I63.21 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
Short description: Cerebral infrc due to unsp occls or stenosis of verteb art
The 2023 edition of ICD-10-CM I63.21 became effective on October 1, 2022.
This is the American ICD-10-CM version of I63.21 – other international versions of ICD-10 I63.21 may differ.