Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction I66-

Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as I66. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • Occlusion and stenosis of cerebral artery causing cerebral infarction (
    ICD-10-CM Diagnosis Code I63.3

    Cerebral infarction due to thrombosis of cerebral arteries

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    I63.3-
    ICD-10-CM Diagnosis Code I63.5

    Cerebral infarction due to unspecified occlusion or stenosis of cerebral arteries

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    I63.5
    )
Includes
Includes Help
"Includes" further defines, or give examples of, the content of the code or category.
  • embolism of cerebral artery
  • narrowing of cerebral artery
  • obstruction (complete) (partial) of cerebral artery
  • thrombosis of cerebral artery
Codes
  • 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
    • I66.8 Occlusion and stenosis of other cerebral arteries
    • I66.9 Occlusion and stenosis of unspecified cerebral artery