Corrosion of first degree of right knee, sequela

This code signifies a first-degree burn, specifically a corrosion, affecting the right knee, where the acute injury has healed and the patient is now presenting with a residual condition or complication directly resulting from that past corrosion. First-degree burns involve only the epidermis, causing redness and mild pain without blistering.

This code is appropriate when documenting a long-term effect or complication arising from a previously sustained first-degree corrosive burn to the right knee. Examples include persistent discoloration, scarring, or altered sensation in the area after the initial burn has resolved. It should be used when the patient is being treated for the sequela, not the acute injury itself.

• Always assign an external cause code (V00-Y99) to describe the circumstances of the original corrosion.
• Ensure documentation clearly links the current condition to the past first-degree corrosive burn of the right knee.
• Do not use this code for acute first-degree corrosive burns; use the acute injury code instead.