Question: Encounter notes indicate that one of our providers treated a patient for “CI due to embol, mid-cerebral artery.” What is the correct ICD-10 code for this patient? Idaho Subscriber Answer: The shorthand your provider used points to a cerebral infarction (CI) due to embolism (embol) in the middle cerebral artery (mid-cerebral artery). On the claim, you’ll want to choose from the following ICD-10 codes, depending on location of the embolism: