Diagnosis Code

I66.8 OCCLUSION AND STENOSIS OF OTHER CEREBRAL ARTERIES


Code Information

Diagnosis Code: I66.8

Short Description: Occlusion and stenosis of other cerebral arteries

Long Description: Occlusion and stenosis of other cerebral arteries

The code I66.8 is VALID for claim submission

Code Classification:

  • Diseases of the circulatory system (I00–I99)
    • Cerebrovascular diseases (I60-I69)
      • Occls and stenosis of cereb art, not rslt in cerebral infrc (I66)
        • I66.8 Occlusion and stenosis of other cerebral arteries

Code Version: 2022 ICD-10-CM


Synonyms

  • Cerebral ischemic stroke due to small artery occlusion
  • Embolus of circle of Willis
  • Ophthalmic artery occlusion
  • Thrombosis of posterior communicating artery

References to Index of Diseases and Injuries

The code I66.8 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Inclusion Terms:
    • Occlusion and stenosis of perforating arteries

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
I66.8 Right Arrow 434.90 Crbl art oc NOS wo infrc

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
I66 Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
I66.0 Occlusion and stenosis of middle cerebral artery
I66.01 Occlusion and stenosis of right middle cerebral artery
I66.02 Occlusion and stenosis of left middle cerebral artery
I66.03 Occlusion and stenosis of bilateral middle cerebral arteries
I66.09 Occlusion and stenosis of unspecified middle cerebral artery
I66.1 Occlusion and stenosis of anterior cerebral artery
I66.11 Occlusion and stenosis of right anterior cerebral artery
I66.12 Occlusion and stenosis of left anterior cerebral artery
I66.13 Occlusion and stenosis of bilateral anterior cerebral arteries
I66.19 Occlusion and stenosis of unspecified anterior cerebral artery
I66.2 Occlusion and stenosis of posterior cerebral artery
I66.21 Occlusion and stenosis of right posterior cerebral artery
I66.22 Occlusion and stenosis of left posterior cerebral artery
I66.23 Occlusion and stenosis of bilateral posterior cerebral arteries
I66.29 Occlusion and stenosis of unspecified posterior cerebral artery
I66.3 Occlusion and stenosis of cerebellar arteries
I66.9 Occlusion and stenosis of unspecified cerebral artery


This page was last updated on: 10/1/2023