H74.9 - Unspecified disorder of middle ear and mastoid H74 - Other disorders of middle ear mastoid H74.9 - Unspecified disorder of middle ear and mastoid
H74.90 - Unspecified disorder of middle ear and mastoid, unspecified ear H74.91 - Unspecified disorder of right middle ear and mastoid H74.92 - Unspecified disorder of left middle ear and mastoid H74.93 - Unspecified disorder of middle ear and mastoid, bilateral