G44.04 - Chronic paroxysmal hemicrania G44.0 - Cluster headaches and other trigeminal autonomic cephalgias (TAC) G44.04 - Chronic paroxysmal hemicrania
G44.041 - Chronic paroxysmal hemicrania, intractable G44.049 - Chronic paroxysmal hemicrania, not intractable