G47.21✓ Billable
Circadian rhythm sleep disorder, delayed sleep phase type
Inclusion Terms
- •Delayed sleep phase syndrome
Code Hierarchy
┌6Diseases of the nervous system (G00-G99)├G40-G47Episodic and paroxysmal disorders (G40-G47)├G47Sleep disorders
└G47.21Circadian rhythm sleep disorder, delayed sleep phase type
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