Corrosion of first degree of left ear, initial encounter

This code signifies a first-degree burn, specifically a corrosion, affecting any part of the left outer ear, excluding the eardrum. A first-degree burn involves only the epidermis, presenting with redness, mild swelling, and pain, but no blistering.

Apply this code for initial encounters where a patient presents with a chemical burn to the left external ear that is superficial. This typically occurs due to contact with a corrosive substance causing epidermal damage.

• Ensure the documentation specifies "corrosion" or "chemical burn" and not a thermal burn.
• Verify the burn is explicitly stated as first-degree and located on the left ear, excluding the tympanic membrane.
• Confirm this is the initial treatment for the injury; subsequent encounters will require a different seventh character.