G44.0
⚠ Non-billable (Header)Cluster headaches and other trigeminal autonomic cephalgias (TAC)
Diseases of the nervous system (G00-G99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
❌ Excludes1
inherited from G44Rules from parent category G44: Other headache syndromes
- • headache NOS (R51.9)
⚠️ Excludes2
inherited from G44Rules from parent category G44: Other headache syndromes
- • atypical facial pain (G50.1)
- • headache due to lumbar puncture (G97.1)
- • migraines (G43.-)
- • trigeminal neuralgia (G50.0)
Child Codes (7)
G44.00Cluster headache syndrome, unspecifiedG44.01Episodic cluster headacheG44.02Chronic cluster headacheG44.03Episodic paroxysmal hemicraniaG44.04Chronic paroxysmal hemicraniaG44.05Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)G44.09Other trigeminal autonomic cephalgias (TAC)
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CodeG44.0
BillableNo — Header code
ParentG44
CategoryDiseases of the nervous system (G00-G99)
Excludes11 rule(s)
Excludes24 note(s)
Child codes7
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)