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Diseases of the nervous system (G00-G99)
›
Episodic and paroxysmal disorders (G40-G47)
›
Other headache syndromes
›
G44.81
G44.81
✓ Billable
Hypnic headache
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Code Hierarchy
┌
6
Diseases of the nervous system (G00-G99)
├
G40-G47
Episodic and paroxysmal disorders (G40-G47)
├
G44
Other headache syndromes
└
G44.81
Hypnic headache
✨
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