Diffuse otitis externa, unspecified ear

This code signifies a generalized inflammation of the external auditory canal, not localized to a specific area, and without further specification of laterality. It indicates an infection or inflammatory process affecting the skin and subcutaneous tissue of the outer ear canal.

Apply this code when documentation indicates "diffuse otitis externa" without specifying if it affects the right or left ear. This is appropriate when the provider's notes clearly state diffuse inflammation of the external ear canal but omit laterality, or when the condition is bilateral and the provider does not specify individual ear involvement.

• Avoid using this code if laterality (right, left, or bilateral) is documented; instead, select a more specific code.
• Do not use for localized infections like furuncles or cellulitis of the external ear.
• Consider additional codes for any associated symptoms or causative organisms, if documented.