ICD-10-CM
G47.21: Circadian rhythm sleep disorder, delayed sleep phase type
A billable ICD-10-CM diagnosis code.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
- Kind
- Billable code
- Category
- G47
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Nearby codes
A header groups codes and is not billed. A billable code is one you can report. Listed second marks a billable manifestation code (its CDC title says it is "classified elsewhere"): code the underlying disease or condition first, then this code.
- G47.20Circadian rhythm sleep disorder, unspecified 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 elsewhereListed second
- G47.29Other circadian rhythm sleep disorderBillable
It's the public CDC file. Check the current ICD-10-CM guidelines before you code.
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From G47. A note on a category applies to every code under it.