Corrosion of first degree of unsp toe(s) (nail), sequela

This code signifies a first-degree burn injury to an unspecified toe or toenail, where the acute injury has healed and the patient is now presenting for treatment of a residual condition or complication directly resulting from that past burn. A first-degree burn involves only the epidermis, causing redness and mild pain without blistering.

Utilize this code when documenting a patient encounter for a long-term effect or complication stemming from a previously sustained first-degree corrosion of an unspecified toe or toenail. Examples include persistent discoloration, altered nail growth, or chronic sensitivity in the affected area, where the initial burn event is no longer acute.

• This "S" code indicates a sequela, meaning the patient is being treated for a residual effect of a past injury, not the acute injury itself.
• Always sequence this sequela code after the code(s) describing the specific residual condition being treated.
• Ensure documentation clearly links the current condition to the past first-degree corrosion of the toe(s) or nail.