ICD-10 Code H61.31 – Acquired stenosis of external ear canal secondary to trauma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H61.31 – Acquired stenosis of external ear canal secondary to trauma
What it is
H61.31 identifies narrowing of the external ear canal that develops after trauma. Use it when documentation shows an acquired, not congenital, stenosis caused by injury.
Clinical signs
Findings may include a visibly narrowed ear canal, reduced passage on otoscopic exam, and conductive hearing complaints. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record states post-traumatic stenosis of the external auditory canal. It fits cases where prior injury led to scarring or narrowing and the provider documents the condition as acquired. Do not infer trauma unless it is clearly recorded.
Do not use for
Do not use H61.31 for congenital ear canal narrowing or for temporary swelling from acute infection or inflammation. Check documentation if the record does not clearly link the stenosis to trauma.
Coding tip
Verify that the note specifies both acquired stenosis and a traumatic cause before assigning H61.31.