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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  • I70.262—

    Atherosclerosis of native arteries of extremities with gangrene, left leg

  • I70.263—

    Atherosclerosis of native arteries of extremities with gangrene, bilateral legs

  • I70.268—

    Atherosclerosis of native arteries of extremities with gangrene, other extremity

  • I70.269—

    Atherosclerosis of native arteries of extremities with gangrene, unspecified extremity

  • I70.29—

    Other atherosclerosis of native arteries of extremities

  • I70.291—

    Other atherosclerosis of native arteries of extremities, right leg

  • I70.292—

    Other atherosclerosis of native arteries of extremities, left leg

  • I70.293—

    Other atherosclerosis of native arteries of extremities, bilateral legs

  • I70.298—

    Other atherosclerosis of native arteries of extremities, other extremity

  • I70.299—

    Other atherosclerosis of native arteries of extremities, unspecified extremity

  • I70.3—

    Atherosclerosis of unspecified type of bypass graft(s) of the extremities

  • I70.30—

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

  • I70.301—

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

  • I70.302—

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

  • I70.303—

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

  • I70.308—

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

  • I70.309—

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

  • I70.31—

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

  • I70.311—

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

  • I70.312—

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

  • I70.313—

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

  • I70.318—

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

  • I70.319—

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

  • I70.32—

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

  • I70.321—

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

  • I70.322—

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

  • I70.323—

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

  • I70.328—

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

  • I70.329—

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

  • I70.33—

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

  • I70.331—

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

  • I70.332—

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

  • I70.333—

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

  • I70.334—

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

  • I70.335—

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

  • I70.338—

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

  • I70.339—

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

  • I70.34—

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

  • I70.341—

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

  • I70.342—

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

  • I70.343—

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

  • I70.344—

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

  • I70.345—

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

  • I70.348—

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

  • I70.349—

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

  • I70.35—

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

  • I70.36—

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

  • I70.361—

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

  • I70.362—

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

  • I70.363—

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

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