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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  • I25.42|

    Coronary artery dissection

  • I25.5|

    Ischemic cardiomyopathy

  • I25.6|

    Silent myocardial ischemia

  • I25.700|

    Atherosclerosis of coronary artery bypass graft(s), unspecified, with unstable angina pectoris

  • I25.701|

    Atherosclerosis of coronary artery bypass graft(s), unspecified, with angina pectoris with documented spasm

  • I25.702|

    Atherosclerosis of coronary artery bypass graft(s), unspecified, with refractory angina pectoris

  • I25.708|

    Atherosclerosis of coronary artery bypass graft(s), unspecified, with other forms of angina pectoris

  • I25.709|

    Atherosclerosis of coronary artery bypass graft(s), unspecified, with unspecified angina pectoris

  • I25.710|

    Atherosclerosis of autologous vein coronary artery bypass graft(s) with unstable angina pectoris

  • I25.711|

    Atherosclerosis of autologous vein coronary artery bypass graft(s) with angina pectoris with documented spasm

  • I25.712|

    Atherosclerosis of autologous vein coronary artery bypass graft(s) with refractory angina pectoris

  • I25.718|

    Atherosclerosis of autologous vein coronary artery bypass graft(s) with other forms of angina pectoris

  • I25.719|

    Atherosclerosis of autologous vein coronary artery bypass graft(s) with unspecified angina pectoris

  • I25.720|

    Atherosclerosis of autologous artery coronary artery bypass graft(s) with unstable angina pectoris

  • I25.721|

    Atherosclerosis of autologous artery coronary artery bypass graft(s) with angina pectoris with documented spasm

  • I25.722|

    Atherosclerosis of autologous artery coronary artery bypass graft(s) with refractory angina pectoris

  • I25.728|

    Atherosclerosis of autologous artery coronary artery bypass graft(s) with other forms of angina pectoris

  • I25.729|

    Atherosclerosis of autologous artery coronary artery bypass graft(s) with unspecified angina pectoris

  • I25.730|

    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unstable angina pectoris

  • I25.731|

    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with angina pectoris with documented spasm

  • I25.732|

    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with refractory angina pectoris

  • I25.738|

    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with other forms of angina pectoris

  • I25.739|

    Atherosclerosis of nonautologous biological coronary artery bypass graft(s) with unspecified angina pectoris

  • I25.750|

    Atherosclerosis of native coronary artery of transplanted heart with unstable angina

  • I25.751|

    Atherosclerosis of native coronary artery of transplanted heart with angina pectoris with documented spasm

  • I25.752|

    Atherosclerosis of native coronary artery of transplanted heart with refractory angina pectoris

  • I25.758|

    Atherosclerosis of native coronary artery of transplanted heart with other forms of angina pectoris

  • I25.759|

    Atherosclerosis of native coronary artery of transplanted heart with unspecified angina pectoris

  • I25.760|

    Atherosclerosis of bypass graft of coronary artery of transplanted heart with unstable angina

  • I25.761|

    Atherosclerosis of bypass graft of coronary artery of transplanted heart with angina pectoris with documented spasm

  • I25.762|

    Atherosclerosis of bypass graft of coronary artery of transplanted heart with refractory angina pectoris

  • I25.768|

    Atherosclerosis of bypass graft of coronary artery of transplanted heart with other forms of angina pectoris

  • I25.769|

    Atherosclerosis of bypass graft of coronary artery of transplanted heart with unspecified angina pectoris

  • I25.790|

    Atherosclerosis of other coronary artery bypass graft(s) with unstable angina pectoris

  • I25.791|

    Atherosclerosis of other coronary artery bypass graft(s) with angina pectoris with documented spasm

  • I25.792|

    Atherosclerosis of other coronary artery bypass graft(s) with refractory angina pectoris

  • I25.798|

    Atherosclerosis of other coronary artery bypass graft(s) with other forms of angina pectoris

  • I25.799|

    Atherosclerosis of other coronary artery bypass graft(s) with unspecified angina pectoris

  • I25.810|

    Atherosclerosis of coronary artery bypass graft(s) without angina pectoris

  • I25.811|

    Atherosclerosis of native coronary artery of transplanted heart without angina pectoris

  • I25.812|

    Atherosclerosis of bypass graft of coronary artery of transplanted heart without angina pectoris

  • I25.82|

    Chronic total occlusion of coronary artery

  • I25.83|

    Coronary atherosclerosis due to lipid rich plaque

  • I25.84|

    Coronary atherosclerosis due to calcified coronary lesion

  • I25.85|

    Chronic coronary microvascular dysfunction

  • I25.89|

    Other forms of chronic ischemic heart disease

  • I25.9|

    Chronic ischemic heart disease, unspecified

  • I26.01|

    Septic pulmonary embolism with acute cor pulmonale

  • I26.02|

    Saddle embolus of pulmonary artery with acute cor pulmonale

  • I26.03|

    Cement embolism of pulmonary artery with acute cor pulmonale

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