Certain infectious and parasitic diseases

G44 Other headache syndromes
Excludes: atypical facial pain ( G50.1 )
headache NOS ( R51 )
trigeminal neuralgia ( G50.0 )
G44.0 Cluster headache syndrome
Chronic paroxysmal hemicrania
Cluster headache:
· chronic
· episodic
G44.1 Vascular headache, not elsewhere classified
Vascular headache NOS
G44.2 Tension-type headache
Chronic tension-type headache
Episodic tension headache
Tension headache NOS
G44.3 Chronic post-traumatic headache
G44.4 Drug-induced headache, not elsewhere classified
Use additional external cause code (Chapter XX), if desired, to identify drug.
G44.8 Other specified headache syndromes
G45 Transient cerebral ischaemic attacks and related syndromes
Excludes: neonatal cerebral ischaemia ( P91.0 )
G45.0 Vertebro-basilar artery syndrome
G45.1 Carotid artery syndrome (hemispheric)
G45.2 Multiple and bilateral precerebral artery syndromes
G45.3 Amaurosis fugax
G45.4 Transient global amnesia
Excludes: amnesia NOS ( R41.3 )
G45.8 Other transient cerebral ischaemic attacks and related syndromes
G45.9 Transient cerebral ischaemic attack, unspecified
Spasm of cerebral artery
Transient cerebral ischaemia NOS
G46* Vascular syndromes of brain in cerebrovascular diseases ( I60-I67† )
G46.0* Middle cerebral artery syndrome ( I66.0† )
G46.1* Anterior cerebral artery syndrome ( I66.1† )
G46.2* Posterior cerebral artery syndrome ( I66.2† )
G46.3* Brain stem stroke syndrome ( I60-I67† )
Syndrome:
· Benedikt
· Claude
· Foville
· Millard-Gubler
· Wallenberg
· Weber
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