G44.81

✓ Billable

Hypnic headache

Diseases of the nervous system (G00-G99)

⚠️ Excludes2

inherited from G44.8

Rules from parent category G44.8: Other specified headache syndromes

• headache with orthostatic or positional component, not elsewhere classified (R51.0)

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Code Information

CodeG44.81

BillableYes

ParentG44.8

CategoryDiseases of the nervous system (G00-G99)

Excludes10 rule(s)

Excludes21 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)