ICD 10 Code for Circulatory System Diseases: Range (I00-I99)

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ICD-10 Code I00-I99 is designated for circulatory system diseases, encompassing a comprehensive array of conditions related to the cardiovascular system. Within this range, distinct categories address specific aspects of circulatory health. Each category contains detailed codes for various cardiovascular conditions, providing a structured and specific framework for healthcare professionals to communicate diagnoses and contribute to a comprehensive understanding of circulatory system health.

ICD-10-CM Code I00-I02: Acute Rheumatic Fever

Acute rheumatic fever is an inflammatory condition that can follow untreated or inadequately treated streptococcal throat infections.

Key ICD-10-CM Codes for Acute Rheumatic Fever
ICD Code	Description	Diagnosis
I00.0	Rheumatic fever without heart involvement	Acute rheumatic fever without documented heart involvement
I01.0	Rheumatic endocarditis	Acute rheumatic fever with involvement of the endocardium
I01.1	Rheumatic myocarditis	Acute rheumatic fever with inflammation of the myocardium
I01.8	Other rheumatic heart diseases	Other specified rheumatic heart diseases associated with acute rheumatic fever
I01.9	Rheumatic heart disease, unspecified	Acute rheumatic fever with unspecified involvement of the heart
I02.0	Rheumatic chorea with heart involvement	Acute rheumatic fever with chorea and documented heart involvement
I02.9	Rheumatic chorea without heart involvement	Acute rheumatic fever presenting with chorea but without documented heart involvement
I08.1	Rheumatic disorders of both mitral and aortic valves	Acute rheumatic fever affecting both the mitral and aortic valves
I08.8	Other multiple valve diseases	Acute rheumatic fever with involvement of multiple heart valves not classified elsewhere
I09.9	Other specified rheumatic heart diseases	Acute rheumatic fever with other specific heart involvement not covered by the preceding codes

Further Reading:

ICD-10-CM Code I05-I09: Chronic Rheumatic Heart Diseases

Chronic rheumatic heart diseases typically arise from inflammatory processes triggered by untreated or inadequately treated streptococcal infections. This category includes several specific codes, each addressing different aspects of the condition.

Key ICD-10-CM Codes for Chronic Rheumatic Heart Diseases
ICD Code	Description	Diagnosis
I05.0	Rheumatic mitral stenosis	Chronic rheumatic heart disease characterized by stenosis of the mitral valve
I05.8	Other rheumatic mitral valve diseases	Chronic rheumatic heart disease affecting the mitral valve in a manner not specified by other codes
I06.0	Rheumatic aortic stenosis	Chronic rheumatic heart disease marked by stenosis of the aortic valve
I06.2	Rheumatic aortic stenosis with insufficiency	Chronic rheumatic heart disease involving both stenosis and insufficiency of the aortic valve
I07.0	Rheumatic tricuspid stenosis	Chronic rheumatic heart disease characterized by stenosis of the tricuspid valve
I07.1	Rheumatic tricuspid insufficiency	Chronic rheumatic heart disease involving insufficiency of the tricuspid valve
I08.0	Rheumatic disorders of both mitral and aortic valves	Chronic rheumatic heart disease affecting both the mitral and aortic valves
I08.1	Rheumatic disorders of both mitral and tricuspid valves	Chronic rheumatic heart disease involving both the mitral and tricuspid valves
I08.2	Rheumatic disorders of both aortic and tricuspid valves	Chronic rheumatic heart disease affecting both the aortic and tricuspid valves
I09.9	Other specified rheumatic heart diseases	Chronic rheumatic heart disease with specific heart involvement not covered by the preceding codes

ICD-10-CM Code I10-I15: Hypertensive Diseases

ICD-10-CM Code range I10-I15 is dedicated to hypertensive diseases, providing a systematic classification for conditions related to high blood pressure. This category encompasses a spectrum of hypertensive disorders.

