Intractable ICD-10 Code Diagnoses G43.C1 Periodic Headache Syndromes In Child Or Adult, Intractable G43.D0 Abdominal Migraine, Not Intractable G43.D1 Abdominal Migraine, Intractable G44.009 Cluster Headache Syndrome, Unspecified, Not Intractable G44.1 Vascular Headache, Not Elsewher...