ICD-10-CM category
G44: Other headache syndromes
Codes under G44 (Other headache syndromes). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| G44.0 | Cluster headaches and other trigeminal autonomic cephalgias (TAC) | — |
| G44.0 | Cluster headaches and other trigeminal autonomic cephalgias (TAC) | — |
| G44.00 | Cluster headache syndrome, unspecified | — |
| G44.00 | Cluster headache syndrome, unspecified | — |
| G44.001 | Cluster headache syndrome, unspecified, intractable | ✓ |
| G44.001 | Cluster headache syndrome, unspecified, intractable | ✓ |
| G44.01 | Episodic cluster headache | — |
| G44.01 | Episodic cluster headache | — |
| G44.1 | Vascular headache, not elsewhere classified | ✓ |
| G44.1 | Vascular headache, not elsewhere classified | ✓ |
| G44.02 | Chronic cluster headache | — |
| G44.02 | Chronic cluster headache | — |
| G44.2 | Tension-type headache | — |
| G44.2 | Tension-type headache | — |
| G44.03 | Episodic paroxysmal hemicrania | — |
| G44.03 | Episodic paroxysmal hemicrania | — |
| G44.3 | Post-traumatic headache | — |
| G44.3 | Post-traumatic headache | — |
| G44.04 | Chronic paroxysmal hemicrania | — |
| G44.04 | Chronic paroxysmal hemicrania | — |
| G44.4 | Drug-induced headache, not elsewhere classified | — |
| G44.4 | Drug-induced headache, not elsewhere classified | — |
| G44.05 | Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT) | — |
| G44.05 | Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT) | — |
| G44.5 | Complicated headache syndromes | — |
| G44.5 | Complicated headache syndromes | — |
| G44.8 | Other specified headache syndromes | — |
| G44.8 | Other specified headache syndromes | — |
| G44.009 | Cluster headache syndrome, unspecified, not intractable | ✓ |
| G44.009 | Cluster headache syndrome, unspecified, not intractable | ✓ |
| G44.09 | Other trigeminal autonomic cephalgias (TAC) | — |
| G44.09 | Other trigeminal autonomic cephalgias (TAC) | — |
| G44.011 | Episodic cluster headache, intractable | ✓ |
| G44.011 | Episodic cluster headache, intractable | ✓ |
| G44.019 | Episodic cluster headache, not intractable | ✓ |
| G44.019 | Episodic cluster headache, not intractable | ✓ |
| G44.20 | Tension-type headache, unspecified | — |
| G44.20 | Tension-type headache, unspecified | — |
| G44.021 | Chronic cluster headache, intractable | ✓ |
| G44.021 | Chronic cluster headache, intractable | ✓ |
| G44.21 | Episodic tension-type headache | — |
| G44.21 | Episodic tension-type headache | — |
| G44.22 | Chronic tension-type headache | — |
| G44.22 | Chronic tension-type headache | — |
| G44.029 | Chronic cluster headache, not intractable | ✓ |
| G44.029 | Chronic cluster headache, not intractable | ✓ |
| G44.30 | Post-traumatic headache, unspecified | — |
| G44.30 | Post-traumatic headache, unspecified | — |
| G44.031 | Episodic paroxysmal hemicrania, intractable | ✓ |
| G44.031 | Episodic paroxysmal hemicrania, intractable | ✓ |
| G44.31 | Acute post-traumatic headache | — |
| G44.31 | Acute post-traumatic headache | — |
| G44.32 | Chronic post-traumatic headache | — |
| G44.32 | Chronic post-traumatic headache | — |
| G44.039 | Episodic paroxysmal hemicrania, not intractable | ✓ |
| G44.039 | Episodic paroxysmal hemicrania, not intractable | ✓ |
| G44.40 | Drug-induced headache, not elsewhere classified, not intractable | ✓ |
| G44.40 | Drug-induced headache, not elsewhere classified, not intractable | ✓ |
| G44.041 | Chronic paroxysmal hemicrania, intractable | ✓ |
| G44.041 | Chronic paroxysmal hemicrania, intractable | ✓ |
| G44.41 | Drug-induced headache, not elsewhere classified, intractable | ✓ |
| G44.41 | Drug-induced headache, not elsewhere classified, intractable | ✓ |
| G44.049 | Chronic paroxysmal hemicrania, not intractable | ✓ |
