Diffuse otitis externa, left ear

This code signifies a widespread inflammation or infection of the external auditory canal of the left ear. It involves the skin and subcutaneous tissue of the outer ear canal, often presenting with symptoms like pain, itching, discharge, and hearing changes.

Use this code when documentation specifies a diagnosis of diffuse otitis externa affecting the left ear. Supporting documentation should clearly indicate the laterality and the generalized nature of the inflammation within the external ear canal.

• Ensure documentation explicitly states "left ear" and "diffuse" to support this specific code.
• Distinguish from localized otitis externa (e.g., furuncle) which has different codes.
• Do not use if the infection is described as bilateral; a separate code for bilateral involvement exists.