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G40-G47
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G44
G44
Other headache syndromes
G44.0
Cluster headaches and other trigeminal autonomic cephalgias (TAC)
G44.1
Vascular headache, not elsewhere classified
Billable
Notes
G44.2
Tension-type headache
G44.3
Post-traumatic headache
G44.4
Drug-induced headache, not elsewhere classified
G44.5
Complicated headache syndromes
G44.8
Other specified headache syndromes