I66.03
Billable codeOcclusion and stenosis of bilateral middle cerebral arteries
The ICD-10 code for occlusion and stenosis of bilateral middle cerebral arteries is I66.03.
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
- I66.01Occlusion and stenosis of right middle cerebral artery
- I66.02Occlusion and stenosis of left middle cerebral artery
- I66.09Occlusion and stenosis of unspecified middle cerebral artery
- I66.03Occlusion and stenosis of bilateral middle cerebral arteries
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 43400Approximate match
- 43410Approximate match
- 43490Approximate match
Associated MS-DRGs
I66.03 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