Corrosion of second degree of left foot, sequela

This code indicates a second-degree chemical burn affecting the left foot, 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 second-degree burn involves damage to the epidermis and dermis, characterized by blistering, pain, and redness.

Apply this code when documenting a patient encounter for a long-term effect or complication stemming from a previously sustained second-degree chemical burn to the left foot. Examples include scar contractures, chronic pain, or non-healing ulcers that are a direct consequence of the original corrosion. This code is appropriate when the initial burn is no longer acute.

• Always use this code as a secondary diagnosis, following the code for the specific sequela being treated.
• Ensure documentation clearly links the current condition to the past second-degree chemical burn of the left foot.
• Do not use for acute chemical burns; those require codes from the T25.62- series without the "S" suffix.