Corros unsp degree of unsp mult fngr (nail), inc thumb, sqla

This code signifies a long-term complication or late effect resulting from a chemical burn of an unspecified severity affecting multiple fingers, including the thumb. The specific nature or extent of the corrosion is not documented, and the injury has healed but left a residual condition.

Apply this code when documenting a sequela (e.g., scar, contracture, chronic pain, functional impairment) directly attributable to a past chemical burn involving multiple fingers and the thumb, where the initial burn's degree was not specified. This code is appropriate when the acute phase of the injury has passed, and the patient is being treated for the lasting effects.

• Always use this code as a secondary diagnosis, following a code that describes the specific sequela.
• Ensure documentation clearly links the current condition to a previous chemical burn of multiple fingers/thumb.
• Verify that the original burn's degree was truly unspecified; otherwise, a more specific sequela code should be chosen.