Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction Includes:embolism of precerebral arterynarrowing of precerebral arteryobstruction (complete) (partial) of precerebral arterythrombosis of precerebral arteryExcludes1insufficiency, NOS, of precerebral artery (G45.-)insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)