Corrosion of 3rd deg mu sites of left wrist and hand, subs

This code signifies a severe, full-thickness injury to the skin and underlying tissues of multiple areas on the left wrist and hand, resulting from chemical exposure or other corrosive agents. The damage extends through all layers of the skin, often involving muscle, bone, or nerve, and is being addressed during a follow-up visit after initial treatment.

Apply this code for subsequent encounters where a patient is receiving ongoing care for third-degree corrosion affecting multiple sites of their left wrist and hand. This includes follow-up appointments for wound care, debridement, skin grafting, or monitoring for complications after the initial injury has been addressed.

• Ensure documentation clearly specifies "corrosion" rather than "burn" for appropriate code selection.
• Verify that the encounter is indeed "subsequent" and not the initial treatment for the injury.
• Confirm that multiple sites on the left wrist and hand are affected, as opposed to a single site.