Corrosion of second degree of right thumb (nail), sequela

This code indicates a second-degree chemical burn affecting the right thumb, including the nail, where the acute injury has healed and residual effects or complications are now being treated. These sequelae could include scarring, contractures, chronic pain, or nail deformities resulting from the original corrosive exposure.

Apply this code when documenting treatment for long-term complications or residual conditions stemming from a second-degree chemical burn to the right thumb. This is appropriate for follow-up encounters after the initial healing phase of the acute injury.

• Always assign this sequela code in conjunction with an external cause code to fully describe the circumstances of the injury.
• Ensure documentation clearly specifies "sequela" or "late effect" of the corrosion, not an active acute injury.
• Verify the burn degree (second-degree) and specific location (right thumb, including nail) are explicitly stated in the medical record.