Unspecified injury of unspecified carotid artery, sequela

This code indicates a long-term complication or residual effect stemming from an injury to an unspecified carotid artery. The original injury itself is not specified, nor is the laterality of the affected artery. This code is used when the acute phase of the injury has passed, and the patient is now experiencing a sequela.

This code is appropriate for documenting conditions such as chronic dissection, pseudoaneurysm, or stenosis that developed as a direct result of a past carotid artery injury, where the specific artery (left/right) was not documented. It should be used when the patient is seen for treatment or evaluation of these persistent effects.

• Always sequence this sequela code after the code for the specific sequela (e.g., I65.21 for carotid artery stenosis).
• Avoid using this code if the laterality of the carotid artery is known; instead, use a more specific code from the S15.0- series.
• Ensure documentation clearly links the current condition to a previous carotid artery injury.