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

This code signifies a severe chemical burn affecting multiple areas of the patient's left lower limb, excluding the ankle and foot. The injury involves full-thickness tissue destruction, extending through all layers of the skin and potentially into underlying structures.

Apply this code for initial encounters when documenting a third-degree corrosion injury to the left thigh, knee, or calf, or any combination of these sites. This is appropriate for chemical exposures resulting in extensive tissue necrosis.

• Ensure the documentation specifies "corrosion" (chemical burn) rather than a thermal burn.
• Verify the laterality is "left" and the specific lower limb sites involved exclude the ankle and foot.
• Confirm this is the initial treatment for the injury; subsequent encounters will require different seventh characters.