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

This code signifies a traumatic injury to the intracranial segment of the left internal carotid artery, not specified elsewhere, that resulted in a prolonged loss of consciousness lasting between 6 and 24 hours. The "D" seventh character indicates that this is a subsequent encounter for care after the initial treatment of the injury.

This code is appropriate for follow-up encounters where a patient is receiving ongoing care for a previously diagnosed intracranial left internal carotid artery injury that initially caused a loss of consciousness for 6 to 24 hours. Documentation should clearly state the injury, the specific artery involved, the duration of initial loss of consciousness, and that the encounter is for subsequent care.

• Ensure the documentation specifies the left internal carotid artery and its intracranial portion.
• Verify the duration of loss of consciousness was precisely 6 to 24 hours; other durations require different codes.
• Confirm the encounter is for follow-up care (e.g., medication management, rehabilitation, monitoring) and not the initial treatment or sequelae.