ICD-10-CM > G00-G99 > G40-G47 > G44 > G44.0 > G44.03 G44.03 Episodic paroxysmal hemicrania Non-Billable/Non-Specific Applicable To Paroxysmal hemicrania NOS Codes G44.031Episodic paroxysmal hemicrania, intractableG44.039Episodic paroxysmal hemicrania, not intractable