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 > Nonsuppurative Otitis Media And Eustachian Tube Disorders 381.* > 2006 ICD-9-CM Diagnosis 381.81 Dysfunction of eustachian tube View the most recent version of ICD-9-CM 381.81 381.81 is a specific code that can be used to specify a diagnosis 381.81 contains 1 index entry View the ICD-9-CM Volume 1 381.* hierarchy  Index entries containing 381.81: Dysfunction Eustachian tube 381.81