G47.21 Circadian rhythm sleep disorder, delayed sleep phase type
ICD-10-CM · CMS code reference
Official ICD-10-CM description: Circadian rhythm sleep disorder, delayed sleep phase type
Coding notes
From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.
Also covers
- Delayed sleep phase syndrome
Excludes2
Not part of this code, but both can be coded when both are documented.
Related codes
G47.20Circadian rhythm sleep disorder, unspecified type ICD-10-CMG47.22Circadian rhythm sleep disorder, advanced sleep phase type ICD-10-CMG47.23Circadian rhythm sleep disorder, irregular sleep wake type ICD-10-CMG47.24Circadian rhythm sleep disorder, free running type ICD-10-CMG47.25Circadian rhythm sleep disorder, jet lag type ICD-10-CMG47.26Circadian rhythm sleep disorder, shift work type ICD-10-CMG47.27Circadian rhythm sleep disorder in conditions classified elsewhere ICD-10-CMG47.29Other circadian rhythm sleep disorder ICD-10-CM
Common questions
Is G47.21 a billable code?
Yes. G47.21 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.