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

This code signifies a first-degree corrosion injury to the right toe(s) or toenail, where the acute phase of the injury has passed, and the code is being used to report a residual condition or complication arising from the initial corrosion. First-degree corrosion typically involves superficial damage, similar to a first-degree burn, affecting only the outermost layer of skin.

Use this code when documenting a long-term effect or consequence of a past first-degree chemical burn or corrosion to the right toe(s) or toenail. This applies when the patient is presenting for treatment of a scar, chronic pain, nail deformity, or other persistent issue directly attributable to the original corrosion. It should not be used for the initial acute injury.

• Requires an additional code to describe the specific sequela (e.g., scar, chronic pain, nail dystrophy).
• Only use for encounters where the residual effect of the corrosion is being treated, not the active corrosion itself.
• Ensure documentation clearly links the current condition to the past corrosion event on the right toe(s).