# ICD-10 Coding/Diseases of the Circulatory System
## Objectives and Skills
#### Part 1: Diagnoses

Apply ICD-10-CM coding guidelines for accurate selection and sequencing of diagnosis codes commonly used to describe Diseases of the Circulatory System:

#### Part 2: Procedures

Apply ICD-10-PCS coding guidelines for accurate selection of procedure codes commonly used to treat Diseases of the Circulatory System.

## Guidelines with Coding Examples
### Part 1: Diagnoses

* Guidelines Introduction Video
* Chapter 9 Guidelines Powerpoint
* Introduction to Chapter 9 Section A Guidelines

#### a. Hypertension

* Hypertension with Heart Disease.
* Hypertensive Chronic Kidney Disease
* Hypertensive Heart and Chronic Kidney Disease
* Hypertensive Cerebrovascular DiseaseCG 1.C.9.a.4 Cerebral Aneurysm
* Hypertensive Retinopathy
* Hypertension, Secondary
* Hypertension, Transient
* Hypertension, Controlled
* Hypertension, Uncontrolled
* Hypertensive Crisis
* Hypertensive Urgency versus Emergency
* CG 1.C.9.a.11 Pulmonary HypertensionPulmonary Hypertension

#### b. Atherosclerotic Coronary Artery Disease and Angina |

* Guideline

#### c. Intraoperative and Postprocedural Cerebrovascular Accident |

* Guideline

#### d. Sequelae of Cerebrovascular Disease

* Category I69, Sequelae of Cerebrovascular disease
* Codes from category I69 with codes from I60-I67
* Codes from category I69 and Personal history of transient ischemic attack (TIA) and cerebral infarction (Z86.73)

#### e. Acute myocardial infarction (AMI)

* Type 1 ST elevation myocardial infarction (STEMI) and non-ST elevation myocardial infarction (NSTEMI).
* Acute myocardial infarction, unspecified.
* AMI documented as nontransmural or subendocardial but site provided
* Subsequent acute myocardial infarction.
* Other Types of Myocardial Infarction

### Part 2: Procedures

Apply ICD-10-PCS coding guidelines for accurate selection of procedure codes commonly used to diagnose and treat Diseases of the Circulatory System.
* PCS Root Operation Groups - Ahima
* CMS 2018 PCS Guidelines

#### Coding Cardiovascular Procedures

* Guidelines Powerpoint | Guidelines Intro | B3.6b | B3.6c | B3.9 | B4.4
* Root Operator Powerpoint | Root Operator Intro | Byapss | Destruction | Map | Dilation | Insertion | Measurement | Replacement | Supplement | Performance
* Case Studies Powerpoint | Coronary Artery Bypass Graft (CAGB) x4 | Left Cardiac Catheterization with PTCA | Dual Chamber Cardiac Pacemaker and Leads

## Learning Resources

* ACC Hit Program 2019 Chapter 9 Guidelines Coding Scenerios for each guideline.
* Khan Academy Lessons on Circulatory System Diseases, Symptoms, and Procedures to detect them.
* ICD-10-CM Coding Guidelines: Read Chapter 9 guidelines, pages 46-52
* 2019 ICD-10-PCS Coding Guidelines
* 9 Common Heart Surgeries

#### Procedures Videos

* Heart CatheterizationCardiac Catheterization - Venous Access Port CatheterDiagnostic Cardiac Catheterization | video 1 | video 2
* Angiocardiography.
* Angiography coronary stenosisIntraoperative Fluorescence Vascular Angiography
* Implant of Automatic Cardioverter Defibrillator
* Percutaneous Mitral Valve Repair
* Percutaneous Aortic and Pulmonary Valve Repair
* PTCA StentPercutaneous Balloon Valvuloplasty
* Percutaneous Transluminal Coronary Angioplasty
* AtherectomyTransluminal Coronary Atherectomy
* Coronary Artery Bypass Graft (CABG)Coronary Artery Bypass Graft Video
* Thoracoscopic and Thoracoscopically Assisted Ablation of Heart Tissue (Maze Procedure)
* Totally Implantable and Tunneled Vascular Access Devices

