I66.8
Billable codeOcclusion and stenosis of other cerebral arteries
The ICD-10 code for occlusion and stenosis of other cerebral arteries is I66.8.
Clinical notes
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Occlusion and stenosis of perforating arteries
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- I66.0Occlusion and stenosis of middle cerebral arterynon-billable header
- I66.1Occlusion and stenosis of anterior cerebral arterynon-billable header
- I66.2Occlusion and stenosis of posterior cerebral arterynon-billable header
- I66.3Occlusion and stenosis of cerebellar arteries
- I66.9Occlusion and stenosis of unspecified cerebral artery
- I66.8Occlusion and stenosis of other cerebral arteries
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 43490Approximate match
Associated MS-DRGs
I66.8 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.
- DRG 061Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent with MCC
- DRG 062Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent with CC
- DRG 063Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent without CC/MCC
- DRG 067Precerebral Occlusion without Infarction with MCC
- DRG 068Precerebral Occlusion without Infarction without MCC