H74.8Other specified disorders of middle ear and mastoid

H74.8 is the ICD-10-CM diagnosis code for other specified disorders of middle ear and mastoid. It belongs to category H74 (other disorders of middle ear mastoid), block H65-H75 (diseases of middle ear and mastoid) and chapter 8 (diseases of the ear and mastoid process). It is a header code, so it can't be reported by itself; one of its 1 subcodes must be used instead.

Within H74, choose H74.8 (Other specified disorders of middle ear and mastoid) only when documentation doesn't support a more specific option: Tympanosclerosis (H74.0), adhesive middle ear disease (H74.1), Discontinuity and dislocation of ear ossicles (H74.2), other acquired abnormalities of ear ossicles (H74.3), polyp of middle ear (H74.4) and unspecified disorder of middle ear and mastoid (H74.9).

To report this condition, pick the subcode that matches the documentation: H74.8X (mastoid).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.