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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  • I70.734—

    Atherosclerosis of other type of bypass graft(s) of the right leg with ulceration of heel and midfoot

  • I70.735—

    Atherosclerosis of other type of bypass graft(s) of the right leg with ulceration of other part of foot

  • I70.738—

    Atherosclerosis of other type of bypass graft(s) of the right leg with ulceration of other part of lower leg

  • I70.739—

    Atherosclerosis of other type of bypass graft(s) of the right leg with ulceration of unspecified site

  • I70.741—

    Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration of thigh

  • I70.742—

    Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration of calf

  • I70.743—

    Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration of ankle

  • I70.744—

    Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration of heel and midfoot

  • I70.745—

    Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration of other part of foot

  • I70.748—

    Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration of other part of lower leg

  • I70.749—

    Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration of unspecified site

  • I70.75—

    Atherosclerosis of other type of bypass graft(s) of other extremity with ulceration

  • I70.761—

    Atherosclerosis of other type of bypass graft(s) of the extremities with gangrene, right leg

  • I70.762—

    Atherosclerosis of other type of bypass graft(s) of the extremities with gangrene, left leg

  • I70.763—

    Atherosclerosis of other type of bypass graft(s) of the extremities with gangrene, bilateral legs

  • I70.768—

    Atherosclerosis of other type of bypass graft(s) of the extremities with gangrene, other extremity

  • I70.769—

    Atherosclerosis of other type of bypass graft(s) of the extremities with gangrene, unspecified extremity

  • I70.791—

    Other atherosclerosis of other type of bypass graft(s) of the extremities, right leg

  • I70.792—

    Other atherosclerosis of other type of bypass graft(s) of the extremities, left leg

  • I70.793—

    Other atherosclerosis of other type of bypass graft(s) of the extremities, bilateral legs

  • I70.798—

    Other atherosclerosis of other type of bypass graft(s) of the extremities, other extremity

  • I70.799—

    Other atherosclerosis of other type of bypass graft(s) of the extremities, unspecified extremity

  • I70.8—

    Atherosclerosis of other arteries

  • I70.90—

    Unspecified atherosclerosis

  • I70.91—

    Generalized atherosclerosis

  • I70.92—

    Chronic total occlusion of artery of the extremities

  • I71.00—

    Dissection of unspecified site of 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

  • I71.10—

    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

  • I71.20—

    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

  • I71.30—

    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

  • I71.40—

    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

  • I71.50—

    Thoracoabdominal aortic aneurysm, ruptured, unspecified

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