Corros 90%/more of body surface w 30-39% third degree corros

This code signifies a severe chemical burn, specifically a corrosion, affecting 90% or more of the patient's total body surface area (TBSA). Within this extensive injury, 30-39% of the affected area is characterized by full-thickness tissue destruction, indicating third-degree corrosion. These injuries are critical and often life-threatening due to the extensive tissue damage and systemic effects.

Use this code for patients presenting with chemical burns that meet the specified criteria for both total body surface area involved and the percentage of third-degree involvement. This is typically seen in industrial accidents, chemical spills, or other severe exposure incidents. Documentation must clearly support the extent and depth of the corrosion.

• Ensure the physician's documentation explicitly states both the total body surface area affected by corrosion (90% or more) and the percentage of third-degree involvement (30-39%).
• Do not use this code for thermal burns; this code is specifically for corrosions (chemical burns).
• Always sequence this code as the primary diagnosis when it represents the reason for the encounter, followed by codes for any associated complications or sequelae.