Corrosion of first deg mult sites of unsp ank/ft, sequela

This code signifies a first-degree corrosion injury, often a chemical burn, affecting multiple areas of the ankle and foot, where the specific ankle or foot involved is not documented. As a sequela code, it indicates a late effect or complication of the initial corrosion, meaning the acute injury has healed but residual issues persist.

Apply this code when documenting a long-term consequence or scar from a first-degree chemical burn to multiple sites on an unspecified ankle and foot. This would be used after the initial acute phase of the injury has passed and the patient is presenting for treatment of a residual condition directly related to the original corrosion.

• Always use this code as a secondary diagnosis, following a code that describes the specific sequela (e.g., scar, chronic pain).
• Ensure documentation clearly states "sequela" or indicates a late effect of a past corrosion injury.
• Verify that the corrosion is explicitly first-degree and affects multiple, unspecified sites on the ankle and foot.