## Activities

* HITNOTS.com | Circulatory Coding Quiz | Circulatory Anatomy Quiz | Circulatory Pharmacology Quiz | Circulatory Terminology Quiz |
* Label (Download, print, label and submit) | *Heart - see image on lower rightHeart to Label | *Circulatory System - see image on lower rightCirculatory System to Label |

## Lesson Summary
###### Review

* Heart and Circulatory System by labeling parts (see Activities)
* Key Diagnosis (see Key Terms)
* Diagnosis Guidelines and Code Scenarios (see Guidelines and Coding Examples)
* Procedure Guidelines and Code Scenarios (see Guidelines and Coding Examples)

###### Assessment

* Procedures, Diagnosis and Root Operator Assessment Quiz
* HITNOTS.com circulatory coding quizzes
* Quizlet ~ ICD-10-CM Guidelines

###### Further clarity provided with learning resources.
## Key Terms
### Diagnosis

* Angina A condition marked by severe pain in the chest, often also spreading to the shoulders, arms, and neck, caused by an inadequate blood supply to the heart.
* Atherosclerotic Coronary Artery Disease (Also known as: Atherosclerosis, arteriosclerosis, coronary heart disease, hardening of the arteries) Coronary artery disease (CAD) is a condition which affects the arteries that supply the heart with blood. It is usually caused by atherosclerosis which is a buildup of plaque inside the artery walls.
* Cerebrovascular AccidentCerebrovascular accident (CVA) is the medical term for a stroke. A stroke is when blood flow to a part of your brain is stopped either by a blockage or the rupture of a blood vessel. There are important signs of a stroke that you should be aware of and watch out for.
* Cerebrovascular DiseaseCerebrovascular disease includes a variety of medical conditions that affect the blood vessels of the brain and the cerebral circulation. ... Narrowed cerebral arteries can lead to ischemic stroke, but continually elevated blood pressure can also cause tearing of vessels, leading to a hemorrhagic stroke.
* Chronic Kidney DiseaseChronic kidney disease (CKD) means your kidneys are damaged and can't filter blood the way they should. The main risk factors for developing kidney disease are diabetes, high blood pressure, heart disease, and a family history of kidney failure.
* Diastolic Heart FailureDiastolic heart failure means the lower left chamber of the heart (left ventricle) is not able to fill properly with blood during the diastolic phase, reducing the amount of blood pumped out to the body.
* Heart DiseaseCardiovascular disease generally refers to conditions that involve narrowed or blocked blood vessels that can lead to a heart attack, chest pain (angina) or stroke. Other heart conditions, such as those that affect your heart's muscle, valves or rhythm, also are considered forms of heart disease.
* Hypertension High blood pressure (HBP or hypertension) is when your blood pressure, the force of your blood pushing against the walls of your blood vessels, is consistently too high.
* Hypertensive Crisis A hypertensive crisis is a severe increase in blood pressure that can lead to a stroke. Extremely high blood pressure — a top number (systolic pressure) of 180 millimeters of mercury (mm Hg) or higher or a bottom number (diastolic pressure) of 120 mm Hg or higher — can damage blood vessels.
* Myocardial InfarctionAlso known as a heart attack which is a sudden and sometimes fatal occurrence of coronary thrombosis, typically resulting in the death of part of a heart muscle.
* Pulmonary HypertensionPulmonary hypertension is a life-threatening condition that gets worse over time, but treatments can help symptoms. Having pulmonary arterial hypertension (PAH) means that you have high blood pressure in the arteries that go from your heart to your lungs.
* RetinopathyHypertensive retinopathy is retinal vascular damage caused by hypertension. Signs usually develop late in the disease. Funduscopic examination shows arteriolar constriction, arteriovenous nicking, vascular wall changes, flame-shaped hemorrhages, cotton-wool spots, yellow hard exudates, and optic disk edema.
* Systolic Heart Disease Heart failure with reduced ejection fraction (HFrEF), also called systolic failure: The left ventricle loses its ability to contract normally. The heart can't pump with enough force to push enough blood into circulation. ... The heart can't properly fill with blood during the resting period between each beat.

