In simple words: This code indicates a severe chemical burn on the forearm, and the patient is receiving ongoing treatment for it. The burn has gone through all the layers of skin and possibly into deeper tissue.

This code describes a third-degree corrosion (full-thickness skin loss with deep necrosis of underlying tissue) affecting the forearm. The laterality (right or left) is not specified. The "subsequent encounter" designation indicates this is not the first visit for this injury and that the patient is receiving active treatment for this condition.

Example 1: A patient who previously suffered a chemical burn to their forearm returns for a follow-up appointment to have the wound redressed and assessed for healing., A patient was previously treated in the ER for a chemical burn and now presents to their primary physician for ongoing wound care of the third-degree burn on their forearm., A patient had a skin graft two weeks ago to address the full-thickness corrosion on their forearm. They are now seen by the surgeon for a postoperative follow-up visit.

Documentation should specify the degree of the corrosion, the location (forearm), laterality if known, and that this is a subsequent encounter for the same injury. Details of the initial injury and the current treatment should be recorded.

** The code specifically indicates a "corrosion," suggesting a chemical burn rather than a thermal burn. Distinguishing between right and left forearm or specifying "unspecified" is important for accurate coding. The 7th character "D" confirms this as a subsequent encounter.