Injury of l int carotid, intcr w LOC of 6-24 hrs, sequela

This code signifies a long-term complication or late effect resulting from a traumatic injury to the intracranial segment of the left internal carotid artery. The initial injury was characterized by a prolonged period of unconsciousness lasting between 6 and 24 hours. This code is used when the acute phase of the injury has passed, and residual effects are being treated.

Apply this code when documenting the sequela of a past traumatic intracranial left internal carotid artery injury, specifically when the initial trauma involved a loss of consciousness for 6 to 24 hours. Documentation should clearly indicate that the current encounter addresses a chronic or residual condition directly attributable to this specific past injury. This code is appropriate for follow-up care, rehabilitation, or management of persistent neurological deficits.

• Always use this code as a secondary diagnosis, following the code for the specific sequela being treated (e.g., hemiplegia, aphasia).
• Ensure documentation explicitly states "sequela" or "late effect" and links the current condition to the past intracranial carotid artery injury with the specified duration of unconsciousness.
• Distinguish from acute injury codes (S06.824A-D) which are used for initial encounters or subsequent encounters during the active treatment phase of the injury.