Injury of l int carotid, intcr w/o LOC, subs

This code signifies a follow-up visit for an injury to the intracranial segment of the left internal carotid artery, not otherwise specified, where the patient did not experience a loss of consciousness at the time of the initial injury. This injury could involve a dissection, rupture, or other trauma to the artery within the skull.

Use this code for subsequent encounters when a patient is receiving active treatment or follow-up care for a previously diagnosed intracranial left internal carotid artery injury without loss of consciousness. Documentation should clearly indicate the left side, intracranial location, the absence of loss of consciousness, and that this is not the initial treatment encounter.

• Ensure documentation specifies "left" internal carotid artery and "intracranial" portion.
• Verify the "D" seventh character is appropriate for subsequent care; "A" is for initial, "S" for sequela.
• Distinguish from injuries to the extracranial portion of the carotid artery, which have different codes.