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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Other Disorders Of The Central Nervous System 340-349 > Migraine 346.* > 2007 ICD-9-CM Diagnosis 346.2 Variants of migraine This code may be outdated. View the most recent version of ICD-9-CM 346.2 A syndrome characterized by daily episodes of intense periorbital pain that recur over a period of 6-12 weeks that may be followed by a period of remission of months to years. The pain is non-throbbing, has a duration of 30-60 minutes and tends to occur at night or at regular intervals during the day. Unilateral rhinorrhea, conjunctival injection, lacrimation, facial flushing, and miosis frequently accompany the headaches, which primarily affect young adult males. (Adams et al., Principles of Neurology, 6th ed, p181) 346.2 is a non-specific code that cannot be used to specify a diagnosis 346.2 contains 19 index entries View the ICD-9-CM Volume 1 346.* hierarchy 346.2 also known as: Cluster headache Histamine cephalgia Horton's neuralgia Migraine: abdominal basilar lower half retinal Neuralgia: ciliary migrainous Index entries containing 346.2: Allergy, allergic (reaction) 995.3 migraine 346.2 Bing-Horton syndrome (histamine cephalgia) 346.2 Cephalgia, cephalagia (see also Headache) 784.0 histamine 346.2 Headache 784.0 allergic 346.2 cluster 346.2 histamine 346.2 Histamine cephalgia 346.2 Horton's headache or neuralgia 346.2 Migraine (idiopathic) 346.9 abdominal (syndrome) 346.2 allergic (histamine) 346.2 basilar 346.2 lower-half 346.2 retinal 346.2 variant 346.2 Neuralgia, neuralgic (acute) (see also Neuritis) 729.2 ciliary 346.2 Horton's 346.2 migrainous 346.2 Syndrome - see also Disease abdominal migraine 346.2 Bing-Horton's 346.2