Is I66.1 a billable code?
No. I66.1 is a header code that groups 4 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
I66.1: Occlusion and stenosis of anterior cerebral artery
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
I66.1 groups related diagnoses under occlusion and stenosis of anterior cerebral artery. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
Billable codes under I66.1
- I66.11Occlusion and stenosis of right anterior cerebral artery
- I66.12Occlusion and stenosis of left anterior cerebral artery
- I66.13Occlusion and stenosis of bilateral anterior cerebral arteries
- I66.19Occlusion and stenosis of unspecified anterior cerebral artery
Other codes in I66 Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
I66.1 questions
What does I66.1 mean?
I66.1 is the ICD-10-CM code for Occlusion and stenosis of anterior cerebral artery. It is in chapter 9, Diseases of the circulatory system (I00-I99).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.