Cerebral infarction due to thrombosis of oth cerebral artery

This code signifies a stroke resulting from a blockage in a cerebral artery other than the carotid or vertebral arteries, caused by a blood clot forming within that vessel. This leads to tissue death in the brain due to insufficient blood supply.

Apply this code when documentation clearly indicates an ischemic stroke due to a thrombotic occlusion of a cerebral artery not specified as carotid or vertebral. Supporting documentation would include imaging reports (e.g., MRI, CT scan) confirming infarction and physician notes detailing the etiology and location.

• Ensure the documentation specifies "thrombosis" as the cause, not an embolism from a distant source.
• Distinguish from infarctions due to occlusion of precerebral arteries (e.g., carotid, vertebral), which have different codes.
• Always sequence this code after any acute stroke codes (e.g., I63.x) if applicable, and before any sequelae codes.