ICD-10 Code H74.92 – Unspecified disorder of left middle ear and mastoid (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H74.92 – Unspecified disorder of left middle ear and mastoid
What it is
H74.92 identifies a nonspecific disorder affecting the left middle ear and mastoid. Use it when the record confirms a left-sided ear or mastoid problem but does not name a more specific diagnosis.
Clinical signs
Clinical features vary; refer to documentation. You may see ear pain, hearing changes, fullness, drainage, or mastoid tenderness, but the chart must support the left-sided middle ear or mastoid involvement.
When to use this code
Use this code when the provider documents an unspecified disorder of the left middle ear or mastoid and no more detailed condition is available. It can fit incomplete assessments, nonspecific imaging findings, or vague follow-up notes. Check documentation before assigning it.
Do not use for
Do not use H74.92 when a specific left ear diagnosis is documented, such as otitis media, cholesteatoma, or mastoiditis. Also avoid it if the problem is bilateral or right-sided.
Coding tip
If the note is vague, query for the exact left ear diagnosis before defaulting to an unspecified code.