Traumatic subcutaneous emphysema

This code signifies the presence of air or gas trapped beneath the skin, resulting from a traumatic injury. It indicates a leakage of air from the respiratory system or other air-containing structures into the subcutaneous tissues.

Apply this code when documentation clearly states subcutaneous emphysema as a direct consequence of trauma, such as a rib fracture, pneumothorax, or penetrating wound. Look for physician notes describing crepitus upon palpation and imaging findings confirming air in the subcutaneous space following an injury.

• Always code the underlying traumatic injury first, as subcutaneous emphysema is a manifestation of that trauma.
• Distinguish from iatrogenic subcutaneous emphysema, which would be coded differently.
• Ensure the documentation explicitly links the emphysema to a traumatic event; otherwise, consider other causes.