Primary blast inj brain, NEC LOC of unsp duration, init

This code signifies a brain injury resulting from a primary blast wave, where the specific type of brain injury is not further categorized. The patient experienced a period of unconsciousness, but the duration of this loss of consciousness was not documented. This represents the initial treatment for this specific injury.

Apply this code when documentation clearly states a primary blast injury to the brain, without further specification of the injury type (e.g., diffuse axonal injury, contusion). It is appropriate for the first encounter for this injury when loss of consciousness occurred, but its duration is unknown. Supporting documentation must confirm the blast mechanism and initial encounter.

• Ensure documentation specifies "primary blast injury" and not a secondary or tertiary blast effect.
• Only use this code for the initial encounter for treatment of this specific injury. Subsequent encounters will require a different seventh character.
• Do not use if the duration of loss of consciousness is known and documented; instead, select a more specific code.