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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  • I25.728—

    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

  • I25.73—

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

  • I25.75—

    Atherosclerosis of native coronary artery of transplanted heart with 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

  • I25.76—

    Atherosclerosis of bypass graft of coronary artery of transplanted heart with 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

  • I25.79—

    Atherosclerosis of other coronary artery bypass graft(s) with 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

  • I25.8—

    Other forms of chronic ischemic heart disease

  • I25.81—

    Atherosclerosis of other coronary vessels without 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—

    Pulmonary embolism

  • I26.0—

    Pulmonary embolism with acute cor pulmonale

  • 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

  • I26.04—

    Fat embolism of pulmonary artery with acute cor pulmonale

  • I26.09—

    Other pulmonary embolism with acute cor pulmonale

  • I26.9—

    Pulmonary embolism without acute cor pulmonale

  • I26.90—

    Septic pulmonary embolism without acute cor pulmonale

  • I26.92—

    Saddle embolus of pulmonary artery without acute cor pulmonale

  • I26.93—

    Single subsegmental thrombotic pulmonary embolism without acute cor pulmonale

  • I26.94—

    Multiple subsegmental thrombotic pulmonary emboli without acute cor pulmonale

  • I26.95—

    Cement embolism of pulmonary artery without acute cor pulmonale

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