I00-I99
ICD-10-CM Chapter 9: Diseases of the circulatory system
Chapter 9 of the ICD-10-CM tabular list covers I00-I99. It contains 10 blocks of related categories, listed below with the categories published in each.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- 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, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
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 pericarditiscategory
- I31Other diseases of pericardiumcategory
- I32Pericarditis in diseases classified elsewhere
- I33Acute and subacute endocarditiscategory
- I34Nonrheumatic mitral valve disorderscategory
- I35Nonrheumatic aortic valve disorderscategory
- I36Nonrheumatic tricuspid valve disorderscategory
- I37Nonrheumatic pulmonary valve disorderscategory
- I38Endocarditis, valve unspecified
- I39Endocarditis and heart valve disord in dis classd elswhr
- I40Acute myocarditiscategory
- I41Myocarditis in diseases classified elsewhere
- I42Cardiomyopathycategory
- I43Cardiomyopathy in diseases classified elsewhere
- I44Atrioventricular and left bundle-branch blockcategory
- I45Other conduction disorderscategory
- I46Cardiac arrestcategory
- I47Paroxysmal tachycardiacategory
- I48Atrial fibrillation and fluttercategory
- I49Other cardiac arrhythmiascategory
- I50Heart failurecategory
- I51Complications and ill-defined descriptions of heart diseasecategory
- I52Other heart disorders in diseases classified elsewhere
- I5ANon-ischemic myocardial injury (non-traumatic)
I60-I69: Cerebrovascular diseases
- I60Nontraumatic subarachnoid hemorrhagecategory
- I61Nontraumatic intracerebral hemorrhagecategory
- I62Other and unspecified nontraumatic intracranial hemorrhagecategory
- I63Cerebral infarctioncategory
- I65Occls and stenosis of precerb art, not rslt in cereb infrccategory
- I66Occls and stenosis of cereb art, not rslt in cerebral infrccategory
- I67Other cerebrovascular diseasescategory
- I68Cerebrovascular disorders in diseases classified elsewherecategory
- I69Sequelae of cerebrovascular diseasecategory
I70-I79: Diseases of arteries, arterioles and capillaries
- I70Atherosclerosiscategory
- I71Aortic aneurysm and dissectioncategory
- I72Other aneurysmcategory
- I73Other peripheral vascular diseasescategory
- I74Arterial embolism and thrombosiscategory
- I75Atheroembolismcategory
- I76Septic arterial embolism
- I77Other disorders of arteries and arteriolescategory
- I78Diseases of capillariescategory
- I79Disord of art, arterioles and capilare in dis classd elswhrcategory
I80-I89: Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified
- I80Phlebitis and thrombophlebitiscategory
- I81Portal vein thrombosis
- I82Other venous embolism and thrombosiscategory
- I83Varicose veins of lower extremitiescategory
- I85Esophageal varicescategory
- I86Varicose veins of other sitescategory
- I87Other disorders of veinscategory
- I88Nonspecific lymphadenitiscategory
- I89Oth noninfective disorders of lymphatic vessels and nodescategory
I95-I99: Other and unspecified disorders of the circulatory system
Source
ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.