Corros 3rd deg mu sites of left lower limb, ex ank/ft, subs

This code signifies a full-thickness skin and tissue destruction, extending through all layers of the skin, affecting more than one distinct area of the left lower limb, excluding the ankle and foot. This type of injury is characterized by significant tissue damage, often appearing charred, leathery, or waxy, and typically involves nerve damage resulting in a painless wound.

Apply this code when documenting the follow-up care for a patient with previously diagnosed third-degree corrosion impacting multiple non-contiguous sites on the left lower extremity (e.g., thigh and calf). This code is appropriate for subsequent encounters after the initial treatment of the corrosion, such as during wound care, debridement, or skin grafting procedures.

• Ensure documentation clearly specifies "third degree" and "multiple sites" on the left lower limb, excluding the ankle and foot.
• The "D" seventh character indicates a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.
• Do not use this code for initial treatment of the corrosion; a different seventh character would be required.