Cerebral infarction due to thombos unsp precerebral artery

This code signifies a stroke caused by a blood clot forming in an artery that supplies blood to the brain, but the specific precerebral artery (e.g., carotid, vertebral) is not documented. It indicates ischemic damage to brain tissue resulting from this thrombotic event.

Use this code when the medical record clearly states a cerebral infarction due to thrombosis, but the physician's documentation does not specify which precerebral artery was affected. This is appropriate when imaging or clinical findings confirm a thrombotic stroke, but the precise vessel is unknown or unstated.

• Do not use this code if the specific precerebral artery (e.g., carotid, vertebral) is identified; instead, use a more specific I63.0- subcategory.
• Ensure documentation explicitly states "thrombosis" as the cause of the infarction, not embolism or other etiologies.
• Always review the entire medical record for more specific information regarding the affected artery before defaulting to "unspecified."