47 (episodic and paroxysmal disorders) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.
Within G47 (sleep disorders), G47.2 is specifically for circadian rhythm sleep disorders. Related codes cover insomnia (G47.0), hypersomnia (G47.1), sleep apnea (G47.3), Narcolepsy and cataplexy (G47.4), parasomnia (G47.5), sleep related movement disorders (G47.6), other sleep disorders (G47.8) and sleep disorder, unspecified (G47.9).
To report this condition, pick the subcode that matches the documentation: G47.20 (type), G47.21 (type), G47.22 (type), G47.23 (type), G47.24 (type), G47.25 (type), G47.26 (type), G47.27 (elsewhere) and 1 more.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under G47.2
- G47.20Circadian rhythm sleep disorder, unspecified typeBillable
- G47.21Circadian rhythm sleep disorder, delayed sleep phase typeBillable
- G47.22Circadian rhythm sleep disorder, advanced sleep phase typeBillable
- G47.23Circadian rhythm sleep disorder, irregular sleep wake typeBillable
- G47.24Circadian rhythm sleep disorder, free running typeBillable
- G47.25Circadian rhythm sleep disorder, jet lag typeBillable
- G47.26Circadian rhythm sleep disorder, shift work typeBillable
- G47.27Circadian rhythm sleep disorder in conditions classified elsewhereBillable
- G47.29Other circadian rhythm sleep disorderBillable
Coding notes
- Disorders of the sleep wake schedule
- Inversion of nyctohemeral rhythm
- Inversion of sleep rhythm
Notes that apply from higher levels
Instructions written at a parent level also apply to G47.2.
› From G47 Sleep disorders
Broader instructions also apply from Chapter 6: Diseases of the nervous system.
Alphabetic index entries
2 entriesTerms in the official ICD-10-CM index that lead to G47.2.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about G47.2
Is G47.2 billable?
- No. G47.2 is a header code. Report one of its more specific subcodes instead.