ICD-10 Code H61.813 – Exostosis of external canal, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H61.813 – Exostosis of external canal, bilateral
What it is
H61.813 identifies bony overgrowths in both external ear canals. These exostoses can narrow the canals and may be incidental or associated with reduced ear ventilation.
Clinical signs
Clinical features vary; refer to documentation. Common findings include bilateral canal narrowing on otoscopic exam and possible recurrent ear blockage or wax retention.
When to use this code
Use this code when the provider documents exostosis affecting both external auditory canals. It fits confirmed bilateral bony canal overgrowth, whether found during evaluation for hearing complaints or incidentally on exam.
Assign it only when the record clearly states bilateral external canal exostosis. Check documentation if the note describes another ear canal disorder or does not specify laterality.
Do not use for
Do not use this code for unilateral exostosis, external ear infection, or simple cerumen impaction. If the documentation is nonspecific, check documentation.
Coding tip
Verify both laterality and anatomic site in the note before assigning H61.813.