Corros second deg of unsp single finger except thumb, subs

This code signifies a second-degree corrosion injury affecting a single finger (excluding the thumb) or its nail, where the specific finger is not documented. A second-degree corrosion involves damage to the epidermis and dermis, typically presenting with blistering, pain, and redness.

This code is appropriate for documenting follow-up care for chemical burns to a single, unspecified finger (not the thumb) that have resulted in second-degree tissue damage. It is used when the patient is receiving active treatment for the injury, such as wound care, debridement, or dressing changes, after the initial encounter.

• Ensure documentation clearly indicates a second-degree corrosion and that the encounter is for subsequent care.
• Verify that the affected digit is a finger (not the thumb) and that the specific finger is not identified.
• Always sequence this code after the appropriate external cause code (e.g., chemical exposure).