ICD-10-CM > H60-H95 > H65-H75 > H74 > H74.8 H74.8 Other specified disorders of middle ear and mastoid Non-Billable/Non-Specific Codes H74.8XOther specified disorders of middle ear and mastoidH74.8X1Other specified disorders of right middle ear and mastoidH74.8X2Other specified disorders of left middle ear and mastoidH74.8X3Other specified disorders of middle ear and mastoid, bilateralH74.8X9Other specified disorders of middle ear and mastoid, unspecified ear