ICD-10 Code H74.8X – Other specified disorders of middle ear and mastoid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H74.8X – Other specified disorders of middle ear and mastoid
What it is
This code identifies a documented middle ear or mastoid disorder that does not fit a more specific ICD-10-CM category. Use it when the provider names an “other specified” condition involving these structures.
Clinical signs
Clinical features vary; refer to documentation. Findings may include ear pain, hearing changes, drainage, fullness, or mastoid tenderness, depending on the underlying disorder.
When to use this code
Use this code when the record clearly states a specified middle ear or mastoid condition that is not otherwise classified. It is appropriate when the diagnosis is more specific than “unspecified,” but no dedicated code exists. Check documentation for the exact anatomic site and disorder name.
Do not use for
Do not use this code for common, separately coded conditions such as otitis media, mastoiditis, or cholesteatoma. If the provider documents an unspecified ear disorder, choose the appropriate unspecified code instead.
Coding tip
Code the exact terminology in the note and verify whether a more specific middle ear or mastoid code applies first.