### Procedures

9 Common Heart Surgeries: From Minimally Invasive to Transplant
* Transmyocardial Laser Revascularization (TMR) – This procedure is usually performed to treat angina when no other treatments work. A small incision is done in the chest to expose the heart muscle, and a high-energy laser is used to make one millimeter wide channels inside the heart. The outer areas of the channels are closed, but the inner ones remain open to improve blood flow. It isn’t fully understood how TMR works, but there is evidence this surgery helps the heart grow tiny new blood vessels, which relieve angina.3
* Heart Valve Repair or Replacement – In most cases, this is an open heart operation. The surgeon opens the chest and heart to remove a damaged valve and a prosthetic one is sewn into place. There are some cases where the valve can be replaced through a small incision near the breastbone, making the surgery a minimally invasive one.4
* Heart Transplant – This type of surgery removes the patient’s diseased heart and replaces it with a healthy heart from a deceased donor. This operation is for patients who have end-stage heart failure, or for people whose heart is very damaged and weak.5
* Arrhythmia Treatment – Although many arrhythmias are harmless, some can be serious and even life threatening. An abnormal heart rate may not pump enough blood to the body, and it may damage the brain and other organs in the body. Some arrhythmias are treated with a pacemaker – a small device that gets placed under the skin of your chest. This device sends electrical pulses to help the heart beat at a normal rate. Another way to treat arrhythmias is an implantable cardioverter defibrillator (ICD). This device is also placed under the skin of your chest and uses electrical pulses to control arrhythmias. The ICD monitors the heart continuously, if it senses a dangerous arrhythmia, it sends an electric shock to the heart to restore it.6
* Aneurysm Repair – An aneurysm is a bulging or an out-pouching portion of a blood vessel. It can occur anywhere in the body, but it is particularly dangerous if it occurs in the aorta. This may happen when the artery wall weakens, and the blood moving through the artery makes the weak area An aneurysm can burst and cause fatal bleeding inside the body, hence repair surgery is performed prophylactically. The dilated part of the vessel gets removed and replaced with a graft, or synthetic material that won’t break.7
* Angioplasty – This minimally invasive procedure is used to widen narrowed or obstructed arteries or veins. A deflated balloon is attached to a catheter, passed over a guide-wire into the narrow vessel, and then inflated to a fixed size. Sometimes, a stent is inserted to make sure the vessel remains open, then the balloon gets deflated and removed.8
* Cardiomyoplasty – This surgical procedure takes healthy muscle from another part of the body, usually the latissimus dorsi from the patient’s back; and then it gets wrapped around the heart to provide support. A special pacemaker is also inserted to make the skeletal muscle contract.9
* Minimally Invasive Heart Surgery – Is performed to do some bypass, heart valve replacement, insert pacemakers, or use another vein or artery from the body to use it as a graft. As it name suggests, the chest is not cut open, but rather small incisions are made in the right side of the chest, and the surgeon operates between the ribs. The patient experiences less pain and quicker recovery, while it also gives the surgeon a better view of some portions of the heart versus an open-heart surgery.

## See Also
### Guidelines

* 2019 ICD-10-CM Official Guidelines for Coding and Reporting FY 2019(October 1, 2018 - September 30, 2019)
* 2019 ICD-10 PCS
* Wikipedia, ICD-10 Chapter IX: Diseases of the Circulatory System

### Anatomy/Physiology

* MedicalCodingCert: | Part 1 | Part 2 |
* Circulatory System Animation

### Coding Clinic

* Ahima Coffee and Code. Arteriovenous Graft Revision Coding Clinic. Free Ahima Webinar for members.

