Corros second deg of unsp single finger except thumb, init

This code signifies a second-degree chemical burn affecting a single finger, excluding the thumb, and involving the nail or surrounding tissue. A second-degree corrosion indicates damage extending beyond the epidermis into the dermis, characterized by blistering, pain, and redness.

Apply this code when documenting an initial encounter for a patient presenting with a second-degree chemical burn to any single finger (index, middle, ring, or little finger), specifically noting involvement of the nail or nail bed. This would include injuries from strong acids, bases, or other corrosive substances.

• Ensure the documentation specifies "second degree" and "corrosion" (chemical burn) rather than a thermal burn.
• Verify that the affected digit is a single finger other than the thumb.
• Confirm this is the initial treatment for the injury; subsequent encounters would use a different seventh character.