Lac w/o fb of l bk wl of thorax w penet thor cavity, subs

This code describes a wound to the left posterior chest wall that has breached the thoracic cavity, but does not involve a foreign object. This indicates a significant injury where the lung or other intrathoracic structures may have been compromised.

This code is appropriate for follow-up encounters for a patient who previously sustained a penetrating laceration to the left posterior thorax. This includes visits for wound care, monitoring for complications, or evaluation of healing after the initial treatment.

• Ensure documentation specifies "left back wall of thorax" and "penetration into thoracic cavity."
• Verify this is a "subsequent encounter" and not the initial treatment for the injury.
• Always code any associated organ injury (e.g., pneumothorax, hemothorax) separately.