Corrosion of first degree of left axilla, initial encounter

This code signifies a superficial burn to the left armpit area, characterized by redness and pain without blistering or skin breakage. It indicates damage limited to the outermost layer of the skin (epidermis) due to chemical exposure.

Apply this code when documenting an initial presentation of a first-degree chemical burn affecting the left axilla. This is appropriate for cases where the patient is receiving active treatment for the corrosion.

• Ensure the documentation specifies "first degree" and "left axilla" for accurate code assignment.
• Verify the cause is chemical (corrosion) rather than thermal (burn) to differentiate from T22.142A.
• Confirm this is the initial encounter for this specific injury; subsequent care would use a different seventh character.