Corrosion of 3rd deg mu sites of unsp wrs/hnd, sequela

This code signifies a severe, full-thickness chemical burn (corrosion) affecting multiple, unspecified sites on the wrist and hand. The injury has progressed to the sequela stage, indicating a long-term complication or residual effect of the initial burn.

Apply this code when documenting the late effects of a third-degree chemical burn to the wrist and hand, where the specific locations on these body parts are not detailed. This would be appropriate for follow-up encounters addressing chronic issues stemming from the original injury, such as scarring, contractures, or nerve damage.

• Always use an external cause code to describe the circumstances of the corrosion.
• Ensure the documentation clearly supports "sequela" and not an active, acute injury.
• Verify that the burn is explicitly described as third-degree and chemical in nature.