Corros 90%/more of body surface w 60-69% third degree corros

This diagnosis code signifies a severe chemical or thermal injury affecting nearly the entire body surface, specifically 90% or more. Within this extensive injury, a significant portion, between 60% and 69%, is classified as full-thickness tissue destruction, indicating damage through all layers of the skin. This represents a critical and life-threatening condition requiring immediate and intensive medical intervention.

This code is appropriate for documenting patients presenting with widespread corrosive injuries, such as those resulting from chemical spills or extensive thermal exposure, where the total body surface area affected is 90% or greater. It is specifically used when a substantial proportion of this extensive injury, between 60% and 69%, is confirmed to be third-degree in severity. This code should be assigned after a thorough assessment of the patient's total body surface area (TBSA) affected and the depth of the corrosion.

• Ensure documentation clearly specifies both the total body surface area affected (90% or more) and the percentage of third-degree corrosion (60-69%).
• Remember to also code any associated external cause of morbidity (e.g., chemical exposure, fire) to provide a complete picture of the injury.
• Verify that the physician's documentation supports the specific percentages for both total body surface area and third-degree involvement.