ICD-10-CM > G00-G99 > G40-G47 > G43 > G43.7 > G43.71 G43.71 Chronic migraine without aura, intractable Non-Billable/Non-Specific Applicable To Chronic migraine without aura, with refractory migraine Codes G43.711Chronic migraine without aura, intractable, with status migrainosusG43.719Chronic migraine without aura, intractable, without status migrainosus