ICD-10-CM · Chapter 6 · G00–G99
G44.81
Hypnic headache
Diseases of the nervous system
Quick facts
- Code
- G44.81
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 6 — Diseases of the nervous system
- Category
- G44 — Other headache syndromes
- Specificity
- 5 characters
How coders use this code
ICD-10-CM G44.81 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of hypnic headache. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in G44
- G44Other headache syndromes
- G44.0Cluster headaches and other trigeminal autonomic cephalgias (TAC)
- G44.00Cluster headache syndrome, unspecified
- G44.001Cluster headache syndrome, unspecified, intractable
- G44.009Cluster headache syndrome, unspecified, not intractable
- G44.01Episodic cluster headache
- G44.011Episodic cluster headache, intractable
- G44.019Episodic cluster headache, not intractable
- G44.02Chronic cluster headache
- G44.021Chronic cluster headache, intractable
- G44.029Chronic cluster headache, not intractable
- G44.03Episodic paroxysmal hemicrania
- G44.031Episodic paroxysmal hemicrania, intractable
- G44.039Episodic paroxysmal hemicrania, not intractable
- G44.04Chronic paroxysmal hemicrania
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