G44.03 Episodic paroxysmal hemicraniaNon-billable header with 2 child codes.
G44.031 Episodic paroxysmal hemicrania, intractableG44.039 Episodic paroxysmal hemicrania, not intractableG44.1 Vascular headache, not elsewhere classified ("cluster headache (G44.0)")G43 Migraine ("headache syndromes (G44.-)")G89 Pain, not elsewhere classified ("headache syndromes (G44.-)")R51 Headache ("migraine and other headache syndromes (G43-G44)")G44.011 Episodic cluster headache, intractableG44.019 Episodic cluster headache, not intractableG44.02 Chronic cluster headacheG44.021 Chronic cluster headache, intractableG44.029 Chronic cluster headache, not intractableG44.03 Episodic paroxysmal hemicrania (this code)G44.031 Episodic paroxysmal hemicrania, intractableG44.039 Episodic paroxysmal hemicrania, not intractableG44.04 Chronic paroxysmal hemicraniaG44.041 Chronic paroxysmal hemicrania, intractableG44.049 Chronic paroxysmal hemicrania, not intractable