Use additional code to identify presence of:
alcohol abuse and dependence (F10.-)
exposure to environmental tobacco smoke (Z77.22)
history of tobacco dependence (Z87.891)
hypertension (I10-I1A)
occupational exposure to environmental tobacco smoke (Z57.31)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Excludes1

  • traumatic intracranial hemorrhage (S06.-)
  1. I63 Cerebral infarction

    Use additional code, if applicable, to identify status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82)
    code, if known, to indicate National Institutes of Health Stroke Scale (NIHSS) score (R29.7-)

    Includes:

    • occlusion and stenosis of cerebral and precerebral arteries, resulting in cerebral infarction

    Excludes1

    • neonatal cerebral infarction (P91.82-)

    Excludes2

    • chronic, without residual deficits (sequelae) (Z86.73)
    • sequelae of cerebral infarction (I69.3-)
    1. I63.0 Cerebral infarction due to thrombosis of precerebral arteries

      1. I63.00 Cerebral infarction due to thrombosis of unspecified precerebral artery

      2. I63.01 Cerebral infarction due to thrombosis of vertebral artery

        • I63.011 Cerebral infarction due to thrombosis of right vertebral artery
        • I63.012 Cerebral infarction due to thrombosis of left vertebral artery
        • I63.013 Cerebral infarction due to thrombosis of bilateral vertebral arteries
        • I63.019 Cerebral infarction due to thrombosis of unspecified vertebral artery
      3. I63.02 Cerebral infarction due to thrombosis of basilar artery

      4. I63.03 Cerebral infarction due to thrombosis of carotid artery

        • I63.031 Cerebral infarction due to thrombosis of right carotid artery
        • I63.032 Cerebral infarction due to thrombosis of left carotid artery
        • I63.033 Cerebral infarction due to thrombosis of bilateral carotid arteries
        • I63.039 Cerebral infarction due to thrombosis of unspecified carotid artery
      5. I63.09 Cerebral infarction due to thrombosis of other precerebral artery

    2. I63.1 Cerebral infarction due to embolism of precerebral arteries

      1. I63.10 Cerebral infarction due to embolism of unspecified precerebral artery

      2. I63.11 Cerebral infarction due to embolism of vertebral artery

        • I63.111 Cerebral infarction due to embolism of right vertebral artery
        • I63.112 Cerebral infarction due to embolism of left vertebral artery
        • I63.113 Cerebral infarction due to embolism of bilateral vertebral arteries
        • I63.119 Cerebral infarction due to embolism of unspecified vertebral artery
      3. I63.12 Cerebral infarction due to embolism of basilar artery

      4. I63.13 Cerebral infarction due to embolism of carotid artery

        • I63.131 Cerebral infarction due to embolism of right carotid artery
        • I63.132 Cerebral infarction due to embolism of left carotid artery
        • I63.133 Cerebral infarction due to embolism of bilateral carotid arteries
        • I63.139 Cerebral infarction due to embolism of unspecified carotid artery
      5. I63.19 Cerebral infarction due to embolism of other precerebral artery

    3. I63.2 Cerebral infarction due to unspecified occlusion or stenosis of precerebral arteries

      1. I63.20 Cerebral infarction due to unspecified occlusion or stenosis of unspecified precerebral arteries

      2. I63.21 Cerebral infarction due to unspecified occlusion or stenosis of vertebral arteries

        • I63.211 Cerebral infarction due to unspecified occlusion or stenosis of right vertebral artery
        • I63.212 Cerebral infarction due to unspecified occlusion or stenosis of left vertebral artery
        • I63.213 Cerebral infarction due to unspecified occlusion or stenosis of bilateral vertebral arteries
        • I63.219 Cerebral infarction due to unspecified occlusion or stenosis of unspecified vertebral artery
      3. I63.22 Cerebral infarction due to unspecified occlusion or stenosis of basilar artery

      4. I63.23 Cerebral infarction due to unspecified occlusion or stenosis of carotid arteries

        • I63.231 Cerebral infarction due to unspecified occlusion or stenosis of right carotid arteries
        • I63.232 Cerebral infarction due to unspecified occlusion or stenosis of left carotid arteries
        • I63.233 Cerebral infarction due to unspecified occlusion or stenosis of bilateral carotid arteries
        • I63.239 Cerebral infarction due to unspecified occlusion or stenosis of unspecified carotid artery
      5. I63.29 Cerebral infarction due to unspecified occlusion or stenosis of other precerebral arteries

    4. I63.3 Cerebral infarction due to thrombosis of cerebral arteries

      1. I63.30 Cerebral infarction due to thrombosis of unspecified cerebral artery

      2. I63.31 Cerebral infarction due to thrombosis of middle cerebral artery

        • I63.311 Cerebral infarction due to thrombosis of right middle cerebral artery
        • I63.312 Cerebral infarction due to thrombosis of left middle cerebral artery
        • I63.313 Cerebral infarction due to thrombosis of bilateral middle cerebral arteries
        • I63.319 Cerebral infarction due to thrombosis of unspecified middle cerebral artery
      3. I63.32 Cerebral infarction due to thrombosis of anterior cerebral artery

        • I63.321 Cerebral infarction due to thrombosis of right anterior cerebral artery
        • I63.322 Cerebral infarction due to thrombosis of left anterior cerebral artery
        • I63.323 Cerebral infarction due to thrombosis of bilateral anterior cerebral arteries
        • I63.329 Cerebral infarction due to thrombosis of unspecified anterior cerebral artery
      4. I63.33 Cerebral infarction due to thrombosis of posterior cerebral artery

