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

This code signifies a first-degree burn injury to the right thumb, specifically affecting the nail, where the acute injury has resolved, but residual effects or complications are still present. A first-degree burn involves only the epidermis, causing redness and mild pain without blistering. The "sequela" indicates that this code is used for late effects of the initial burn.

This code is appropriate for documenting the long-term consequences of a superficial burn to the right thumb nail. Examples include persistent discoloration, nail dystrophy, or sensitivity in the area, months or years after the initial burn event. It should be used when the patient is presenting for treatment or evaluation of these chronic issues, not the initial acute injury.

• Always assign an external cause code (V00-Y99) in conjunction with this code to describe the circumstances of the burn.
• Ensure documentation clearly supports that the current encounter is for a sequela, not an acute or subsequent encounter for the initial burn.
• Verify laterality (right thumb) and the specific degree of the burn (first degree) are accurately documented.