G44.021 Chronic cluster headache, intractable
Billable / valid for submission ICD10CM Release FY2026
Version history
| Release | Valid from | Valid to | Description | Billable |
|---|---|---|---|---|
| FY2026 | 2025-10-01 | current | Chronic cluster headache, intractable | yes |
Related codes in G44
- G44 Other headache syndromes
- G44.0 Cluster headaches and other trigeminal autonomic cephalgias (TAC)
- G44.00 Cluster headache syndrome, unspecified
- G44.001 Cluster headache syndrome, unspecified, intractable
- G44.009 Cluster headache syndrome, unspecified, not intractable
- G44.01 Episodic cluster headache
- G44.011 Episodic cluster headache, intractable
- G44.019 Episodic cluster headache, not intractable
- G44.02 Chronic cluster headache
- G44.029 Chronic cluster headache, not intractable
- G44.03 Episodic paroxysmal hemicrania
- G44.031 Episodic paroxysmal hemicrania, intractable
- G44.039 Episodic paroxysmal hemicrania, not intractable
- G44.04 Chronic paroxysmal hemicrania
- G44.041 Chronic paroxysmal hemicrania, intractable
- G44.049 Chronic paroxysmal hemicrania, not intractable
- G44.05 Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)
- G44.051 Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable
- G44.059 Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
- G44.09 Other trigeminal autonomic cephalgias (TAC)