Corrosion of third degree back of unspecified hand, sequela

This code signifies a third-degree corrosion injury affecting the back of an unspecified hand, where the acute phase of the injury has passed, and the patient is now experiencing long-term complications or residual effects. This type of injury involves full-thickness tissue destruction, including skin, nerves, and potentially underlying structures, due to chemical exposure.

Use this code when documenting a patient presenting with sequelae (e.g., scarring, contractures, chronic pain, functional impairment) from a previously sustained third-degree chemical burn to the back of the hand. This code is appropriate for follow-up encounters after the initial healing of the acute corrosion injury has concluded.

• Always use this code as a secondary diagnosis, following a code that describes the specific sequela (e.g., scar, contracture).
• Ensure documentation clearly indicates the injury is a "corrosion" (chemical burn) and not a thermal burn.
• Verify that the injury location is specifically the "back of the hand" and the laterality is unspecified if not documented.