Corrosion of third degree of left ankle, sequela

This code signifies a permanent complication or late effect resulting from a third-degree corrosive burn (chemical burn) that occurred on the left ankle. This type of injury involves full-thickness destruction of the skin and underlying tissue, and the sequela indicates a residual condition after the acute phase of the burn has healed.

Apply this code when documenting a chronic or residual condition, such as scarring, contracture, chronic pain, or functional impairment, directly attributable to a past third-degree chemical burn of the left ankle. This code is appropriate for follow-up encounters addressing these long-term effects, not for the initial acute injury.

• Always sequence the sequela code first, followed by any additional codes describing the specific nature of the sequela (e.g., scar, contracture).
• Ensure documentation clearly links the current condition to a past third-degree corrosive burn of the left ankle.
• Do not use this code for acute corrosive injuries; use the appropriate acute burn code with the initial encounter or subsequent encounter seventh character.