Cereb infrc d/t unsp occls or stenos of bi middle cereb art

This code signifies a cerebral infarction (ischemic stroke) resulting from the narrowing or blockage of both middle cerebral arteries, where the specific cause of the occlusion or stenosis is not documented. It indicates brain tissue death due to insufficient blood flow to areas supplied by these major arteries.

Apply this code when medical record documentation clearly states a bilateral middle cerebral artery infarction due to an unspecified occlusion or stenosis. This is appropriate when imaging (e.g., MRI, CT) confirms infarction and the physician's diagnosis explicitly links it to bilateral MCA involvement without specifying the etiology of the blockage (e.g., atherosclerosis, embolism).

• Ensure documentation specifies bilateral involvement of the middle cerebral arteries.
• Only use this code when the cause of the occlusion/stenosis is truly "unspecified" by the provider. If a specific cause (e.g., atherosclerosis, embolism) is documented, a more specific code should be used.
• Always sequence this code after any acute stroke codes (e.g., I63.x) if applicable, following ICD-10-CM sequencing guidelines for acute cerebrovascular events.