Key ICD-10-CM Codes for Hypertensive Diseases
ICD Code	Description	Diagnosis
I10	Essential (primary) hypertension	Hypertension identified as the primary condition without an underlying cause
I11.0	Hypertensive heart disease with heart failure	Hypertensive heart disease leading to heart failure, indicated by symptoms such as dyspnea and edema
I11.9	Hypertensive heart disease without heart failure	Hypertensive heart disease without concurrent heart failure, denoting complications related to elevated blood pressure
I12.0	Hypertensive heart and chronic kidney disease with heart failure	Hypertensive heart and renal disease contributing to heart failure, reflecting both cardiac and renal involvement
I12.9	Hypertensive heart and chronic kidney disease, unspecified	Hypertensive heart and renal disease without specifying the presence of heart failure
I13.0	Hypertensive heart and renal disease with heart failure	Hypertensive heart and renal disease with documented heart failure as a complication
I13.2	Hypertensive heart and renal disease with high-grade proteinuria	Hypertensive heart and renal disease associated with significant proteinuria, indicating renal impairment
I15.0	Renovascular hypertension	Hypertension attributed to renal artery stenosis or other renovascular conditions
I15.8	Other secondary hypertension	Secondary hypertension arising from causes other than renovascular issues, such as endocrine disorders or medications
I15.9	Secondary hypertension, unspecified	Secondary hypertension with an unspecified cause, indicating the need for further investigation

ICD-10-CM Code I20-I25: Ischemic Heart Diseases

Range I20-I25 encompasses a comprehensive classification system for ischemic heart diseases, covering a spectrum of conditions resulting from reduced blood flow to the heart muscle.

Key ICD-10-CM Codes for Ischemic Heart Diseases
ICD Code	Description	Diagnosis
I20.0	Unstable angina	Acute chest pain or discomfort at rest or with minimal exertion, indicating unstable angina
I20.1	Angina pectoris with documented spasm	Angina pectoris caused by coronary artery spasm, often presenting with transient chest pain
I21.0	Acute transmural myocardial infarction of anterior wall	Acute myocardial infarction affecting the anterior wall of the heart, leading to ischemic damage
I21.1	Acute transmural myocardial infarction of inferior wall	Acute myocardial infarction affecting the inferior wall of the heart
I22.0	Subsequent myocardial infarction of anterior wall	Subsequent occurrence of myocardial infarction, specifically involving the anterior wall of the heart
I22.1	Subsequent myocardial infarction of inferior wall	Subsequent occurrence of myocardial infarction, with the affected area now involving the inferior wall of the heart
I23.0	Certain current complications following acute myocardial infarction	Complications such as arrhythmias, heart failure, or mechanical complications occurring in the aftermath of acute myocardial infarction
I24.1	Dressler's syndrome	An inflammatory condition involving the pericardium, occurring as a late complication of myocardial infarction
I25.10	Atherosclerotic heart disease of the native coronary artery without angina pectoris	Chronic ischemic heart disease characterized by atherosclerosis affecting native coronary arteries without the presence of angina
I25.2	Old myocardial infarction	The presence of myocardial infarction that occurred in the past, indicated by scar tissue formation

ICD-10-CM Code I26-I28: Pulmonary Heart Disease and Diseases of Pulmonary Circulation

Pulmonary heart disease, also known as cor pulmonale, refers to a condition where the right side of the heart becomes enlarged and weakened due to a chronic lung disorder or pulmonary hypertension.

