Corrosion of third degree of back of left hand, init encntr

This code signifies a full-thickness skin injury on the back of the left hand, caused by a corrosive substance. The damage extends through all layers of the skin, often involving underlying tissues, and presents with charring, leathery appearance, or deep ulceration. Nerve endings are typically destroyed, resulting in a painless wound.

Apply this code for initial encounters involving chemical burns to the dorsal aspect of the left hand that have resulted in third-degree tissue destruction. This includes injuries from strong acids, bases, or other corrosive agents that have caused irreversible damage to the skin. It is appropriate for the first time the patient is seen for this specific injury.

• Ensure the documentation clearly specifies "third degree" and "corrosion" (chemical burn) to differentiate from thermal burns.
• Verify the exact anatomical location is "back of left hand" and not another part of the hand or arm.
• Confirm this is the initial encounter for this specific injury; subsequent encounters will use different seventh characters.