ICD-10 Code H61.811 – Exostosis of right external canal (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H61.811 – Exostosis of right external canal
What it is
H61.811 identifies a bony overgrowth in the right external auditory canal. It is a localized ear canal exostosis that may narrow the passage and interfere with normal ear function.
Clinical signs
Clinical features vary; refer to documentation. Common findings include a visible bony mass in the right ear canal, canal narrowing, and possible recurrent wax trapping or water retention.
When to use this code
Use this code when the provider documents exostosis of the right external canal or equivalent wording for a right-sided bony ear canal growth. It is appropriate when the diagnosis is confirmed clinically or by otoscopic exam. If the record only mentions ear pain or wax without the bony lesion, check documentation.
Do not use for
Do not use this code for left-sided or bilateral ear canal exostosis, or for nonspecific external ear disorders. Do not assign it when the note does not clearly identify a bony exostosis.
Coding tip
Capture laterality exactly as documented; right ear canal exostosis maps to H61.811, not a bilateral or unspecified code.