ICD-10 Code H74.8X3 – Other specified disorders of middle ear and mastoid, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H74.8X3 – Other specified disorders of middle ear and mastoid, bilateral
What it is
This code identifies a bilateral middle ear or mastoid disorder that does not fit a more specific ICD-10-CM diagnosis. Use it when documentation clearly states an other specified condition affecting both sides.
Clinical signs
Clinical features vary; refer to documentation. Findings may include ear discomfort, hearing changes, or abnormal otoscopic or imaging results involving both middle ears or mastoid areas.
When to use this code
Use H74.8X3 when the provider documents a specific bilateral middle ear or mastoid disorder that is not named elsewhere in ICD-10-CM. It is appropriate for charted conditions such as “other specified disorder” or similar wording. Check documentation to confirm bilateral involvement.
Do not use for
Do not use this code when a more specific diagnosis is documented, such as acute infection, cholesteatoma, or mastoiditis. Do not assign it if the record does not clearly support a bilateral disorder.
Coding tip
Match the exact provider wording and verify that “bilateral” is documented before selecting H74.8X3.