G47.21 Circadian rhythm sleep disorder, delayed sleep phase type

The following code(s) above G47.21 may contain annotation back-references that may be applicable to G47.21:

• Diseases of the nervous system (G00-G99)
• Circadian rhythm sleep disorders (G47.2)

Diagnosis Index

Delay, Delayed
- Sleep Phase Syndrome G47.21
Disorder - see also Disease
- Sleep G47.9
-- Circadian Rhythm G47.20
--- Delayed Sleep Phase Type G47.21
Syndrome - see also Disease
- Delayed Sleep Phase G47.21