Corros 3rd deg mu left fingers (nail), inc thumb, sequela

This code signifies a third-degree chemical burn (corrosion) affecting multiple fingers, including the thumb, on the left hand, specifically involving the nail or nail bed. A third-degree burn indicates full-thickness tissue destruction, extending through all layers of the skin and potentially into underlying structures. The "sequela" designation indicates that this code is used for complications or conditions arising as a direct result of the original corrosion, after the acute phase has passed.

This code is appropriate for documenting long-term effects or complications stemming from a third-degree chemical burn to multiple left fingers (including the thumb) and their nails. Examples include chronic pain, scarring, nail deformity, or functional impairment directly attributable to the original injury. It should be used when the patient is presenting for treatment of these lasting consequences, not for the initial acute injury.

• Always assign an external cause code (V00-Y99) to describe the circumstances of the corrosion.
• Do not use this code for acute third-degree burns; instead, use the appropriate acute corrosion code.
• Consider additional codes for specific sequelae, such as scar contracture (L90.5) or chronic pain (G89.-), if applicable and documented.