ICD-10-CM > H60-H95 > H65-H75 > H71 > H71.2 H71.2 Cholesteatoma of mastoid Non-Billable/Non-Specific Codes H71.20Cholesteatoma of mastoid, unspecified earH71.21Cholesteatoma of mastoid, right earH71.22Cholesteatoma of mastoid, left earH71.23Cholesteatoma of mastoid, bilateral