Corrosion of first degree of left knee, subsequent encounter

This code signifies a first-degree burn, also known as a superficial burn, affecting the left knee. This type of burn involves only the outermost layer of skin, the epidermis, and typically presents with redness, mild swelling, and pain, without blistering.

This code is appropriate for follow-up care of a superficial burn to the left knee. This includes subsequent visits for wound checks, pain management, or assessment of healing after the initial treatment. It should be used when the patient is still receiving active treatment for the burn.

• Ensure the documentation specifies "first degree" or "superficial" and clearly identifies the left knee as the affected site.
• The "D" seventh character indicates a subsequent encounter, meaning the patient is receiving routine care during the healing phase.
• Do not use this code for initial treatment of the burn or for sequelae (late effects) once the burn has healed.