ICD-10 Code H62.40 – Otitis externa in other diseases classified elsewhere, unspecified ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H62.40 – Otitis externa in other diseases classified elsewhere, unspecified ear
What it is
This code identifies otitis externa affecting an unspecified ear when it is caused by another underlying disease. Use it when the external ear canal inflammation is documented as secondary, not primary.
Clinical signs
Typical findings include ear canal redness, swelling, itching, pain, or discharge. Clinical features vary; refer to documentation for the underlying condition and the affected ear.
When to use this code
Use H62.40 when the record states otitis externa is due to another disease and does not specify right or left ear. The chart should link the ear infection to the causative condition. If the cause is unclear, check documentation before assigning this code.
Do not use for
Do not use this code for primary otitis externa or for a specified ear when laterality is documented. Do not apply it if the note does not support an underlying disease relationship.
Coding tip
Verify both the secondary cause and the unspecified ear before coding H62.40.