G44.0 - Cluster headaches and other trigeminal autonomic cephalgias (TAC)
G44.00 - Cluster headache syndrome, unspecified
InclusionTerm:
-Ciliary neuralgia
-Cluster headache NOS
-Histamine cephalgia
-Lower half migraine
-Migrainous neuralgia
G44.001 - Cluster headache syndrome, unspecified, intractable
G44.009 - Cluster headache syndrome, unspecified, not intractable