Key ICD-10-CM Codes for Pulmonary Heart Disease and Diseases of Pulmonary Circulation
ICD Code	Description	Diagnosis
I26.0	Pulmonary embolism with acute cor pulmonale	Acute blockage of pulmonary arteries leading to acute cor pulmonale, a condition where the right side of the heart is strained due to pulmonary issues
I26.9	Pulmonary embolism without acute cor pulmonale	Pulmonary embolism without immediate signs of acute cor pulmonale
I27.0	Primary pulmonary hypertension	Chronic elevation of blood pressure in the pulmonary arteries, not associated with other diseases, leading to right heart strain
I27.2	Other secondary pulmonary hypertension	Pulmonary hypertension secondary to underlying conditions, such as lung diseases or heart disorders
I27.81	Cor pulmonale (chronic)	Chronic strain on the right side of the heart due to pulmonary disorders, often associated with chronic lung diseases like COPD
I27.89	Other specified pulmonary heart diseases	Other specific pulmonary heart diseases not covered by the preceding codes, encompassing various vascular abnormalities
I27.9	Pulmonary heart disease, unspecified	Unspecified pulmonary heart disease, providing a general code when the specific condition is not identified
I28.0	Arteriovenous fistula of pulmonary vessels	Abnormal connection between pulmonary arteries and veins, affecting pulmonary circulation
I28.1	Aneurysm of the pulmonary artery	Enlargement or bulging of the pulmonary artery, potentially impacting pulmonary circulation
I28.8	Other specified diseases of pulmonary vessels	Other specific diseases affecting pulmonary vessels, including stenosis or other structural abnormalities

ICD-10-CM Code I30-I52: Other Forms of Heart Disease

Other forms of heart disease are a broad category that encompasses a variety of cardiovascular conditions beyond those specifically covered in other, more narrowly defined code ranges within ICD code I30-150. These conditions involve diverse aspects of the heart and its surrounding structures, ranging from inflammatory conditions of the pericardium and endocardium to disorders of the heart valves, myocardium (heart muscle), and the electrical conduction system.

Key ICD-10-CM Codes for Other Forms of Heart Disease
ICD Code	Description	Diagnosis
I30.0	Acute nonspecific idiopathic pericarditis	Acute inflammation of the pericardium without a specific identified cause
I31.0	Chronic adhesive pericarditis	Long-term inflammation of the pericardium resulting in adhesions
I32.0	Infective endocarditis, valve unspecified	Infection and inflammation of the endocardium, with the specific valve affected not specified
I34.0	Nonrheumatic mitral (valve) insufficiency	Mitral valve insufficiency not caused by rheumatic fever
I35.0	Nonrheumatic aortic (valve) stenosis	Aortic valve stenosis unrelated to rheumatic fever
I42.0	Dilated cardiomyopathy	Enlargement and weakening of the heart muscle, leading to impaired function
I43.1	Dilated cardiomyopathy in diseases classified elsewhere	Dilated cardiomyopathy as a complication of another disease
I44.0	Atrioventricular block, first degree	Abnormal delay in the electrical conduction between the atria and ventricles
I45.6	Pre-excitation syndrome	Abnormal conduction pathway in the heart, leading to rapid heart rates
I50.9	Heart failure, unspecified	General diagnosis of heart failure without specifying the cause or type

ICD-10-CM Code I60-I69: Cerebrovascular Diseases

Cerebrovascular diseases refer to a group of medical conditions that affect the blood vessels and blood supply to the brain. These diseases often involve abnormalities in the arteries supplying blood to the brain, leading to complications such as reduced blood flow, clot formation, or vessel rupture.

Key ICD-10-CM Codes for Cerebrovascular Diseases
ICD Code	Description	Diagnosis
I63.0	Cerebral infarction due to thrombosis of precerebral arteries	Ischemic stroke resulting from a blood clot in precerebral arteries
I61.9	Intracerebral hemorrhage, unspecified	Hemorrhagic stroke without specifying the location within the brain
I67.1	Cerebral aneurysm, non-ruptured	An unruptured cerebral aneurysm or a bulging or weakened area in the wall of a blood vessel in the brain
I66.9	Occlusion and stenosis of unspecified cerebral artery	Narrowing or blockage of an unspecified cerebral artery, potentially leading to ischemic stroke
I62.9	Subarachnoid hemorrhage, unspecified	Hemorrhage in the subarachnoid space, often caused by a ruptured cerebral aneurysm
I67.89	Other cerebrovascular diseases	Other specified cerebrovascular diseases not covered by more specific codes
I68.0	Cerebral vascular disorders in diseases classified elsewhere	Cerebrovascular disorders occurring as complications of other diseases
I63.9	Cerebral infarction, unspecified	Unspecified cerebral infarction, indicating an ischemic stroke without specifying the location
I74.9	Embolism and thrombosis of unspecified artery	Embolism or thrombosis affecting an unspecified artery, which may lead to ischemic stroke

ICD-10-CM Code I70-I79: Diseases of Arteries, Arterioles, and Capillaries

This category focuses on disorders related to arteries (large blood vessels that carry oxygenated blood away from the heart), arterioles (smaller arteries), and capillaries (the smallest blood vessels where oxygen and nutrients exchange with tissues).

