Injury of l int carotid, intcr w LOC of 1-5 hrs 59 min, subs

This code signifies a traumatic injury to the intracranial segment of the left internal carotid artery, not specified in more detail, that resulted in a loss of consciousness lasting between one and just under six hours. This particular code is used for follow-up care after the initial treatment of the injury.

This code is appropriate for encounters where a patient is receiving ongoing treatment or follow-up for a previously diagnosed intracranial left internal carotid artery injury with the specified duration of loss of consciousness. Documentation should clearly indicate the "subsequent encounter" status and the specific duration of the loss of consciousness from the initial injury.

• Ensure documentation explicitly states "subsequent encounter" for this specific injury.
• Verify the laterality (left) and the intracranial portion of the internal carotid artery are clearly documented.
• Confirm the duration of loss of consciousness falls precisely within the 1 hour to 5 hours 59 minutes range; other durations require different codes.