Corros third degree of single l finger except thumb, subs

This code signifies a full-thickness burn, also known as a third-degree corrosion, affecting a single finger on the left hand, excluding the thumb. The injury involves the entire skin layer and potentially underlying tissues, specifically impacting the nail or surrounding structures. This particular code is used for encounters following the initial treatment of the corrosion.

Apply this code when documenting follow-up care for a patient who previously sustained a third-degree corrosion to a single left finger (excluding the thumb), specifically involving the nail. This includes scenarios such as wound checks, dressing changes, debridement, or assessment of healing progress after the initial acute phase.

• Ensure the documentation clearly specifies "third-degree" or "full-thickness" corrosion and the exact location (single left finger, excluding thumb, involving nail).
• Verify that this is a subsequent encounter for the injury, not the initial treatment.
• Confirm the laterality is explicitly documented as "left."