Key ICD-10-CM Codes for Diseases of Arteries, Arterioles, and Capillaries
ICD Code	Description	Diagnosis
I70.0	Atherosclerosis of aorta	A buildup of plaque leading to atherosclerosis in the main artery, the aorta
I71.9	Aortic aneurysm of the unspecified site	Abnormal enlargement of the aorta without specifying the location
I73.9	Peripheral vascular disease, unspecified	Unspecified peripheral vascular disease, indicating disorders affecting blood vessels in the extremities
I67.2	Cerebral atherosclerosis	Atherosclerosis affecting arteries in the brain, potentially contributing to stroke risk
I77.9	Disorder of arteries and arterioles, unspecified	An unspecified disorder affecting arteries and arterioles
I78.0	Hereditary hemorrhagic telangiectasia	A genetic disorder causing abnormal blood vessel formation and potential bleeding
I74.9	Embolism and thrombosis of unspecified artery	Embolism or thrombosis affecting an unspecified artery, potentially leading to vascular issues

ICD-10-CM Code I80-I89: Diseases of Veins, Lymphatic Vessels, and Lymph Nodes, Unclassified

Conditions within this category can involve a range of issues affecting the vascular and lymphatic systems, including inflammation, thrombosis (clot formation), obstruction, and other structural or functional abnormalities.

Key ICD-10-CM Codes for Diseases of Veins, Lymphatic Vessels, and Lymph Nodes, Unclassified
ICD Code	Description	Diagnosis
I80.9	Phlebitis and thrombophlebitis, unspecified	Inflammation of veins, often accompanied by clot formation, without specifying a particular location
I88.9	Nonspecific lymphadenitis, unspecified	Inflammation of lymph nodes without specifying a particular cause or location
I89.9	Lymphedema, unspecified	Swelling (edema) caused by the accumulation of lymph fluid, not specifying the underlying cause
I85.9	Esophageal varices without bleeding	Enlarged and swollen veins in the esophagus without active bleeding, often associated with liver disease
I97.1	Postmastectomy lymphedema syndrome	Swelling of the arm or chest following surgical removal of lymph nodes during mastectomy
I89.0	Lymphedema, not elsewhere classified	Lymphedema not fitting into a more specific category
I81.9	Portal vein thrombosis, unspecified	Formation of a blood clot in the portal vein without specifying a particular location
I86.9	Varicose veins of unspecified lower extremity	Enlarged and twisted veins in the lower extremities without specifying a particular location
I97.2	Postprocedural lymphedema syndrome	Swelling occurring after certain medical procedures, often related to lymphatic system disruption
I89.1	Lymphangitis, unspecified	Inflammation of lymphatic vessels without specifying a particular location

Further Reading:

Conclusion

The meticulous classification within this ICD-10 code I00-I99 enables healthcare professionals to navigate and understand the diversity of circulatory disorders, ranging from acute events like rheumatic fever to chronic conditions. As medical knowledge advances, the continued refinement and utilization of these codes will undoubtedly contribute to improved patient outcomes and a deeper comprehension of the intricate workings of the human cardiovascular system.

‍Disclaimer: The information provided in this blog regarding the International Classification of Diseases (ICD) codes is intended for informational purposes only. We strive to offer accurate and up-to-date content. However, the ICD codes are subject to changes, updates, and modifications by authoritative bodies such as the Centers for Disease Control and Prevention (CDC), the World Health Organization (WHO), and other relevant healthcare organizations. These changes can occur due to advancements in medical knowledge, new diseases, evolving diagnostic criteria, or updates in medical terminology.

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