Corros second degree of unsp mult fngr, not inc thumb, sqla

This code signifies a healed or residual effect from a second-degree corrosion (chemical burn) that affected multiple fingers, excluding the thumb, specifically involving the nail or nail bed. The injury is no longer acute but has left a lasting impact, such as scarring, nail deformity, or chronic pain.

Apply this code when documenting a patient presenting with a long-term complication or sequela directly attributable to a past second-degree chemical burn of multiple finger nails (excluding the thumb). This is appropriate for follow-up encounters after the initial acute injury has resolved, and the patient is being treated for the persistent effects.

• Always use with an external cause code to describe the circumstances of the original corrosion.
• Ensure documentation clearly states the injury is a sequela, not an acute or subsequent encounter for the initial burn.
• Verify that the affected digits are multiple fingers, not including the thumb, and the nail is specifically involved.