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2007 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.* > 2007 ICD-9-CM Diagnosis 377.23 Coloboma of optic disc  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 Therefore, this code may be out of date.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 377.23 can be accessed here. 377.23 is a specific code that can be used to specify a diagnosis 377.23 contains 1 index entry View the ICD-9-CM Volume 1 377.* hierarchy Index entries containing 377.23: Coloboma NEC 743.49 optic disc (congenital) 743.57 acquired 377.23