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
PrevNext
  • I23|

    Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period)

  • I23.0|

    Hemopericardium as current complication following acute myocardial infarction

  • I23.1|

    Atrial septal defect as current complication following acute myocardial infarction

  • I23.2|

    Ventricular septal defect as current complication following acute myocardial infarction

  • I23.3|

    Rupture of cardiac wall without hemopericardium as current complication following acute myocardial infarction

  • I23.4|

    Rupture of chordae tendineae as current complication following acute myocardial infarction

  • I23.5|

    Rupture of papillary muscle as current complication following acute myocardial infarction

  • I23.6|

    Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction

  • I23.7|

    Postinfarction angina

  • I23.8|

    Other current complications following acute myocardial infarction

  • I24|

    Other acute ischemic heart diseases

  • I24.0|

    Acute coronary thrombosis not resulting in myocardial infarction

  • I24.1|

    Dressler's syndrome

  • I24.8|

    Other forms of acute ischemic heart disease

  • I24.81|

    Acute coronary microvascular dysfunction

  • I24.89|

    Other forms of acute ischemic heart disease

  • I24.9|

    Acute ischemic heart disease, unspecified

  • I25|

    Chronic ischemic heart disease

  • I25.1|

    Atherosclerotic heart disease of native coronary artery

  • I25.10|

    Atherosclerotic heart disease of native coronary artery without angina pectoris

  • I25.11|

    Atherosclerotic heart disease of native coronary artery with angina pectoris

  • I25.110|

    Atherosclerotic heart disease of native coronary artery with unstable angina pectoris

  • I25.111|

    Atherosclerotic heart disease of native coronary artery with angina pectoris with documented spasm

  • I25.112|

    Atherosclerotic heart disease of native coronary artery with refractory angina pectoris

  • I25.118|

    Atherosclerotic heart disease of native coronary artery with other forms of angina pectoris

  • I25.119|

    Atherosclerotic heart disease of native coronary artery with unspecified angina pectoris

  • I25.2|

    Old myocardial infarction

  • I25.3|

    Aneurysm of heart

  • I25.4|

    Coronary artery aneurysm and dissection

  • I25.41|

    Coronary artery aneurysm

  • I25.42|

    Coronary artery dissection

  • I25.5|

    Ischemic cardiomyopathy

  • I25.6|

    Silent myocardial ischemia

  • I25.7|

    Atherosclerosis of coronary artery bypass graft(s) and coronary artery of transplanted heart with angina pectoris

  • I25.70|

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

  • 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

  • I25.71|

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

  • I25.72|

    Atherosclerosis of autologous artery coronary artery bypass graft(s) with 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

PreviousPage 3 of 36Next