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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  • I69.964—

    Other paralytic syndrome following unspecified cerebrovascular disease affecting left non-dominant side

  • I69.965—

    Other paralytic syndrome following unspecified cerebrovascular disease, bilateral

  • I69.969—

    Other paralytic syndrome following unspecified cerebrovascular disease affecting unspecified side

  • I69.99—

    Other sequelae of unspecified cerebrovascular disease

  • I69.990—

    Apraxia following unspecified cerebrovascular disease

  • I69.991—

    Dysphagia following unspecified cerebrovascular disease

  • I69.992—

    Facial weakness following unspecified cerebrovascular disease

  • I69.993—

    Ataxia following unspecified cerebrovascular disease

  • I69.998—

    Other sequelae following unspecified cerebrovascular disease

  • I70—

    Atherosclerosis

  • I70.0—

    Atherosclerosis of aorta

  • I70.1—

    Atherosclerosis of renal artery

  • I70.2—

    Atherosclerosis of native arteries of the extremities

  • I70.20—

    Unspecified atherosclerosis of native arteries of extremities

  • I70.201—

    Unspecified atherosclerosis of native arteries of extremities, right leg

  • I70.202—

    Unspecified atherosclerosis of native arteries of extremities, left leg

  • I70.203—

    Unspecified atherosclerosis of native arteries of extremities, bilateral legs

  • I70.208—

    Unspecified atherosclerosis of native arteries of extremities, other extremity

  • I70.209—

    Unspecified atherosclerosis of native arteries of extremities, unspecified extremity

  • I70.21—

    Atherosclerosis of native arteries of extremities with intermittent claudication

  • I70.211—

    Atherosclerosis of native arteries of extremities with intermittent claudication, right leg

  • I70.212—

    Atherosclerosis of native arteries of extremities with intermittent claudication, left leg

  • I70.213—

    Atherosclerosis of native arteries of extremities with intermittent claudication, bilateral legs

  • I70.218—

    Atherosclerosis of native arteries of extremities with intermittent claudication, other extremity

  • I70.219—

    Atherosclerosis of native arteries of extremities with intermittent claudication, unspecified extremity

  • I70.22—

    Atherosclerosis of native arteries of extremities with rest pain

  • I70.221—

    Atherosclerosis of native arteries of extremities with rest pain, right leg

  • I70.222—

    Atherosclerosis of native arteries of extremities with rest pain, left leg

  • I70.223—

    Atherosclerosis of native arteries of extremities with rest pain, bilateral legs

  • I70.228—

    Atherosclerosis of native arteries of extremities with rest pain, other extremity

  • I70.229—

    Atherosclerosis of native arteries of extremities with rest pain, unspecified extremity

  • I70.23—

    Atherosclerosis of native arteries of right leg with ulceration

  • I70.231—

    Atherosclerosis of native arteries of right leg with ulceration of thigh

  • I70.232—

    Atherosclerosis of native arteries of right leg with ulceration of calf

  • I70.233—

    Atherosclerosis of native arteries of right leg with ulceration of ankle

  • I70.234—

    Atherosclerosis of native arteries of right leg with ulceration of heel and midfoot

  • I70.235—

    Atherosclerosis of native arteries of right leg with ulceration of other part of foot

  • I70.238—

    Atherosclerosis of native arteries of right leg with ulceration of other part of lower leg

  • I70.239—

    Atherosclerosis of native arteries of right leg with ulceration of unspecified site

  • I70.24—

    Atherosclerosis of native arteries of left leg with ulceration

  • I70.241—

    Atherosclerosis of native arteries of left leg with ulceration of thigh

  • I70.242—

    Atherosclerosis of native arteries of left leg with ulceration of calf

  • I70.243—

    Atherosclerosis of native arteries of left leg with ulceration of ankle

  • I70.244—

    Atherosclerosis of native arteries of left leg with ulceration of heel and midfoot

  • I70.245—

    Atherosclerosis of native arteries of left leg with ulceration of other part of foot

  • I70.248—

    Atherosclerosis of native arteries of left leg with ulceration of other part of lower leg

  • I70.249—

    Atherosclerosis of native arteries of left leg with ulceration of unspecified site

  • I70.25—

    Atherosclerosis of native arteries of other extremities with ulceration

  • I70.26—

    Atherosclerosis of native arteries of extremities with gangrene

  • I70.261—

    Atherosclerosis of native arteries of extremities with gangrene, right leg

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