Chapter 9: Diseases of the Circulatory System
ICD-10-CM codes I00-I99
One of the most heavily coded chapters, covering hypertension, heart failure, coronary artery disease, atrial fibrillation, stroke, deep vein thrombosis, and peripheral vascular disease. Essential hypertension (I10) is the single most commonly billed ICD-10 code in the United States.
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
I30Acute pericarditis
I31Other diseases of pericardium
I32Pericarditis in diseases classified elsewhere
I33Acute and subacute endocarditis
I34Nonrheumatic mitral valve disorders
I35Nonrheumatic aortic valve disorders
I36Nonrheumatic tricuspid valve disorders
I37Nonrheumatic pulmonary valve disorders
I38Endocarditis, valve unspecified
I39Endocarditis and heart valve disord in dis classd elswhr
I40Acute myocarditis
I41Myocarditis in diseases classified elsewhere
I42Cardiomyopathy
I43Cardiomyopathy in diseases classified elsewhere
I44Atrioventricular and left bundle-branch block
I45Other conduction disorders
I46Cardiac arrest
I47Paroxysmal tachycardia
I48Atrial fibrillation and flutter
I49Other cardiac arrhythmias
I50Heart failure
I51Complications and ill-defined descriptions of heart disease
I52Other heart disorders in diseases classified elsewhere
I5ANon-ischemic myocardial injury (non-traumatic)
I60-I69
Cerebrovascular Diseases
I60Nontraumatic subarachnoid hemorrhage
I61Nontraumatic intracerebral hemorrhage
I62Other and unspecified nontraumatic intracranial hemorrhage
I63Cerebral infarction
I65Occls and stenosis of precerb art, not rslt in cereb infrc
I66Occls and stenosis of cereb art, not rslt in cerebral infrc
I67Other cerebrovascular diseases
I68Cerebrovascular disorders in diseases classified elsewhere
I69Sequelae of cerebrovascular disease
I70-I79
Diseases of Arteries, Arterioles and Capillaries
I70Atherosclerosis
I71Aortic aneurysm and dissection
I72Other aneurysm
I73Other peripheral vascular diseases
I74Arterial embolism and thrombosis
I75Atheroembolism
I76Septic arterial embolism
I77Other disorders of arteries and arterioles
I78Diseases of capillaries
I79Disord of art, arterioles and capilare in dis classd elswhr
I80-I89
Diseases of Veins, Lymphatic Vessels and Lymph Nodes
I80Phlebitis and thrombophlebitis
I81Portal vein thrombosis
I82Other venous embolism and thrombosis
I83Varicose veins of lower extremities
I85Esophageal varices
I86Varicose veins of other sites
I87Other disorders of veins
I88Nonspecific lymphadenitis
I89Oth noninfective disorders of lymphatic vessels and nodes
I95-I99
Other and Unspecified Disorders of the Circulatory System
Frequently Asked Questions
What ICD-10 codes are in Chapter 9?
Chapter 9: Diseases of the Circulatory System covers ICD-10-CM codes I00-I99. It contains 10 code blocks with 80 top-level categories.
What conditions does ICD-10 Chapter 9 cover?
One of the most heavily coded chapters, covering hypertension, heart failure, coronary artery disease, atrial fibrillation, stroke, deep vein thrombosis, and peripheral vascular disease. Essential hypertension (I10) is the single most commonly billed ICD-10 code in the United States. This chapter includes codes from I00-I99.
How many code blocks are in Chapter 9?
Chapter 9 has 10 code blocks: I00-I02 (Acute Rheumatic Fever), I05-I09 (Chronic Rheumatic Heart Diseases), I10-I1A (Hypertensive Diseases), I20-I25 (Ischemic Heart Diseases), and 6 more.
Is there an ICD-11 equivalent of ICD-10 Chapter 9?
ICD-11 reorganizes many chapters compared to ICD-10. Some conditions in Chapter 9 may appear in different ICD-11 chapters. Use the ICD-10 to ICD-11 converter to find specific code equivalents.
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