| G44.049 | Chronic paroxysmal hemicrania, not intractable | ✓ |
| G44.051 | Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable | ✓ |
| G44.051 | Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable | ✓ |
| G44.51 | Hemicrania continua | ✓ |
| G44.51 | Hemicrania continua | ✓ |
| G44.52 | New daily persistent headache (NDPH) | ✓ |
| G44.52 | New daily persistent headache (NDPH) | ✓ |
| G44.53 | Primary thunderclap headache | ✓ |
| G44.53 | Primary thunderclap headache | ✓ |
| G44.059 | Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable | ✓ |
| G44.059 | Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable | ✓ |
| G44.59 | Other complicated headache syndrome | ✓ |
| G44.59 | Other complicated headache syndrome | ✓ |
| G44.81 | Hypnic headache | ✓ |
| G44.81 | Hypnic headache | ✓ |
| G44.82 | Headache associated with sexual activity | ✓ |
| G44.82 | Headache associated with sexual activity | ✓ |
| G44.83 | Primary cough headache | ✓ |
| G44.83 | Primary cough headache | ✓ |
| G44.84 | Primary exertional headache | ✓ |
| G44.84 | Primary exertional headache | ✓ |
| G44.85 | Primary stabbing headache | ✓ |
| G44.85 | Primary stabbing headache | ✓ |
| G44.86 | Cervicogenic headache | ✓ |
| G44.86 | Cervicogenic headache | ✓ |
| G44.89 | Other headache syndrome | ✓ |
| G44.89 | Other headache syndrome | ✓ |
| G44.091 | Other trigeminal autonomic cephalgias (TAC), intractable | ✓ |
| G44.091 | Other trigeminal autonomic cephalgias (TAC), intractable | ✓ |
| G44.099 | Other trigeminal autonomic cephalgias (TAC), not intractable | ✓ |
| G44.099 | Other trigeminal autonomic cephalgias (TAC), not intractable | ✓ |
| G44.201 | Tension-type headache, unspecified, intractable | ✓ |
| G44.201 | Tension-type headache, unspecified, intractable | ✓ |
| G44.209 | Tension-type headache, unspecified, not intractable | ✓ |
| G44.209 | Tension-type headache, unspecified, not intractable | ✓ |
| G44.211 | Episodic tension-type headache, intractable | ✓ |
| G44.211 | Episodic tension-type headache, intractable | ✓ |
| G44.219 | Episodic tension-type headache, not intractable | ✓ |
| G44.219 | Episodic tension-type headache, not intractable | ✓ |
| G44.221 | Chronic tension-type headache, intractable | ✓ |
| G44.221 | Chronic tension-type headache, intractable | ✓ |
| G44.229 | Chronic tension-type headache, not intractable | ✓ |
| G44.229 | Chronic tension-type headache, not intractable | ✓ |
| G44.301 | Post-traumatic headache, unspecified, intractable | ✓ |
| G44.301 | Post-traumatic headache, unspecified, intractable | ✓ |
| G44.309 | Post-traumatic headache, unspecified, not intractable | ✓ |
| G44.309 | Post-traumatic headache, unspecified, not intractable | ✓ |
| G44.311 | Acute post-traumatic headache, intractable | ✓ |
| G44.311 | Acute post-traumatic headache, intractable | ✓ |
| G44.319 | Acute post-traumatic headache, not intractable | ✓ |
| G44.319 | Acute post-traumatic headache, not intractable | ✓ |
| G44.321 | Chronic post-traumatic headache, intractable | ✓ |
| G44.321 | Chronic post-traumatic headache, intractable | ✓ |
| G44.329 | Chronic post-traumatic headache, not intractable | ✓ |
| G44.329 | Chronic post-traumatic headache, not intractable | ✓ |
Frequently asked questions
What is ICD-10-CM code G44?
G44 is an ICD-10-CM category covering Other headache syndromes. It contains 118 more specific diagnosis codes, 80 of which are billable.
Is G44 a billable code?
No — G44 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example G44.0 — Cluster headaches and other trigeminal autonomic cephalgias (TAC)). 80 of the 118 codes under G44 are billable.
What codes fall under G44?
G44 includes G44.0, G44.0, G44.00, G44.00, G44.001, plus 113 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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