Corrosion of first deg mult sites of left wrs/hnd, subs

This code indicates a first-degree corrosion, commonly known as a chemical burn, affecting multiple areas of the left wrist and hand. A first-degree corrosion involves only the outermost layer of skin, presenting with redness, mild swelling, and pain, without blistering or skin loss.

This code is appropriate for follow-up encounters where a patient is receiving ongoing care for a superficial chemical burn to the left wrist and hand. This includes situations like wound checks, dressing changes, or medication adjustments during the healing process.

• Ensure the documentation specifies "corrosion" (chemical burn) and not a thermal burn.
• Verify the encounter is "subsequent" as indicated by the 7th character 'D'.
• Confirm that multiple sites on the left wrist and hand are affected, and the burn is indeed first-degree.