Leakage of carotid arterial graft (bypass), sequela

This code signifies a long-term complication involving the leakage of a carotid arterial graft, which was previously implanted to bypass a narrowed or blocked carotid artery. This leakage indicates a persistent or late-onset failure of the graft integrity, potentially leading to recurrent cerebrovascular events or other serious sequelae.

Use this code when documenting a patient presenting with symptoms or findings directly attributable to a past carotid arterial graft leakage, such as new or worsening neurological deficits, pulsatile masses, or imaging evidence of extravasation from the graft. This code is appropriate for conditions that are the residual effects or late complications of the initial leakage event.

• Requires a seventh character "S" to indicate sequela, meaning the condition is a late effect of the initial leakage.
• Do not use for acute or initial presentations of carotid arterial graft leakage; those would typically use the "A" or "D" seventh characters.
• Always code the specific manifestation of the sequela (e.g., neurological deficit) first, followed by this code as a secondary diagnosis.