I66.2 – Occlusion and stenosis of posterior cerebral artery
ICD-10-CM 2027 diagnosis code · Cerebrovascular diseases
- Code
I66.2(claims format:I662)- Description
- Occlusion and stenosis of posterior cerebral artery
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 9. Diseases of the circulatory system (I00-I99)
- Block
- I60-I69 Cerebrovascular diseases
- Parent codes
- I66
Billable codes under I66.2
I66.2 is a header code and cannot be used on claims. Choose the most specific code:
- I66.21 – Occlusion and stenosis of right posterior cerebral arteryBillable
- I66.22 – Occlusion and stenosis of left posterior cerebral arteryBillable
- I66.23 – Occlusion and stenosis of bilateral posterior cerebral arteriesBillable
- I66.29 – Occlusion and stenosis of unspecified posterior cerebral arteryBillable
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
I66 – Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
- embolism of cerebral artery
- narrowing of cerebral artery
- obstruction (complete) (partial) of cerebral artery
- thrombosis of cerebral artery
Block I60-I69
- traumatic intracranial hemorrhage (S06.-)
Index terms for I66.2
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in I66
- I66.0 – Occlusion and stenosis of middle cerebral arteryHeader
- I66.1 – Occlusion and stenosis of anterior cerebral arteryHeader
- I66.3 – Occlusion and stenosis of cerebellar arteriesBillable
- I66.8 – Occlusion and stenosis of other cerebral arteriesBillable
- I66.9 – Occlusion and stenosis of unspecified cerebral arteryBillable
Frequently asked questions
What is ICD-10 code I66.2?
I66.2 is the ICD-10-CM code for occlusion and stenosis of posterior cerebral artery, in the block I60-I69 (Cerebrovascular diseases).
Is I66.2 a billable code?
No. I66.2 is a header code with more specific child codes; report one of the billable codes listed above.
What category does I66.2 belong to?
It belongs to category I66 – Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.