Cereb infrc due to unsp occls or stenos of unsp cereblr art

This code signifies a cerebral infarction (ischemic stroke) affecting the cerebellum, where the specific artery involved is not documented, nor is the precise nature of the occlusion or stenosis. It indicates brain tissue damage due to a lack of blood supply in the posterior circulation, without further anatomical or etiological detail.

Use this code when documentation confirms a cerebellar stroke but lacks specificity regarding the affected cerebellar artery (e.g., superior, anterior inferior, posterior inferior) or the exact cause of the blockage (e.g., thrombosis, embolism, atherosclerosis). This code is appropriate when the physician's notes state "cerebellar infarct, unspecified artery" or "stroke, cerebellum, cause unknown."

• Avoid this code if the specific cerebellar artery (e.g., superior cerebellar artery) is identified; instead, use a more specific I63.5- subcategory.
• Ensure documentation clearly states "cerebellar" to differentiate from cerebral infarcts in other brain regions.
• Always sequence this code after any codes for underlying conditions contributing to the stroke, such as atrial fibrillation or atherosclerosis, if known.