Corrosion of third degree of chin, sequela

This code signifies a past, resolved third-degree corrosive injury (e.g., chemical burn) to the chin, where the residual effects or complications of that injury are currently being treated or evaluated. Third-degree corrosions involve full-thickness destruction of the skin and underlying tissue.

Use this code when documenting the long-term consequences or sequelae of a severe chemical burn to the chin, such as scarring, contractures, disfigurement, or chronic pain, after the initial acute injury has healed. This code is appropriate when the patient is presenting for treatment or management of these lasting effects.

• Requires a seventh character 'S' for sequela, indicating the late effects of the injury.
• Always sequence this code after the code(s) describing the specific sequela being treated (e.g., scar, contracture).
• Do not use for acute corrosive injuries; those require codes from the initial encounter or subsequent encounter categories.