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 > ICD-9-CM Diagnosis 387 Otosclerosis The formation of spongy bone in the labyrinth capsule. The ossicles can become fixed and unable to transmit sound vibrations, thereby causing deafness. 387 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 387.0 Otosclerosis involving oval window nonobliterative 387.0 is a specific code that can be used to specify a diagnosis 387.0 contains 2 index entries ICD-9-CM Diagnosis 387.1 Otosclerosis involving oval window obliterative 387.1 is a specific code that can be used to specify a diagnosis 387.1 contains 2 index entries ICD-9-CM Diagnosis 387.2 Cochlear otosclerosis 387.2 is a specific code that can be used to specify a diagnosis 387.2 contains 3 index entries ICD-9-CM Diagnosis 387.8 Other otosclerosis 387.8 is a specific code that can be used to specify a diagnosis 387.8 contains 2 index entries ICD-9-CM Diagnosis 387.9 Otosclerosis unspecified The formation of spongy bone in the labyrinth capsule. The ossicles can become fixed and unable to transmit sound vibrations, thereby causing deafness. 387.9 is a specific code that can be used to specify a diagnosis 387.9 contains 5 index entries