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

This code signifies a chemical injury, specifically corrosion, affecting the right thumb or thumbnail, where the exact degree of tissue damage is not specified. It indicates that the patient is presenting for follow-up care or treatment for an injury that occurred previously.

Use this code for patients presenting for subsequent care of a corrosive burn to the right thumb or thumbnail, such as wound checks, dressing changes, or ongoing management after initial treatment. It is appropriate when the medical record documents a chemical burn but does not specify the depth or extent of the injury.

• Ensure documentation clearly indicates the right thumb/thumbnail and a corrosive agent as the cause.
• This code is for subsequent encounters; use an acute encounter code for the initial presentation of the injury.
• Always sequence an external cause code (e.g., T20-T25 with a 7th character for corrosion) to fully describe the circumstances of the injury.