Inj r int crtd,intcr w LOC >24 hr w/o ret consc w surv, subs

This code describes a traumatic injury to the intracranial segment of the right internal carotid artery, resulting in a prolonged loss of consciousness exceeding 24 hours, from which the patient has not recovered to their baseline mental status. This indicates a severe and persistent neurological deficit following the initial insult.

This code is appropriate for subsequent encounters when a patient is receiving ongoing care for a severe intracranial right internal carotid artery injury that caused a coma lasting over 24 hours, and they remain in a state of altered consciousness. Documentation should clearly state the specific artery involved, the duration of unconsciousness, and the patient's current neurological status indicating no return to pre-injury conscious level.

• Ensure documentation specifies "right" internal carotid artery and "intracranial portion."
• Verify the duration of loss of consciousness exceeds 24 hours and the patient's current conscious level has not returned to baseline.
• This code is for subsequent encounters; an initial encounter would use the 'A' or 'D' (for active treatment) seventh character.