20 Other Operations On Middle And Inner Ear 
20.0 Myringotomy 
20.01 Myringotomy with insertion of tube convert 20.01 to ICD-10-PCS
20.09 Other myringotomy convert 20.09 to ICD-10-PCS 20.1 Removal of tympanostomy tube convert 20.1 to ICD-10-PCS 20.2 Incision Of Mastoid And Middle Ear 20.21 Incision of mastoid convert 20.21 to ICD-10-PCS 20.22 Incision of petrous pyramid air cells convert 20.22 to ICD-10-PCS 20.23 Incision of middle ear convert 20.23 to ICD-10-PCS 20.3 Diagnostic Procedures On Middle And Inner Ear 20.31 Electrocochleography convert 20.31 to ICD-10-PCS 20.32 Biopsy of middle and inner ear convert 20.32 to ICD-10-PCS 20.39 Other diagnostic procedures on middle and inner ear convert 20.39 to ICD-10-PCS 20.4 Mastoidectomy 20.41 Simple mastoidectomy convert 20.41 to ICD-10-PCS 20.42 Radical mastoidectomy convert 20.42 to ICD-10-PCS 20.49 Other mastoidectomy convert 20.49 to ICD-10-PCS 20.5 Other Excision Of Middle Ear 20.51 Excision of lesion of middle ear convert 20.51 to ICD-10-PCS 20.59 Other excision of middle ear convert 20.59 to ICD-10-PCS 20.6 Fenestration Of Inner Ear 20.61 Fenestration of inner ear (initial) convert 20.61 to ICD-10-PCS 20.62 Revision of fenestration of inner ear convert 20.62 to ICD-10-PCS 20.7 Incision, Excision, And Destruction Of Inner Ear 20.71 Endolymphatic shunt convert 20.71 to ICD-10-PCS 20.72 Injection into inner ear convert 20.72 to ICD-10-PCS 20.79 Other incision, excision, and destruction of inner ear convert 20.79 to ICD-10-PCS 20.8 Operations on eustachian tube convert 20.8 to ICD-10-PCS 20.9 Other Operations On Inner And Middle Ear 
20.91 Tympanosympathectomy convert 20.91 to ICD-10-PCS 20.92 Revision of mastoidectomy convert 20.92 to ICD-10-PCS 20.93 Repair of oval and round windows convert 20.93 to ICD-10-PCS 20.94 Injection of tympanum convert 20.94 to ICD-10-PCS 20.95 Implantation of electromagnetic hearing device convert 20.95 to ICD-10-PCS 20.96 Implantation or replacement of cochlear prosthetic device, not otherwise specified convert 20.96 to ICD-10-PCS 20.97 Implantation or replacement of cochlear prosthetic device, single channel convert 20.97 to ICD-10-PCS 20.98 Implantation or replacement of cochlear prosthetic device, multiple channel convert 20.98 to ICD-10-PCS 20.99 Other operations on middle and inner ear convert 20.99 to ICD-10-PCS