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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  • I70.618—

    Atherosclerosis of nonbiological bypass graft(s) of the extremities with intermittent claudication, other extremity

  • I70.619—

    Atherosclerosis of nonbiological bypass graft(s) of the extremities with intermittent claudication, unspecified extremity

  • I70.621—

    Atherosclerosis of nonbiological bypass graft(s) of the extremities with rest pain, right leg

  • I70.622—

    Atherosclerosis of nonbiological bypass graft(s) of the extremities with rest pain, left leg

  • I70.623—

    Atherosclerosis of nonbiological bypass graft(s) of the extremities with rest pain, bilateral legs

  • I70.628—

    Atherosclerosis of nonbiological bypass graft(s) of the extremities with rest pain, other extremity

  • I70.629—

    Atherosclerosis of nonbiological bypass graft(s) of the extremities with rest pain, unspecified extremity

  • I70.631—

    Atherosclerosis of nonbiological bypass graft(s) of the right leg with ulceration of thigh

  • I70.632—

    Atherosclerosis of nonbiological bypass graft(s) of the right leg with ulceration of calf

  • I70.633—

    Atherosclerosis of nonbiological bypass graft(s) of the right leg with ulceration of ankle

  • I70.634—

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

  • I70.635—

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

  • I70.638—

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

  • I70.639—

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

  • I70.641—

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

  • I70.642—

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

  • I70.643—

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

  • I70.644—

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

  • I70.645—

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

  • I70.648—

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

  • I70.649—

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

  • I70.65—

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

  • I70.661—

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

  • I70.662—

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

  • I70.663—

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

  • I70.668—

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

  • I70.669—

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

  • I70.691—

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

  • I70.692—

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

  • I70.693—

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

  • I70.698—

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

  • I70.699—

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

  • I70.701—

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

  • I70.702—

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

  • I70.703—

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

  • I70.708—

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

  • I70.709—

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

  • I70.711—

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

  • I70.712—

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

  • I70.713—

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

  • I70.718—

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

  • I70.719—

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

  • I70.721—

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

  • I70.722—

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

  • I70.723—

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

  • I70.728—

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

  • I70.729—

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

  • I70.731—

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

  • I70.732—

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

  • I70.733—

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

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