## I00–I99 – Diseases of the circulatory system
### World Health Organization ICD-10 Training Tool > see Chapter 9, Circulatory System

* Coding: Review of Chapter (introduction, overview, review, self-check test, exercises and summary)
* Medical Science (anatomy/physiology, diseases and self-check test)
Be mindful when using this tool, that the United States Clinical Modifications are not included. Coding exercises may not display the correct ICD-10-CM (Clinical Modifications) specific to the United States

### Chapter IX, ICD-10

Produced by the World Health Organization, it is used in several countries around the world. Some have gone on to develop their own national enhancements, building off the international version of the classification.
Chapter IX of ICD-10 deals with conditions affecting the circulatory system. Examples of conditions captured using codes from Chapter IX include; Rheumatic fever, Myocardial infarction heart attack, and strokes.

### (I00–I02) Acute rheumatic fever

* (I00) Rheumatic fever without mention of heart involvement
* (I01) Rheumatic fever with heart involvement
** Pericarditis(I01.0) Acute rheumatic pericarditis
** Endocarditis(I01.1) Acute rheumatic endocarditis
** (I01.2) Acute rheumatic myocarditis
** Rheumatic fever & heart disease(I01.8) Other acute rheumatic heart disease
** (I01.9) Acute rheumatic heart disease, unspecified
* (I02) Rheumatic chorea

### (I05–I09) Chronic (medicine)|Chronic rheumatic heart diseases

* (I05) Rheumatic mitral valve diseases
** (I05.0) Mitral stenosis
** (I05.1) Rheumatic mitral insufficiency
** (I05.2) Mitral stenosis with mitral insufficiency|insufficiency
* (I06) Rheumatic aortic valve diseases
** (I06.0) Rheumatic aortic stenosis
** (I06.1) Rheumatic aortic insufficiency
** (I06.2) Rheumatic aortic stenosis with Aortic insufficiency|insufficiency
* (I07) Rheumatic tricuspid valve diseases
** (I07.0) Tricuspid stenosis
** (I07.1) Tricuspid insufficiency
** (I07.2) Tricuspid stenosis with Tricuspid insufficiency|insufficiency
* (I08) Multiple valve diseases
** (I08.0) Disorders of both mitral and aortic valves
** (I08.1) Disorders of both mitral and tricuspid valves
** (I08.2) Disorders of both aortic and tricuspid valves
** (I08.3) Combined disorders of mitral, aortic and tricuspid valves
* (I09) Other rheumatic heart diseases
** (I09.0) Rheumatic myocarditis
** (I09.1) Rheumatic diseases of endocardium, valve unspecified
** (I09.2) Chronic rheumatic pericarditis
** (I09.9) Rheumatic heart disease, unspecified

### (I10–I15) Hypertensive diseases

* (I10) Essential (primary) hypertension
** Arterial hypertension
** High blood pressure
* (I11) Hypertensive heart disease
* (I12) Hypertensive renal disease
** Hypertensive nephropathy
* (I13) Hypertensive heart disease and Hypertensive renal disease
* (I15) Secondary hypertension
** (I15.0) Renovascular hypertension

