Corrosion of first degree of buttock, initial encounter

This code signifies a first-degree corrosion (chemical burn) affecting the buttock area. A first-degree corrosion involves only the outermost layer of skin, presenting with redness, mild swelling, and pain, but no blistering or skin loss.

Apply this code when documenting a chemical burn to the buttock that presents as superficial, characterized by erythema and discomfort without blistering. This code is appropriate for the initial treatment or evaluation of such an injury.

• Ensure documentation specifies "corrosion" or "chemical burn" rather than thermal burn.
• Confirm the burn is explicitly described as first-degree and located on the buttock.
• The "XA" seventh character indicates this is the initial encounter for this specific injury.