ICD-10 Code H62.4 – Otitis externa in other diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H62.4 – Otitis externa in other diseases classified elsewhere
What it is
This code identifies otitis externa that is caused by, or occurs as a manifestation of, another underlying disease. Use it when the ear canal inflammation is secondary to a documented condition rather than a primary ear disorder.
Clinical signs
Typical findings include inflammation of the external ear canal, with pain, itching, swelling, or discharge. Clinical features vary; refer to documentation for the underlying disease and any confirmed ear findings.
When to use this code
Use H62.4 when the record clearly links otitis externa to another disease, such as a systemic or local condition documented by the clinician. Make sure the note supports a secondary cause and not an uncomplicated, primary otitis externa. If the relationship is unclear, check documentation.
Do not use for
Do not use this code for routine otitis externa without an associated underlying disease. Also avoid it when the chart does not document a causal link between the ear condition and the other disease.
Coding tip
Always code the underlying disease first when documentation supports causation, and use H62.4 only for the secondary ear manifestation.