### (I20–I25) Ischemic heart diseases

* Angina pectoris(I20) Angina pectoris
** (I20.0) Unstable angina
** (I20.1) Angina pectoris with documented spasm
*** Prinzmetal's angina
** (I20.8) Other forms of angina pectoris
** (I20.9) Angina pectoris, unspecified
* (I21) Acute myocardial infarction
* (I22) Subsequent myocardial infarction
* (I23) Certain current complications following acute myocardial infarction
** (I23.0) Haemopericardium as current complication following acute myocardial infarction
** (I23.1) Atrial septal defect as current complication following acute myocardial infarction
** Ventricular septal defect(I23.2) Ventricular septal defect as current complication following acute myocardial infarction
** (I23.3) Rupture of cardiac wall without haemopericardium 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 (heart)|atrium, Right atrium|auricular appendage, and Ventricle (heart)|ventricle as current complications following acute myocardial infarction
** (I23.8) Other current complications following acute myocardial infarction
* Ischaemic heart diseases(I24) Other acute ischemic heart diseases
** (I24.0) Coronary thrombosis not resulting in myocardial infarction
** (I24.1) Dressler's syndrome
* (I25) Chronic ischaemic heart disease
** (I25.0) Atherosclerotic cardiovascular disease, so described
** (I25.1) Atherosclerotic heart disease
** (I25.2) Old myocardial infarction
** Aneurysm of heart(I25.3) Aneurysm of heart
** (I25.4) Coronary artery aneurysm
** (I25.5) Ischaemic cardiomyopathy
** (I25.6) Silent myocardial ischaemia
** (I25.8) Other forms of chronic ischaemic heart disease
** (I25.9) Chronic ischaemic heart disease, unspecified

### (I26–I28) Pulmonary heart disease and diseases of pulmonary circulation

* (I26) Pulmonary embolism
* (I27) Other pulmonary heart diseases
** (I27.0) Primary pulmonary hypertension
** (I27.1) Kyphoscoliotic heart disease
** (I27.2) Other secondary pulmonary hypertension
** (I27.8) Other specified pulmonary heart diseases
** (I27.9) Pulmonary heart disease, unspecified
* (I28) Other diseases of pulmonary vessels
** Arteriovenous fistula(I28.0) Arteriovenous fistula of pulmonary vessels
** (I28.1) Aneurysm of pulmonary artery
** (I28.8) Other specified diseases of pulmonary vessels
** (I28.9) Disease of pulmonary vessels, unspecified

### (I30–I52) Other forms of heart disease
#### Pericardium

* (I30) Acute pericarditis
* (I31) Other diseases of pericardium
** (I31.0) Chronic adhesive pericarditis
** (I31.1) Chronic constrictive pericarditis
** (I31.2) Haemopericardium, not elsewhere classified
** (I31.3) Pericardial effusion (noninflammatory)
** (I31.8) Other specified diseases of pericardium
** (I31.9) Disease of pericardium, unspecified
*** Cardiac tamponade
* (I32) Pericarditis in diseases classified elsewhere

#### Endocardium (including heart valves)

* (I33) Acute and subacute endocarditis
* (I34) Nonrheumatic mitral valve disorders
** (I34.0) Mitral (valve) insufficiency
*** Mitral regurgitationMitral regurgitation
** (I34.1) Mitral valve prolapse|Mitral (valve) prolapse
** (I34.2) Nonrheumatic Mitral stenosis|mitral (valve) stenosis
* (I35) Nonrheumatic aortic valve disorders
** (I35.0) Aortic valve stenosis|Aortic (valve) stenosis
** (I35.1) Aortic (valve) insufficiency
** (I35.2) Aortic valve stenosis|Aortic (valve) stenosis with Aortic insufficiency|insufficiency
* (I36) Nonrheumatic tricuspid valve disorders
** (I36.0) Nonrheumatic tricuspid (valve) stenosis
** (I36.1) Nonrheumatic tricuspid (valve) insufficiency
** (I36.2) Nonrheumatic tricuspid (valve) stenosis with Tricuspid insufficiency|insufficiency
* (I37) Pulmonary valve disorders
** (I37.0) Pulmonary valve stenosis
** (I37.1) Pulmonary valve insufficiency
** (I37.2) Pulmonary valve stenosis with Pulmonary valve insufficiency|insufficiency
* (I38) Endocarditis, valve unspecified
* (I39) Endocarditis and heart valve disorders in diseases classified elsewhere

