Chronic tension- type headache , intractable. Chronic leukemia in remission; Leukemia, chronic , in remission. Chronic cluster headache , intractable. Chronic tension-type headache , not intractable. Chronic cluster headache , not intractable. Chronic intractable posttraumatic headache ; Posttraumatic headache , chronic , intractable. Chronic tension- type headache. B Ophthalmoplegic migraine G Use Additional code for adverse effect, if applicable, to identify drug TT50 with fifth or sixth character 5. Cluster headache syndrome, unspecified, not intractable. Showing R50 Fever of other and unknown origin. Tension-type headache , unspecified, not intractable. D0 …… not intractable G Intractable posttraumatic headache ; Posttraumatic headache , intractable.