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2008 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 > Otosclerosis 387.* > 2008 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 View the ICD-9-CM Volume 1 387.* hierarchy Index entries containing 387.9: Ossification ear 380.39 middle (see also Otosclerosis) 387.9 Otitis 382.9 insidiosa (see also Otosclerosis) 387.9 Otoporosis (see also Otosclerosis) 387.9 Otosclerosis (general) 387.9 cochlear (endosteal) 387.2 involving otic capsule 387.2 oval window nonobliterative 387.0 obliterative 387.1 round window 387.2 nonobliterative 387.0 obliterative 387.1 specified type NEC 387.8 Otospongiosis (see also Otosclerosis) 387.9