2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Disorders Of The Eye And Adnexa 360-379 > Disorders Of Optic Nerve And Visual Pathways 377.* > 2006 ICD-9-CM Diagnosis 377.41 Ischemic optic neuropathy View the most recent version of ICD-9-CM 377.41 Ischemic injury to the optic nerve which usually affects the optic disk (optic neuropathy, anterior ischemic) and less frequently the retrobulbar portion of the nerve (optic neuropathy, posterior ischemic). The injury results from occlusion of arterial blood supply which may result from TEMPORAL ARTERITIS; ATHEROSCLEROSIS; COLLAGEN DISEASES; EMBOLI; DIABETES MELLITUS; and other conditions. The disease primarily occurs in the sixth decade or later and presents with the sudden onset of painless and usually severe monocular visual loss. Anterior ischemic optic neuropathy also features optic disk edema with microhemorrhages. The optic disk appears normal in posterior ischemic optic neuropathy. 377.41 is a specific code that can be used to specify a diagnosis 377.41 contains 2 index entries View the ICD-9-CM Volume 1 377.* hierarchy  Index entries containing 377.41: Disorder - see also Disease nerve 349.9 optic 377.49 ischemic 377.41 Neuropathy, neuropathic (see also Disorder, nerve) 355.9 optic 377.39 ischemic 377.41