#### Myocardium / cardiomyopathy

* (I40) Acute myocarditis
* (I41) Myocarditis in diseases classified elsewhere
* (I42) Cardiomyopathy
** (I42.0) Dilated cardiomyopathy
** (I42.1) Obstructive hypertrophy cardiomyopathy
** (I42.2) Other hypertrophic cardiomyopathy
** (I42.3) Endomyocardial (eosinophilic) disease
*** Eosinophilic myocarditis
*** Endomyocardial (tropical) fibrosis
*** CardiomegalyLöffler's endocarditis
** (I42.4) Endocardial fibroelastosis
** (I42.5) Other restrictive cardiomyopathy
** (I42.6) Alcoholic cardiomyopathy
** (I42.8) Other cardiomyopathies
*** Arrhythmogenic right ventricular dysplasiaArrhythmogenic right ventricular dysplasia
* (I43) Cardiomyopathy in diseases classified elsewhere

#### Other

* (I50) Heart failure
** (I50.0) Congestive heart failure
*** Congestive heart failure
** (I50.1) Left ventricular failure
*** Cardiac asthma
** (I50.9) Heart failure, unspecified
* (I51) Complications and ill-defined descriptions of heart disease
** (I51.0) Cardiac septal defect, acquired
** (I51.1) Rupture of chordae tendineae, not elsewhere classified
** (I51.2) Rupture of papillary muscle, not elsewhere classified
** (I51.3) Intracardiac thrombosis, not elsewhere classified
** (I51.4) Myocarditis, unspecified
** (I51.5) Myocardial degeneration
** (I51.6) Cardiovascular disease, unspecified
** (I51.7) Cardiomegaly
*** Ventricular hypertrophy
**** Left ventricular hypertrophy
** (I51.8) Other ill-defined heart diseases
** (I51.9) Heart disease, unspecified
* (I52) Other heart disorders in diseases classified elsewhere

