ICD-9-CM Vol. 3 Procedure Codes →
4. OPERATIONS ON THE EAR (18-20) →
section notes
20 Other operations on middle and inner ear →
section notes
20.9 Other operations on inner and middle ear →
section notes
20.91   Tympanosympathectomy
20.92   Mastoidectomy revision
20.93   Repair oval/round window
20.94   Tympanic injection
20.95   Elecmag hear dev implant
20.96   Implt cochlear prost NOS
20.97   Imp/rep schan coch pros
20.98   Imp/rep mchan cochl pros
20.99   Mid-inner ear ops NEC
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