Acute chemical otitis externa, bilateral

This code signifies an acute inflammatory condition of the external ear canal affecting both ears, specifically caused by exposure to a chemical irritant. This irritation leads to symptoms such as pain, itching, redness, and swelling in the external auditory canal.

Apply this code when documentation clearly indicates a bilateral acute otitis externa resulting from contact with a chemical substance (e.g., certain ear drops, hair products, or industrial chemicals). The physician's notes should specify the chemical etiology and the acute nature of the inflammation.

• Ensure the documentation explicitly states "chemical" as the cause and "bilateral" involvement.
• Differentiate from other forms of otitis externa (e.g., infectious, allergic) which have distinct codes.
• Consider an external cause code (V00-Y99) if the specific chemical exposure and circumstances are known and documented.