ICD-10 Code H62.43 – Otitis externa in other diseases classified elsewhere, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H62.43 – Otitis externa in other diseases classified elsewhere, bilateral
What it is
This code identifies bilateral otitis externa that is caused by, or occurs as part of, another disease. Use it when the ear canal inflammation is secondary to an underlying condition rather than a primary ear infection.
Clinical signs
Typical findings include ear canal inflammation in both ears, with pain, itching, redness, swelling, or discharge. Clinical features vary; refer to documentation, especially when the underlying disease is the main focus of care.
When to use this code
Use H62.43 when the provider documents otitis externa in both ears and links it to another disease, such as an underlying systemic or local condition. The note should clearly support a secondary cause. If laterality is not documented, check documentation before coding.
Do not use for
Do not use this code for primary otitis externa with no underlying disease, or when only one ear is affected. Also avoid it if the record does not clearly state that the condition is secondary; check documentation.
Coding tip
Always code the underlying disease first when it is documented as the cause, and add H62.43 only for the bilateral ear involvement.