All ICD10 Codes
Chapter 9

I00–I99: Diseases of the Circulatory System

Diseases of the Circulatory System diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)
All CodesBillable Only
Internal Codes
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  • I62.03|

    Nontraumatic chronic subdural hemorrhage

  • I62.1|

    Nontraumatic extradural hemorrhage

  • I62.9|

    Nontraumatic intracranial hemorrhage, unspecified

  • I63.00|

    Cerebral infarction due to thrombosis of unspecified precerebral 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

  • I63.02|

    Cerebral infarction due to thrombosis of basilar 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

  • I63.09|

    Cerebral infarction due to thrombosis of other precerebral artery

  • I63.10|

    Cerebral infarction due to embolism of unspecified precerebral 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

  • I63.12|

    Cerebral infarction due to embolism of basilar 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

  • I63.19|

    Cerebral infarction due to embolism of other precerebral artery

  • I63.20|

    Cerebral infarction due to unspecified occlusion or stenosis of unspecified precerebral 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

  • I63.22|

    Cerebral infarction due to unspecified occlusion or stenosis of basilar artery

  • 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

  • I63.29|

    Cerebral infarction due to unspecified occlusion or stenosis of other precerebral arteries

  • I63.30|

    Cerebral infarction due to thrombosis of unspecified 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

  • 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

  • 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

  • I63.341|

    Cerebral infarction due to thrombosis of right cerebellar artery

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