Primary blast injury of brain, NEC without LOC, init

This code signifies a brain injury resulting from the direct impact of a blast wave, not due to secondary projectiles or falls. It specifically applies when the patient did not experience any loss of consciousness following the primary blast event. This injury is distinct from other forms of traumatic brain injury.

Use this code for patients presenting with neurological symptoms or findings directly attributable to a primary blast wave, such as headache, dizziness, or cognitive changes, without any documented period of unconsciousness. Documentation should clearly state the mechanism of injury as a primary blast and confirm the absence of loss of consciousness.

• Ensure documentation explicitly states "primary blast injury" and "no loss of consciousness."
• Do not use this code if the brain injury is due to secondary blast effects (e.g., impact from debris) or tertiary effects (e.g., being thrown against a surface).
• Always sequence this code first if it is the primary reason for the encounter.