Circular 06/2026
Chapter IX — Diseases of the circulatory system
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I00-I02 — Acute rheumatic fever
I05-I09 — Chronic rheumatic heart diseases
I10-I15 — Hypertensive diseases
I20-I25 — Ischaemic heart diseases
I26-I28 — Pulmonary heart disease and diseases of pulmonary circulation
I30-I52 — Other forms of heart disease
I30Acute pericarditisI31Other diseases of pericardiumI32*Pericarditis in diseases classified elsewhereI33Acute and subacute endocarditisI34Nonrheumatic mitral valve disordersI35Nonrheumatic aortic valve disordersI36Nonrheumatic tricuspid valve disordersI37Pulmonary valve disordersI38Endocarditis, valve unspecifiedI39*Endocarditis and heart valve disorders in diseases classified elsewhereI40Acute myocarditisI41*Myocarditis in diseases classified elsewhereI42CardiomyopathyI43*Cardiomyopathy in diseases classified elsewhereI44Atrioventricular and left bundle-branch blockI45Other conduction disordersI46Cardiac arrestI47Paroxysmal tachycardiaI48Atrial fibrillation and flutterI49Other cardiac arrhythmiasI50Heart failureI51Complications and ill-defined descriptions of heart diseaseI52*Other heart disorders in diseases classified elsewhere
I60-I69 — Cerebrovascular diseases
I60Subarachnoid haemorrhageI61Intracerebral haemorrhageI62Other nontraumatic intracranial haemorrhageI63Cerebral infarctionI64Stroke, not specified as haemorrhage or infarctionI65Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarctionI66Occlusion and stenosis of cerebral arteries, not resulting in cerebral infarctionI67Other cerebrovascular diseasesI68*Cerebrovascular disorders in diseases classified elsewhereI69Sequelae of cerebrovascular disease
I70-I79 — Diseases of arteries, arterioles and capillaries
I70AtherosclerosisI71Aortic aneurysm and dissectionI72Other aneurysm and dissectionI73Other peripheral vascular diseasesI74Arterial embolism and thrombosisI77Other disorders of arteries and arteriolesI78Diseases of capillariesI79*Disorders of arteries, arterioles and capillaries in diseases classified elsewhere
I80-I89 — Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
I80Phlebitis and thrombophlebitisI81Portal vein thrombosisI82Other venous embolism and thrombosisI83Varicose veins of lower extremitiesI85Oesophageal varicesI86Varicose veins of other sitesI87Other disorders of veinsI88Nonspecific lymphadenitisI89Other noninfective disorders of lymphatic vessels and lymph nodes