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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  • I70.592—

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

  • I70.593—

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

  • I70.598—

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

  • I70.599—

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

  • I70.6—

    Atherosclerosis of nonbiological bypass graft(s) of the extremities

  • I70.60—

    Unspecified atherosclerosis of nonbiological bypass graft(s) of the extremities

  • I70.601—

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

  • I70.602—

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

  • I70.603—

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

  • I70.608—

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

  • I70.609—

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

  • I70.61—

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

  • I70.611—

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

  • I70.612—

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

  • I70.613—

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

  • 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

  • I70.62—

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

  • 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

  • I70.63—

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

  • 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

  • I70.64—

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

  • 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

  • I70.66—

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

  • 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

  • I70.69—

    Other atherosclerosis of nonbiological bypass graft(s) of the extremities

  • 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

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