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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  • I70.49—

    Other atherosclerosis of autologous vein bypass graft(s) of the extremities

  • I70.491—

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

  • I70.492—

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

  • I70.493—

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

  • I70.498—

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

  • I70.499—

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

  • I70.5—

    Atherosclerosis of nonautologous biological bypass graft(s) of the extremities

  • I70.50—

    Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities

  • I70.501—

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

  • I70.502—

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

  • I70.503—

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

  • I70.508—

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

  • I70.509—

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

  • I70.51—

    Atherosclerosis of nonautologous biological bypass graft(s) of the extremities intermittent claudication

  • I70.511—

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

  • I70.512—

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

  • I70.513—

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

  • I70.518—

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

  • I70.519—

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

  • I70.52—

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

  • I70.521—

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

  • I70.522—

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

  • I70.523—

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

  • I70.528—

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

  • I70.529—

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

  • I70.53—

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

  • I70.531—

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

  • I70.532—

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

  • I70.533—

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

  • I70.534—

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

  • I70.535—

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

  • I70.538—

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

  • I70.539—

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

  • I70.54—

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

  • I70.541—

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

  • I70.542—

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

  • I70.543—

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

  • I70.544—

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

  • I70.545—

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

  • I70.548—

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

  • I70.549—

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

  • I70.55—

    Atherosclerosis of nonautologous biological bypass graft(s) of other extremity with ulceration

  • I70.56—

    Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with gangrene

  • I70.561—

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

  • I70.562—

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

  • I70.563—

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

  • I70.568—

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

  • I70.569—

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

  • I70.59—

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

  • I70.591—

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

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