Primary blast inj brain, NEC LOC of 1-5 hrs 59 min, init

This diagnosis code signifies a traumatic brain injury resulting from a primary blast wave, specifically when the patient experienced a loss of consciousness (LOC) lasting between 1 hour and 5 hours 59 minutes. It is used for the initial treatment encounter for this specific injury type. This code excludes other forms of brain injury or blast-related trauma not directly affecting the brain.

This code is appropriate for patients presenting with a primary blast injury to the brain, documented by a history of exposure to a blast event and neurological assessment confirming a LOC within the specified timeframe. Documentation should clearly state "primary blast injury" and the duration of unconsciousness. This code is used for the initial phase of care, such as in the emergency department or during the initial hospitalization.

• Ensure documentation explicitly states "primary blast injury" and not just "blast injury" to differentiate from secondary or tertiary blast effects.
• Verify the exact duration of loss of consciousness; codes vary significantly based on LOC duration.
• This code is for the initial encounter only; subsequent encounters for the same injury will require a different seventh character.