2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Diseases Of The Ear And Mastoid Process 380-389 > Disorders Of External Ear 380.* > 2006 ICD-9-CM Diagnosis 380.5 Acquired stenosis of external ear canal View the most recent version of ICD-9-CM 380.5 380.5 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 380.* hierarchy Alternate Terminology Collapse of external ear canal