Corrosion of second degree of left ear, initial encounter

This code signifies a second-degree chemical burn affecting the left ear, excluding the eardrum. A second-degree corrosion indicates damage extending beyond the epidermis, causing blistering, pain, and potential partial-thickness skin loss.

Apply this code when a patient presents for initial treatment of a chemical burn to the left outer ear or ear canal (not involving the tympanic membrane) that has resulted in blistering or partial-thickness injury. This would include exposures to strong acids, alkalis, or other corrosive substances.

• Ensure the documentation specifies "left ear" and "second degree" corrosion.
• Confirm the eardrum is not involved; if it is, a different code for tympanic membrane corrosion would be appropriate.
• The "A" in the seventh character indicates an initial encounter for this specific injury.