ICD-10-CM > G00-G99 > G40-G47 > G43 > G43.9 > G43.91 G43.91 Migraine, unspecified, intractable Non-Billable/Non-Specific Applicable To Migraine, unspecified, with refractory migraine Codes G43.911Migraine, unspecified, intractable, with status migrainosusG43.919Migraine, unspecified, intractable, without status migrainosus