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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  • I70.8—

    Atherosclerosis of other arteries

  • I70.9—

    Other and unspecified atherosclerosis

  • I70.90—

    Unspecified atherosclerosis

  • I70.91—

    Generalized atherosclerosis

  • I70.92—

    Chronic total occlusion of artery of the extremities

  • I71—

    Aortic aneurysm and dissection

  • I71.0—

    Dissection of aorta

  • I71.00—

    Dissection of unspecified site of aorta

  • I71.01—

    Dissection of thoracic aorta

  • I71.010—

    Dissection of ascending aorta

  • I71.011—

    Dissection of aortic arch

  • I71.012—

    Dissection of descending thoracic aorta

  • I71.019—

    Dissection of thoracic aorta, unspecified

  • I71.02—

    Dissection of abdominal aorta

  • I71.03—

    Dissection of thoracoabdominal aorta

  • I71.1—

    Thoracic aortic aneurysm, ruptured

  • I71.10—

    Thoracic aortic aneurysm, ruptured, unspecified

  • I71.11—

    Aneurysm of the ascending aorta, ruptured

  • I71.12—

    Aneurysm of the aortic arch, ruptured

  • I71.13—

    Aneurysm of the descending thoracic aorta, ruptured

  • I71.2—

    Thoracic aortic aneurysm, without rupture

  • I71.20—

    Thoracic aortic aneurysm, without rupture, unspecified

  • I71.21—

    Aneurysm of the ascending aorta, without rupture

  • I71.22—

    Aneurysm of the aortic arch, without rupture

  • I71.23—

    Aneurysm of the descending thoracic aorta, without rupture

  • I71.3—

    Abdominal aortic aneurysm, ruptured

  • I71.30—

    Abdominal aortic aneurysm, ruptured, unspecified

  • I71.31—

    Pararenal abdominal aortic aneurysm, ruptured

  • I71.32—

    Juxtarenal abdominal aortic aneurysm, ruptured

  • I71.33—

    Infrarenal abdominal aortic aneurysm, ruptured

  • I71.4—

    Abdominal aortic aneurysm, without rupture

  • I71.40—

    Abdominal aortic aneurysm, without rupture, unspecified

  • I71.41—

    Pararenal abdominal aortic aneurysm, without rupture

  • I71.42—

    Juxtarenal abdominal aortic aneurysm, without rupture

  • I71.43—

    Infrarenal abdominal aortic aneurysm, without rupture

  • I71.5—

    Thoracoabdominal aortic aneurysm, ruptured

  • I71.50—

    Thoracoabdominal aortic aneurysm, ruptured, unspecified

  • I71.51—

    Supraceliac aneurysm of the thoracoabdominal aorta, ruptured

  • I71.52—

    Paravisceral aneurysm of the thoracoabdominal aorta, ruptured

  • I71.6—

    Thoracoabdominal aortic aneurysm, without rupture

  • I71.60—

    Thoracoabdominal aortic aneurysm, without rupture, unspecified

  • I71.61—

    Supraceliac aneurysm of the thoracoabdominal aorta, without rupture

  • I71.62—

    Paravisceral aneurysm of the thoracoabdominal aorta, without rupture

  • I71.8—

    Aortic aneurysm of unspecified site, ruptured

  • I71.9—

    Aortic aneurysm of unspecified site, without rupture

  • I72—

    Other aneurysm

  • I72.0—

    Aneurysm of carotid artery

  • I72.1—

    Aneurysm of artery of upper extremity

  • I72.2—

    Aneurysm of renal artery

  • I72.3—

    Aneurysm of iliac artery

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