### (I60–I69) Cerebrovascular diseases

* Subarachnoid hemorrhage(I60) Subarachnoid hemorrhage
** (I60.0) Subarachnoid haemorrhage from carotid siphon and bifurcation
** (I60.1) Subarachnoid haemorrhage from middle cerebral artery
** (I60.2) Subarachnoid haemorrhage from anterior communicating artery
** (I60.3) Subarachnoid haemorrhage from posterior communicating artery
** (I60.4) Subarachnoid haemorrhage from basilar artery
** (I60.5) Subarachnoid haemorrhage from vertebral artery
** (I60.6) Subarachnoid haemorrhage from other intracranial arteries
** (I60.7) Subarachnoid haemorrhage from intracranial artery, unspecified
* Intracerebral haemorrhage(I61) Intracerebral haemorrhage
** (I61.0) Intracerebral haemorrhage in hemisphere, subcortical
** (I61.1) Intracerebral haemorrhage in hemisphere, cortical
** (I61.2) Intracerebral haemorrhage in Cerebral hemispheres|hemisphere, unspecified
** (I61.3) Intracerebral haemorrhage in brain stem
** (I61.4) Intracerebral haemorrhage in cerebellum
** (I61.5) Intracerebral haemorrhage, Intraventricular hemorrhage|intraventricular
** (I61.6) Intracerebral haemorrhage, multiple localized
* (I62) Other nontraumatic intracranial haemorrhage
** (I62.0) Subdural haemorrhage (acute)(nontraumatic)
** (I62.1) Nontraumatic extradural haemorrhage
*** Nontraumatic epidural haemorrhage
* Cerebral infarction(I63) Cerebral infarction
** (I63.0) Cerebral infarction due to thrombosis of precerebral arteries
** (I63.1) Cerebral infarction due to embolism of precerebral arteries
** (I63.2) Cerebral infarction due to unspecified Vascular occlusion|occlusion or stenosis of precerebral arteries
** (I63.3) Cerebral infarction due to thrombosis of cerebral arteries
** (I63.4) Cerebral infarction due to embolism of cerebral arteries
** (I63.5) Cerebral infarction due to unspecified Vascular occlusion|occlusion or stenosis of cerebral arteries
** (I63.6) Cerebral infarction due to cerebral venous thrombosis, nonpyogenic
* (I64) Stroke, not specified as hemorrhage or infarction
* (I65) Vascular occlusion|Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction
** (I65.0) Vascular occlusion|Occlusion and stenosis of vertebral artery
** (I65.1) Vascular occlusion|Occlusion and stenosis of basilar artery
** (I65.2) Vascular occlusion|Occlusion and stenosis of carotid artery
** (I65.3) Vascular occlusion|Occlusion and stenosis of multiple and wikt:bilateral|bilateral precerebral arteries
** (I65.8) Vascular occlusion|Occlusion and stenosis of other precerebral artery
** (I65.9) Vascular occlusion|Occlusion and stenosis of unspecified precerebral artery
* (I66) Vascular occlusion|Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarction
** (I66.0) Vascular occlusion|Occlusion and stenosis of middle cerebral artery
** (I66.1) Vascular occlusion|Occlusion and stenosis of anterior cerebral artery
** (I66.2) Vascular occlusion|Occlusion and stenosis of posterior cerebral artery
** (I66.3) Vascular occlusion|Occlusion and stenosis of cerebellar arteries
** (I66.4) Vascular occlusion|Occlusion and stenosis of multiple and wikt:bilateral|bilateral cerebral arteries
** (I66.5) Vascular occlusion|Occlusion and stenosis of other cerebral artery
** (I66.6) Vascular occlusion|Occlusion and stenosis of unspecified cerebral artery
* (I67) Other cerebrovascular diseases
** Cerebral aneurysm(I67.1) Cerebral aneurysm, nonruptured
** (I67.2) Cerebral atherosclerosis
** (I67.3) Progressive Blood vessel|vascular leukoencephalopathy
*** Binswanger's disease
** (I67.4) Hypertensive encephalopathy
** (I67.5) Moyamoya disease
** (I67.6) Nonpyogenic thrombosis of intracranial venous system
** (I67.7) Cerebral arteritis, not elsewhere classified
* (I68) Cerebrovascular disorders in diseases classified elsewhere
* (I69) Sequelae of cerebrovascular disease

### (I70–I79) Diseases of arteries, arterioles and capillaries

* Atherosclerosis(I70) Atherosclerosis
** arteriolosclerosis
** arteriosclerosis
** arteriosclerotic vascular disease
** atheroma
* (I71) Aortic aneurysm and Aortic dissection|dissection
** (I71.0) Dissection of aorta (any part)
** Aortic aneurysm(I71.1) Thoracic aortic aneurysm, ruptured
** (I71.2) Thoracic aortic aneurysm, without mention of rupture
** (I71.3) Abdominal aortic aneurysm, ruptured
** (I71.4) Abdominal aortic aneurysm, without mention of rupture
** (I71.5) Thoracoabdominal aortic aneurysm, ruptured
** (I71.6) Thoracoabdominal aortic aneurysm, without mention of rupture
** (I71.8) Aortic aneurysm of unspecified site, ruptured
** (I71.9) Aortic aneurysm of unspecified site, without mention of rupture
* (I72) Other aneurysm
* (I73) Other peripheral vascular diseases
** Raynaud's syndrome(I73.0) Raynaud's syndrome
** (I73.1) Thromboangiitis obliterans (Buerger)
** (I73.8) Other specified peripheral vascular diseases
*** Acrocyanosis
*** Acroparaesthesia
*** Erythrocyanosis
*** Erythromelalgia
** Peripheral arterial disease(I73.9) Peripheral vascular disease, unspecified
*** Intermittent claudication
*** Spasm of artery
* (I74) Arterial embolism and thrombosis
* (I77) Other disorders of arteries and arterioles
** (I77.0) Arteriovenous fistula, acquired
** (I77.1) Stricture of artery
** (I77.2) Rupture of artery
** (I77.3) Arterial fibromuscular dysplasia
** (I77.4) Coeliac artery compression syndrome
** (I77.5) Necrosis of artery
** (I77.6) Arteritis, unspecified
** (I77.8) Other specified disorders of arteries and arterioles
** (I77.9) Disorder of arteries and arterioles, unspecified
* (I78) Diseases of capillaries
** (I78.0) Hereditary haemorrhagic telangiectasia
** (I78.1) Naevus, non-neoplastic
*** naevus araneus
*** spider naevus
*** stellar naevus
** (I78.8) Other diseases of capillaries
** (I78.9) Disease of capillaries, unspecified
* (I79) Disorders of arteries, arterioles and capillaries in diseases classified elsewhere

