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

This code signifies a third-degree chemical burn (corrosion) affecting multiple areas of the left lower limb, excluding the ankle and foot, where the acute injury has healed and residual effects or complications are now being treated. These sequelae could include scarring, contractures, chronic pain, or functional impairment resulting from the original severe chemical burn.

Apply this code when documenting the long-term consequences or complications of a third-degree corrosion injury to the left lower limb (e.g., thigh, knee, calf) that are no longer in the acute healing phase. This is appropriate for follow-up visits addressing chronic issues directly attributable to the original severe chemical burn.

• Ensure the documentation clearly specifies "third-degree" corrosion and "multiple sites" on the left lower limb, excluding the ankle and foot.
• The "S" seventh character indicates a sequela, meaning the patient is being treated for the residual effects of a healed injury.
• Do not use this code for initial encounters or active treatment of the acute burn; use the appropriate acute burn code for that phase.