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G44.021

✓ Billable

Chronic cluster headache, intractable

Diseases of the nervous system (G00-G99)

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✅ No additional coding notes for G44.021

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Code Information

CodeG44.021
BillableYes
ParentG44.02
CategoryDiseases of the nervous system (G00-G99)
Excludes10 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)