G44 Other headache syndromes
ICD-10-CM category G44 sits in Chapter 6 (Diseases of the nervous system, G00-G99). It contains 40 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Subcategories
G44.0 Cluster headaches and oth trigeminal autonm cephalgias (TAC)G44.00 Cluster headache syndrome, unspecifiedG44.01 Episodic cluster headacheG44.02 Chronic cluster headacheG44.03 Episodic paroxysmal hemicraniaG44.04 Chronic paroxysmal hemicraniaG44.05 Shrt lst unil nerlgif headache w cnjnct inject/tear (SUNCT)G44.09 Other trigeminal autonomic cephalgias (TAC)G44.2 Tension-type headacheG44.20 Tension-type headache, unspecifiedG44.21 Episodic tension-type headacheG44.22 Chronic tension-type headacheG44.3 Post-traumatic headacheG44.30 Post-traumatic headache, unspecifiedG44.31 Acute post-traumatic headacheG44.32 Chronic post-traumatic headacheG44.4 Drug-induced headache, not elsewhere classifiedG44.5 Complicated headache syndromesG44.8 Other specified headache syndromes
Billable codes in G44
| Code | Description |
|---|---|
G44.001 | Cluster headache syndrome, unspecified, intractable |
G44.009 | Cluster headache syndrome, unspecified, not intractable |
G44.011 | Episodic cluster headache, intractable |
G44.019 | Episodic cluster headache, not intractable |
G44.021 | Chronic cluster headache, intractable |
G44.029 | Chronic cluster headache, not intractable |
G44.031 | Episodic paroxysmal hemicrania, intractable |
G44.039 | Episodic paroxysmal hemicrania, not intractable |
G44.041 | Chronic paroxysmal hemicrania, intractable |
G44.049 | Chronic paroxysmal hemicrania, not intractable |
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 |
G44.091 | Other trigeminal autonomic cephalgias (TAC), intractable |
G44.099 | Other trigeminal autonomic cephalgias (TAC), not intractable |
G44.1 | Vascular headache, not elsewhere classified |
G44.201 | Tension-type headache, unspecified, intractable |
G44.209 | Tension-type headache, unspecified, not intractable |
G44.211 | Episodic tension-type headache, intractable |
G44.219 | Episodic tension-type headache, not intractable |
G44.221 | Chronic tension-type headache, intractable |
G44.229 | Chronic tension-type headache, not intractable |
G44.301 | Post-traumatic headache, unspecified, intractable |
G44.309 | Post-traumatic headache, unspecified, not intractable |
G44.311 | Acute post-traumatic headache, intractable |
G44.319 | Acute post-traumatic headache, not intractable |
G44.321 | Chronic post-traumatic headache, intractable |
G44.329 | Chronic post-traumatic headache, not intractable |
G44.40 | Drug-induced headache, not elsewhere classified, not intractable |
G44.41 | Drug-induced headache, not elsewhere classified, intractable |
G44.51 | Hemicrania continua |
G44.52 | New daily persistent headache (NDPH) |
G44.53 | Primary thunderclap headache |
G44.59 | Other complicated headache syndrome |
G44.81 | Hypnic headache |
G44.82 | Headache associated with sexual activity |
G44.83 | Primary cough headache |
G44.84 | Primary exertional headache |
G44.85 | Primary stabbing headache |
G44.86 | Cervicogenic headache |
G44.89 | Other headache syndrome |
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