ICD-10 Code H75.80 – Other specified disorders of middle ear and mastoid in diseases classified elsewhere, unspecified ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H75.80 – Other specified disorders of middle ear and mastoid in diseases classified elsewhere, unspecified ear
What it is
This code identifies a specified middle ear or mastoid disorder that is caused by another disease, but the ear side is not documented. Use it when the condition is secondary to an underlying illness and no more precise ear laterality is available.
Clinical signs
Clinical features vary; refer to documentation. Findings may include ear pain, hearing changes, drainage, or mastoid tenderness when the underlying disease affects the middle ear or mastoid.
When to use this code
Use H75.80 when the record states a middle ear or mastoid disorder due to another condition, but does not specify right or left ear. It is appropriate when the provider documents a secondary ear disorder and no more specific code is available.
Check that the underlying disease is documented elsewhere in the chart and coded first when required. If the ear side is identified, choose the laterality-specific code instead.
Do not use for
Do not use this code for primary ear disorders that are not caused by another disease. Do not use it when the documentation identifies a specific ear side or a different, more specific middle ear or mastoid diagnosis.
Coding tip
Verify the causal disease and laterality in the note before assigning H75.80.