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

This code signifies a second-degree chemical burn, also known as corrosion, affecting an unspecified toe or toenail, where the acute injury has healed and the patient is now presenting with a residual condition or complication directly resulting from that past burn. This indicates a deeper injury than a first-degree burn, involving the epidermis and part of the dermis, and the current encounter is for a long-term effect.

Use this code when documenting a patient encounter for a sequela (e.g., scarring, chronic pain, nail deformity, restricted movement) of a previously sustained second-degree chemical burn to an unspecified toe or toenail. This code is appropriate when the initial burn has resolved, and the current treatment addresses a lasting consequence. Do not use for the initial treatment of the acute burn.

• Always assign an external cause code (V00-Y99) to describe the circumstances of the corrosion.
• Ensure documentation clearly links the current condition as a direct sequela of a past second-degree chemical burn to the toe.
• Do not use this code for current, active burns; refer to the acute corrosion codes for those instances.