Chapter 9
Diseases of the circulatory system
I00–I99
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FY 2027 effective October 1, 2026 · 80 categories in this chapter
Blocks in This Chapter
ICD-10-CM groups this chapter's categories into 10 blocks of three-character categories.
- I00 –I02 Acute rheumatic fever
- I05 –I09 Chronic rheumatic heart diseases
- I10 –I1A Hypertensive diseases
- I20 –I25 Ischemic heart diseases
- I26 –I28 Pulmonary heart disease and diseases of pulmonary circulation
- I30 –I5A Other forms of heart disease
- I60 –I69 Cerebrovascular diseases
- I70 –I79 Diseases of arteries, arterioles and capillaries
- I80 –I89 Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
- I95 –I99 Other and unspecified disorders of the circulatory system
Categories
Acute rheumatic fever (I00-I02)
Chronic rheumatic heart diseases (I05-I09)
Hypertensive diseases (I10-I1A)
- I10 Essential (primary) hypertension
- I11 Hypertensive heart disease Has subcategories
- I12 Hypertensive chronic kidney disease Has subcategories
- I13 Hypertensive heart and chronic kidney disease Has subcategories
- I15 Secondary hypertension Has subcategories
- I16 Hypertensive crisis Has subcategories
- I1A Other hypertension Has subcategories
Ischemic heart diseases (I20-I25)
- I20 Angina pectoris Has subcategories
- I21 Acute myocardial infarction Has subcategories
- I22 Subsequent ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction Has subcategories
- I23 Certain current complications following ST elevation (STEMI) and non-ST elevation (NSTEMI) myocardial infarction (within the 28 day period) Has subcategories
- I24 Other acute ischemic heart diseases Has subcategories
- I25 Chronic ischemic heart disease Has subcategories
Pulmonary heart disease and diseases of pulmonary circulation (I26-I28)
Other forms of heart disease (I30-I5A)
- I30 Acute pericarditis Has subcategories
- I31 Other diseases of pericardium Has subcategories
- I32 Pericarditis in diseases classified elsewhere
- I33 Acute and subacute endocarditis Has subcategories
- I34 Nonrheumatic mitral valve disorders Has subcategories
- I35 Nonrheumatic aortic valve disorders Has subcategories
- I36 Nonrheumatic tricuspid valve disorders Has subcategories
- I37 Nonrheumatic pulmonary valve disorders Has subcategories
- I38 Endocarditis, valve unspecified
- I39 Endocarditis and heart valve disorders in diseases classified elsewhere
- I40 Acute myocarditis Has subcategories
- I41 Myocarditis in diseases classified elsewhere
- I42 Cardiomyopathy Has subcategories
- I43 Cardiomyopathy in diseases classified elsewhere
- I44 Atrioventricular and left bundle-branch block Has subcategories
- I45 Other conduction disorders Has subcategories
- I46 Cardiac arrest Has subcategories
- I47 Paroxysmal tachycardia Has subcategories
- I48 Atrial fibrillation and flutter Has subcategories
- I49 Other cardiac arrhythmias Has subcategories
- I50 Heart failure Has subcategories
- I51 Complications and ill-defined descriptions of heart disease Has subcategories
- I52 Other heart disorders in diseases classified elsewhere
- I5A Non-ischemic myocardial injury (non-traumatic)
Cerebrovascular diseases (I60-I69)
- I60 Nontraumatic subarachnoid hemorrhage Has subcategories
- I61 Nontraumatic intracerebral hemorrhage Has subcategories
- I62 Other and unspecified nontraumatic intracranial hemorrhage Has subcategories
- I63 Cerebral infarction Has subcategories
- I65 Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction Has subcategories
- I66 Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction Has subcategories
- I67 Other cerebrovascular diseases Has subcategories
- I68 Cerebrovascular disorders in diseases classified elsewhere Has subcategories
- I69 Sequelae of cerebrovascular disease Has subcategories
Diseases of arteries, arterioles and capillaries (I70-I79)
- I70 Atherosclerosis Has subcategories
- I71 Aortic aneurysm and dissection Has subcategories
- I72 Other aneurysm Has subcategories
- I73 Other peripheral vascular diseases Has subcategories
- I74 Arterial embolism and thrombosis Has subcategories
- I75 Atheroembolism Has subcategories
- I76 Septic arterial embolism
- I77 Other disorders of arteries and arterioles Has subcategories
- I78 Diseases of capillaries Has subcategories
- I79 Disorders of arteries, arterioles and capillaries in diseases classified elsewhere Has subcategories
Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89)
- I80 Phlebitis and thrombophlebitis Has subcategories
- I81 Portal vein thrombosis
- I82 Other venous embolism and thrombosis Has subcategories
- I83 Varicose veins of lower extremities Has subcategories
- I85 Esophageal varices Has subcategories
- I86 Varicose veins of other sites Has subcategories
- I87 Other disorders of veins Has subcategories
- I88 Nonspecific lymphadenitis Has subcategories
- I89 Other noninfective disorders of lymphatic vessels and lymph nodes Has subcategories