Corrosion of unsp degree of unsp toe(s) (nail), init encntr

This code signifies damage to the skin or underlying tissue of an unspecified toe, including the nail, caused by a corrosive substance. The severity of the corrosion is not specified, meaning it could range from a superficial burn to a full-thickness injury.

Use this code when documentation indicates a chemical burn to a toe, but the specific toe (e.g., great toe, second toe) is not identified. It is also appropriate when the degree of the burn (e.g., first, second, third degree) is not documented, and this is the patient's initial presentation for this injury.

• Ensure the documentation explicitly states "unspecified toe" or lacks specific toe identification.
• Only use the "A" (initial encounter) seventh character for the first time the patient is seen for this specific injury.
• If the corrosive agent is known, consider an additional external cause code (e.g., T51-T65 series) to provide further specificity.