ICD-10 Code I66.01 - Occlusion and stenosis of right middle cerebral artery

ICD-10-CM Diagnosis Code I66.01

Diagnosis Code: I66.01 (Raw: I6601)

Description: Occlusion and stenosis of right middle cerebral artery

Classification: International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM)

Fiscal Year: 2026

CMS Section 111 Status: Valid for reporting.

Overview & Clinical Details

ICD-10-CM code I66.01 is designated for Occlusion and stenosis of right middle cerebral artery. In medical documentation and insurance billing, this code is utilized to specify medical diagnosis for patient records, reimbursement workflows, and compliance under CMS Section 111 mandatory insurer reporting guidelines.