Corrosion of 3rd deg mu sites of unsp ank/ft, sequela

This code signifies a third-degree chemical burn (corrosion) affecting multiple, unspecified areas of the ankle and 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. This indicates a long-term effect or late complication of the original severe chemical burn.

Use this code when documenting a patient encounter for a sequela (e.g., scar contracture, chronic pain, non-healing ulcer, nerve damage) directly attributable to a third-degree corrosion that occurred in the past on multiple sites of the ankle and foot. This code is appropriate when the acute phase of the burn has passed, and the current treatment addresses the lasting consequences.

• Assign this code only for the sequela of a healed third-degree corrosion; do not use for acute burn treatment.
• Ensure documentation clearly links the current condition to a past third-degree chemical burn of the ankle and foot.
• Always use with an additional code to specify the exact nature of the sequela (e.g., scar, contracture, chronic ulcer).