2008 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.* > 2008 ICD-9-CM Diagnosis 377.51 Disorders of optic chiasm associated with pituitary neoplasms and disorders  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 377.51 can be accessed here. 377.51 is a specific code that can be used to specify a diagnosis 377.51 contains 4 index entries View the ICD-9-CM Volume 1 377.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 377.51: Disorder - see also Disease optic chiasm 377.54 associated with neoplasm NEC 377.52 pituitary 377.51 pituitary disorders 377.51 Lesion(s) chiasmal 377.54 associated with neoplasm NEC 377.52 pituitary 377.51 pituitary disorders 377.51