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

This code signifies a brain injury resulting from a primary blast wave, specifically when the patient experienced a loss of consciousness lasting between one hour and five hours and fifty-nine minutes. The "sequela" seventh character indicates that this code is used for complications or conditions arising as a direct result of the initial blast injury, after the acute phase has passed.

Apply this code when documenting a long-term neurological deficit or other lasting consequence directly attributable to a primary blast injury of the brain, where the initial loss of consciousness was precisely within the 1 to 5 hour 59 minute timeframe. Documentation must clearly state the cause as a primary blast injury, the duration of unconsciousness, and that the encounter is for a sequela.

• Ensure documentation explicitly states "primary blast injury" to differentiate from other traumatic brain injuries.
• Verify the exact duration of loss of consciousness; this specific code requires 1 hour to 5 hours 59 minutes.
• The "S" seventh character mandates that this code is used for residual effects or complications, not the initial acute injury.