G47.21
BillableCircadian rhythm sleep disorder, delayed sleep phase type
G47.21 is the ICD-10-CM code for Circadian rhythm sleep disorder, delayed sleep phase type. It is a billable, specific code valid for reimbursement.
G00-G99 Diseases of the nervous system
Includes
- •Delayed sleep phase syndrome
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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