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2008 ICD-9-CM Procedure 20.79 Other incision, excision and destruction of inner ear A surgical procedure producing an opening from the external auditory canal to the membranous labyrinth, in order to improve conductive hearing loss. The surgical creation of a new opening in the labyrinth of the ear for the restoration of hearing in cases of OTOSCLEROSIS. (Dorland, 27th ed) 20.79 is a specific code that can be used to specify a procedure 20.79 contains 28 index entries View the full ICD-9-CM Volume 3 20.* hierarchy 20.79 also known as: Decompression of labyrinth Drainage of inner ear Fistulization: endolymphatic sac labyrinth Incision of endolymphatic sac Labyrinthectomy (transtympanic) Opening of bony labyrinth Perilymphatic tap 20.79 excludes: biopsy of inner ear (20.32) Index entries containing 20.79: Ablation inner ear (cryosurgery) (ultrasound) 20.79 by injection 20.72 Coagulation, electrocoagulation -- see also Destruction, ear inner 20.79 semicircular canals 20.79 Cryotherapy -- see also Destruction, lesion, by site ear inner 20.79 Decompression endolymphatic sac 20.79 labyrinth 20.79 Destruction inner ear NEC 20.79 by injection 20.72 Drainage ear inner 20.79 Electrocoagulation -- see also Destruction, lesion, by site ear inner 20.79 semicircular canals 20.79 Fistulization endolymphatic sac (for decompression) 20.79 labyrinth (for decompression) 20.79 Incision (and drainage) ear inner 20.79 endolymphatic sac 20.79 Labyrinthectomy (transtympanic) 20.79 Labyrinthotomy (transtympanic) 20.79 Opening bony labyrinth (ear) 20.79 Operation Tack (sacculotomy) 20.79 Osteoclasis 78.70 ear 20.79 Otonecrectomy (inner ear) 20.79 Removal -- see also Excision utricle 20.79 Resection -- see also Excision, by site endaural 20.79 Revision tack operation 20.79 Sacculotomy (tack) 20.79 Tack operation (sacculotomy) 20.79 Tap perilymphatic 20.79 Ultrasound inner ear 20.79 Vestibulotomy 20.79