Corros 80-89% of body surface w 0% to 9% third degree corros

This code signifies a severe chemical burn, or corrosion, affecting a very large portion of the patient's body surface area (80-89%). While extensive, the most severe (third-degree) damage is limited to less than 10% of the total body surface. This indicates a widespread but predominantly superficial or partial-thickness chemical injury.

Apply this code when documentation clearly indicates a chemical burn covering 80% to 89% of the body, and the third-degree component is explicitly stated as 0% to 9%. This is typically seen in industrial accidents, chemical spills, or other significant exposure events. It should be used for initial encounters and subsequent care related to the corrosion.

• Ensure the percentage of total body surface area affected by corrosion is precisely documented as 80-89%.
• Verify that the percentage of third-degree corrosion is specifically noted as 0-9%.
• Always code additional external cause codes to describe the circumstances of the corrosion.