I00–I99: Diseases of the Circulatory System
Chapter 9 of ICD-10-CM 2027, 1,807 codes in 10 blocks.
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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.-)
Codes in this chapter
All codesBillable only1,433 results
- I16.1Hypertensive emergency
- I16.9Hypertensive crisis, unspecified
- I1A.0Resistant hypertension
- I20.0Unstable angina
- I20.1Angina pectoris with documented spasm
- I20.2Refractory angina pectoris
- I20.81Angina pectoris with coronary microvascular dysfunction
- I20.89Other forms of angina pectoris
- I20.9Angina pectoris, unspecified
- I21.01ST elevation (STEMI) myocardial infarction involving left main coronary artery
- I21.02ST elevation (STEMI) myocardial infarction involving left anterior descending coronary artery
- I21.09ST elevation (STEMI) myocardial infarction involving other coronary artery of anterior wall
- I21.11ST elevation (STEMI) myocardial infarction involving right coronary artery
- I21.19ST elevation (STEMI) myocardial infarction involving other coronary artery of inferior wall
- I21.21ST elevation (STEMI) myocardial infarction involving left circumflex coronary artery
- I21.29ST elevation (STEMI) myocardial infarction involving other sites
- I21.3ST elevation (STEMI) myocardial infarction of unspecified site
- I21.4Non-ST elevation (NSTEMI) myocardial infarction
- I21.9Acute myocardial infarction, unspecified
- I21.A1Myocardial infarction type 2
- I21.A9Other myocardial infarction type
- I21.BMyocardial infarction with coronary microvascular dysfunction
- I22.0Subsequent ST elevation (STEMI) myocardial infarction of anterior wall
- I22.1Subsequent ST elevation (STEMI) myocardial infarction of inferior wall
- I22.2Subsequent non-ST elevation (NSTEMI) myocardial infarction
- I22.8Subsequent ST elevation (STEMI) myocardial infarction of other sites
- I22.9Subsequent ST elevation (STEMI) myocardial infarction of unspecified site
- I23.0Hemopericardium as current complication following acute myocardial infarction
- I23.1Atrial septal defect as current complication following acute myocardial infarction
- I23.2Ventricular septal defect as current complication following acute myocardial infarction
- I23.3Rupture of cardiac wall without hemopericardium as current complication following acute myocardial infarction
- I23.4Rupture of chordae tendineae as current complication following acute myocardial infarction
- I23.5Rupture of papillary muscle as current complication following acute myocardial infarction
- I23.6Thrombosis of atrium, auricular appendage, and ventricle as current complications following acute myocardial infarction
- I23.7Postinfarction angina
- I23.8Other current complications following acute myocardial infarction
- I24.0Acute coronary thrombosis not resulting in myocardial infarction
- I24.1Dressler's syndrome
- I24.81Acute coronary microvascular dysfunction
- I24.89Other forms of acute ischemic heart disease
- I24.9Acute ischemic heart disease, unspecified
- I25.10Atherosclerotic heart disease of native coronary artery without angina pectoris
- I25.110Atherosclerotic heart disease of native coronary artery with unstable angina pectoris
- I25.111Atherosclerotic heart disease of native coronary artery with angina pectoris with documented spasm
- I25.112Atherosclerotic heart disease of native coronary artery with refractory angina pectoris
- I25.118Atherosclerotic heart disease of native coronary artery with other forms of angina pectoris
- I25.119Atherosclerotic heart disease of native coronary artery with unspecified angina pectoris
- I25.2Old myocardial infarction
- I25.3Aneurysm of heart
- I25.41Coronary artery aneurysm