Corrosion of second degree of upper back, sequela

This code indicates a second-degree chemical burn, also known as corrosion, affecting the upper back. A second-degree burn involves damage to the epidermis and dermis, characterized by blistering, pain, and redness. The "sequela" designation signifies that this code is used for complications or conditions arising directly from the original corrosion, after the acute phase of the injury has passed.

This code is appropriate for documenting long-term effects or complications of a second-degree chemical burn to the upper back, such as scar contracture, chronic pain, or persistent skin changes. It should be used when the patient is presenting for treatment of these residual conditions, not for the initial acute injury. This code would be assigned after the initial healing period of the acute burn.

• Always assign an external cause code (V00-Y99) in conjunction with this code to describe the circumstances of the corrosion.
• Do not use this code for acute second-degree chemical burns; use the appropriate acute T21.2- code instead.
• Ensure documentation clearly supports that the condition being treated is a long-term effect or complication of the original corrosion.