Corrosion of unspecified degree of left knee, init encntr

This code signifies a chemical burn affecting the left knee, where the specific depth or severity of the injury (e.g., first, second, or third degree) is not documented. It indicates the patient is receiving active treatment for this fresh injury.

Apply this code when a patient presents with a chemical burn to their left knee, and the medical record does not specify the degree of the burn. This is appropriate for the initial visit for treatment of the corrosion.

• Ensure the documentation explicitly states "left knee" and "corrosion" or "chemical burn."
• Only use the "A" seventh character for the initial encounter for active treatment of the injury.
• If the degree of corrosion is specified (e.g., first, second, or third degree), a more specific code from the T24 category should be used.