### (I80–I89) Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified

* (I80) Phlebitis and thrombophlebitis
** (I80.0) Phlebitis and thrombophlebitis of superficial vessels of lower extremities
** (I80.1) Phlebitis and thrombophlebitis of femoral vein
** (I80.2) Phlebitis and thrombophlebitis of other deep vessels of lower extremities
*** Deep vein thrombosis NOS
* (I81) Portal vein thrombosis
* (I82) Other venous embolism and venous thrombosis
** (I82.0) Budd-Chiari syndrome
** (I82.1) Thrombophlebitis migrans
** (I82.2) Embolism and thrombosis of vena cava
** (I82.3) Embolism and Renal vein thrombosis|thrombosis of renal vein
** (I82.8) Embolism and thrombosis of other specified veins
*** Paget-Schroetter disease
* Varicose veins(I83) Varicose veins of lower extremities
** (I83.0) Varicose veins of lower extremities with ulcer
*** Varicose ulcer (lower extremity, any part)
** (I83.1) Varicose veins of lower extremities with inflammation
** (I83.2) Varicose veins of lower extremities with both ulcer and inflammation
** (I83.9) Varicose veins of lower extremities without ulcer or inflammation
* Hemorrhoids(I84) Haemorrhoids
** (I84.6) Residual haemorrhoidal skin tags
* (I85) Oesophageal varices
* (I86) Varicose veins of other sites
** (I86.0) Sublingual varices
** (I86.1) Scrotal varices
*** Varicocele
** (I86.2) Pelvic varices
** (I86.3) Vulval varices
** (I86.4) Gastric varices
** (I86.8) Varicose veins of other specified sites
* (I87) Other disorders of veins
** (I87.0) Postphlebitic syndrome
** (I87.1) Compression of vein
*** Superior vena cava syndrome
** (I87.2) Chronic venous insufficiency|Venous insufficiency (chronic)(peripheral)
** (I87.8) Other specified disorders of veins
** (I87.9) Disorder of vein, unspecified
* (I88) Nonspecific lymphadenitis
* (I89) Other noninfective disorders of lymphatic vessels and lymph nodes
** (I89.0) Lymphoedema, not elsewhere classified
** (I89.1) Lymphangitis
** (I89.8) Other specified noninfective disorders of lymphatic vessels and lymph nodes
** (I89.9) Noninfective disorder of lymphatic vessels and lymph nodes, unspecified

### (I95–I99) Other and unspecified disorders of the circulatory system

* (I95) Hypotension
** (I95.0) Idiopathic hypotension
** (I95.1) Orthostatic hypotension
** (I95.2) Hypotension due to drugs
** (I95.8) Hypotension, other
** (I95.9) Hypotension, unspecified
* (I97) Postprocedural disorders of circulatory system, not elsewhere classified
** (I97.0) Postcardiotomy syndrome
* (I98) Other disorders of circulatory system in diseases classified elsewhere
* (I99) Other and unspecified disorders of circulatory system

### Excludes

* 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, NEC (R00-R94)
* Systemic connective tissue disorders (M30-M36)
* Transient cerebral ischemic attack an related syndromes (G45.-)