Corros 50-59% of body surface w 10-19% third degree corros

This code signifies a severe chemical burn, or corrosion, affecting a significant portion of the patient's total body surface area (TBSA). Specifically, it indicates that between 50% and 59% of the body has sustained corrosion, with a critical subset of this damage (10% to 19% of the TBSA) being full-thickness, or third-degree, corrosion. This level of injury suggests extensive tissue destruction requiring intensive medical intervention.

Apply this code for patients presenting with extensive chemical burns where the total body surface area involved is precisely documented as 50-59%. Crucially, the documentation must also specify that 10-19% of this affected area is classified as third-degree corrosion. This code is appropriate for initial encounters and subsequent care related to the acute injury.

• Ensure documentation clearly differentiates between total body surface area affected by corrosion and the percentage of that area that is third-degree.
• Do not use this code if the percentage of third-degree corrosion falls outside the 10-19% range, even if the total body surface area is 50-59%.
• Always sequence this code first when it represents the primary reason for the encounter, followed by any external cause codes.