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20.4 Mastoidectomy
Code also any:
skin graft (18.79)
tympanoplasty (19.4-19.55)
Excludes:
that with implantation of cochlear prosthetic device (20.96-20.98)
20.41 Simple mastoidectomy
20.42 Radical mastoidectomy
20.49 Other mastoidectomy
Atticoantrostomy
Mastoidectomy:
NOS
modified radical
 
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