Corros 90%/more of body surface w 80-89% third degree corros

This code signifies an extremely severe chemical or thermal burn (corrosion) affecting nearly the entire body surface, specifically 90% or more. Within this extensive injury, a very large proportion (80-89%) of the affected area has sustained full-thickness damage, indicating destruction of all skin layers. This represents a critical, life-threatening injury.

Apply this code for patients presenting with widespread chemical or thermal burns covering at least 90% of their total body surface area, where the majority (80-89%) of these burns are classified as third-degree. This code is appropriate for documenting the most severe and extensive corrosion injuries requiring intensive care and specialized burn management.

• Ensure documentation clearly specifies both the total body surface area (TBSA) affected by corrosion and the percentage of that TBSA that is third-degree.
• This code requires precise percentages; do not use if percentages fall outside the 90%+ total and 80-89% third-degree range.
• Always sequence this code first if it represents the primary reason for the encounter or hospitalization.