Occlusion and stenosis of unspecified carotid artery

This code signifies a narrowing or blockage of a carotid artery where the specific side (left or right) is not documented. This condition restricts blood flow to the brain and can lead to transient ischemic attacks (TIAs) or stroke. It represents an unspecified carotid artery disease.

Use this code when medical record documentation clearly indicates occlusion or stenosis of a carotid artery, but the laterality (left or right) is not specified. This code is appropriate when the physician's notes, imaging reports, or other diagnostic findings confirm carotid artery disease without identifying the affected side.

• Avoid using this code if laterality (left or right) is documented; instead, use the more specific I65.21 (right) or I65.22 (left).
• Query the provider for clarification of laterality if possible to ensure the most specific code is assigned.
• This code is often used when the documentation states "carotid artery stenosis" without further detail.