Corros second deg of unsp single finger except thumb, sqla

This code signifies a second-degree chemical burn affecting a single finger, excluding the thumb, where the acute injury has healed but residual effects persist. These sequelae could include scarring, contractures, or chronic pain resulting from the original corrosion.

This code is appropriate when documenting the long-term consequences of a second-degree chemical burn to a single non-thumb finger. It should be used for follow-up encounters addressing these lasting effects, not for the initial acute injury.

• Always use an external cause code (V00-Y99) in conjunction with this code to describe the circumstances of the corrosion.
• Ensure the documentation clearly specifies a second-degree burn and that it's a sequela, not an active injury.
• Verify that the affected digit is a single finger other than the thumb; otherwise, a different code for multiple fingers or the thumb would be more appropriate.