        • I63.331 Cerebral infarction due to thrombosis of right posterior cerebral artery
        • I63.332 Cerebral infarction due to thrombosis of left posterior cerebral artery
        • I63.333 Cerebral infarction due to thrombosis of bilateral posterior cerebral arteries
        • I63.339 Cerebral infarction due to thrombosis of unspecified posterior cerebral artery
      5. I63.34 Cerebral infarction due to thrombosis of cerebellar artery

        • I63.341 Cerebral infarction due to thrombosis of right cerebellar artery
        • I63.342 Cerebral infarction due to thrombosis of left cerebellar artery
        • I63.343 Cerebral infarction due to thrombosis of bilateral cerebellar arteries
        • I63.349 Cerebral infarction due to thrombosis of unspecified cerebellar artery
      6. I63.39 Cerebral infarction due to thrombosis of other cerebral artery

    5. I63.4 Cerebral infarction due to embolism of cerebral arteries

      1. I63.40 Cerebral infarction due to embolism of unspecified cerebral artery

      2. I63.41 Cerebral infarction due to embolism of middle cerebral artery

        • I63.411 Cerebral infarction due to embolism of right middle cerebral artery
        • I63.412 Cerebral infarction due to embolism of left middle cerebral artery
        • I63.413 Cerebral infarction due to embolism of bilateral middle cerebral arteries
        • I63.419 Cerebral infarction due to embolism of unspecified middle cerebral artery
      3. I63.42 Cerebral infarction due to embolism of anterior cerebral artery

        • I63.421 Cerebral infarction due to embolism of right anterior cerebral artery
        • I63.422 Cerebral infarction due to embolism of left anterior cerebral artery
        • I63.423 Cerebral infarction due to embolism of bilateral anterior cerebral arteries
        • I63.429 Cerebral infarction due to embolism of unspecified anterior cerebral artery
      4. I63.43 Cerebral infarction due to embolism of posterior cerebral artery

        • I63.431 Cerebral infarction due to embolism of right posterior cerebral artery
        • I63.432 Cerebral infarction due to embolism of left posterior cerebral artery
        • I63.433 Cerebral infarction due to embolism of bilateral posterior cerebral arteries
        • I63.439 Cerebral infarction due to embolism of unspecified posterior cerebral artery
      5. I63.44 Cerebral infarction due to embolism of cerebellar artery

        • I63.441 Cerebral infarction due to embolism of right cerebellar artery
        • I63.442 Cerebral infarction due to embolism of left cerebellar artery
        • I63.443 Cerebral infarction due to embolism of bilateral cerebellar arteries
        • I63.449 Cerebral infarction due to embolism of unspecified cerebellar artery
      6. I63.49 Cerebral infarction due to embolism of other cerebral artery

    6. I63.5 Cerebral infarction due to unspecified occlusion or stenosis of cerebral arteries

      1. I63.50 Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebral artery

      2. I63.51 Cerebral infarction due to unspecified occlusion or stenosis of middle cerebral artery

        • I63.511 Cerebral infarction due to unspecified occlusion or stenosis of right middle cerebral artery
        • I63.512 Cerebral infarction due to unspecified occlusion or stenosis of left middle cerebral artery
        • I63.513 Cerebral infarction due to unspecified occlusion or stenosis of bilateral middle cerebral arteries
        • I63.519 Cerebral infarction due to unspecified occlusion or stenosis of unspecified middle cerebral artery
      3. I63.52 Cerebral infarction due to unspecified occlusion or stenosis of anterior cerebral artery

        • I63.521 Cerebral infarction due to unspecified occlusion or stenosis of right anterior cerebral artery
        • I63.522 Cerebral infarction due to unspecified occlusion or stenosis of left anterior cerebral artery
        • I63.523 Cerebral infarction due to unspecified occlusion or stenosis of bilateral anterior cerebral arteries
        • I63.529 Cerebral infarction due to unspecified occlusion or stenosis of unspecified anterior cerebral artery
      4. I63.53 Cerebral infarction due to unspecified occlusion or stenosis of posterior cerebral artery

        • I63.531 Cerebral infarction due to unspecified occlusion or stenosis of right posterior cerebral artery
        • I63.532 Cerebral infarction due to unspecified occlusion or stenosis of left posterior cerebral artery
        • I63.533 Cerebral infarction due to unspecified occlusion or stenosis of bilateral posterior cerebral arteries
        • I63.539 Cerebral infarction due to unspecified occlusion or stenosis of unspecified posterior cerebral artery
      5. I63.54 Cerebral infarction due to unspecified occlusion or stenosis of cerebellar artery

        • I63.541 Cerebral infarction due to unspecified occlusion or stenosis of right cerebellar artery
        • I63.542 Cerebral infarction due to unspecified occlusion or stenosis of left cerebellar artery
        • I63.543 Cerebral infarction due to unspecified occlusion or stenosis of bilateral cerebellar arteries
        • I63.549 Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebellar artery
      6. I63.59 Cerebral infarction due to unspecified occlusion or stenosis of other cerebral artery

    7. I63.6 Cerebral infarction due to cerebral venous thrombosis, nonpyogenic

    8. I63.8 Other cerebral infarction

      1. I63.81 Other cerebral infarction due to occlusion or stenosis of small artery

        Inclusion term(s):

        • Lacunar infarction
      2. I63.89 Other cerebral infarction

    9. I63.9 Cerebral infarction, unspecified

      Inclusion term(s):

      • Stroke NOS
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.