Corrosion of unsp degree of unsp thumb (nail), subs encntr

This code indicates a chemical burn of an unspecified degree affecting the thumb, including the nail, when the patient is receiving follow-up care after the initial treatment. It signifies ongoing management or healing of the corrosion.

Apply this code for subsequent encounters when a patient presents for continued treatment, wound care, or evaluation of a chemical burn to their thumb. This includes situations where the initial injury has been addressed, but the patient is still under active care for the corrosion.

• Requires an external cause code (V00-Y99) to describe the circumstances of the injury.
• Do not use for initial treatment of the burn; refer to codes ending in 'A'.
• Specificity regarding the degree of corrosion and laterality of the thumb should be sought if available in the documentation.