Corrosion of second degree of left knee, sequela

This code indicates a second-degree chemical burn, also known as corrosion, affecting the left knee. It signifies that the injury is a sequela, meaning it represents a late effect or complication of an initial burn event. The burn involves the epidermis and dermis, characterized by blistering, pain, and redness.

Use this code when documenting a patient presenting with a chronic or residual effect of a second-degree chemical burn to the left knee. This applies to follow-up encounters for complications, scarring, or other long-term issues directly resulting from the original burn. It should be used after the acute phase of the injury has passed.

• Always code the acute burn first, if applicable, using the appropriate T24.x22A code for the initial encounter.
• Ensure documentation clearly supports the "sequela" designation, indicating a late effect rather than an active, acute injury.
• Consider additional codes for any specific complications or conditions arising from the sequela, such as chronic pain or scar contracture.