ICD-10 Code H74.8X2 – Other specified disorders of left middle ear and mastoid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H74.8X2 – Other specified disorders of left middle ear and mastoid
What it is
This code identifies a documented disorder affecting the left middle ear or mastoid that does not fit a more specific ICD-10-CM category. Use it when the record names an unusual or otherwise specified condition on the left side.
Clinical signs
Clinical features vary; refer to documentation. Findings may include ear pain, hearing changes, fullness, drainage, or abnormal otoscopic or imaging results, depending on the described disorder.
When to use this code
Use H74.8X2 when the clinician clearly documents a left middle ear or mastoid disorder and no more specific code applies. It is appropriate for unusual, named, or residual conditions that are not classified elsewhere. Check the note for laterality and the exact diagnosis wording.
Do not use for
Do not use this code when a more specific diagnosis is documented, such as otitis media, mastoiditis, or cholesteatoma. Do not use it for unspecified ear disease or when the side is not clearly left.
Coding tip
Code from the exact provider wording and confirm the left-sided documentation before assigning H74.8X2.