Corros third degree of single l finger except thumb, init

This code signifies a full-thickness chemical burn affecting a single finger on the left hand, excluding the thumb, and specifically involving the nail or nail bed. A third-degree corrosion indicates destruction of all skin layers, potentially extending into subcutaneous tissue, muscle, or bone, caused by exposure to a corrosive substance.

Apply this code when documenting a patient's initial presentation for a severe chemical burn to a left finger (other than the thumb), where the damage extends through all skin layers and affects the nail structure. This would be used for the first encounter for treatment of this specific injury.

• Ensure the documentation clearly specifies a corrosion (chemical burn) rather than a thermal burn.
• Verify the laterality (left finger) and that it's a single finger, excluding the thumb.
• Confirm this is the initial encounter for treatment of this specific injury.