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Chapters ENES DE

XExtension Codes
Anatomy and topography
Functional anatomy
Circulatory system
XA4PM9Cardiovascular system
XA6H07Heart

XA78X5 category

Interatrial septum

Also indexed as

Interatrial septum

Nearby in Heart

XA6548Left atrium
XA6T92Right atrium
XA8FJ7Left ventricle
XA5651Interventricular septum
XA9HH8Right ventricle
XA3B03Coronary arteries
XA9FK9Cardiac veins
XA10E0Chamber of the heart

PreviousXA6548 — Left atrium NextXA6T92 — Right atrium

Browse ICD-11

01Certain infectious or parasitic diseases
02Neoplasms
03Diseases of the blood or blood-forming organs
04Diseases of the immune system
05Endocrine, nutritional or metabolic diseases
06Mental, behavioural or neurodevelopmental disorders
07Sleep-wake disorders
08Diseases of the nervous system
09Diseases of the visual system
10Diseases of the ear or mastoid process
11Diseases of the circulatory system
12Diseases of the respiratory system
13Diseases of the digestive system
14Diseases of the skin
15Diseases of the musculoskeletal system or connective tissue
16Diseases of the genitourinary system
17Conditions related to sexual health
18Pregnancy, childbirth or the puerperium
19Certain conditions originating in the perinatal period
20Developmental anomalies
21Symptoms, signs or clinical findings, not elsewhere classified
22Injury, poisoning or certain other consequences of external causes
23External causes of morbidity or mortality
24Factors influencing health status or contact with health services
25Codes for special purposes
26Supplementary Chapter Traditional Medicine Conditions
VSupplementary section for functioning assessment
XExtension Codes
Severity Scale Value
Temporality
Aetiology
Topology Scale Value
Anatomy and topography
Histopathology
Dimensions of injury
Dimensions of external causes
Consciousness
5 more
Functional anatomy
Surface topography
Partonomic view
Endocrine system
Nervous system
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Auditory system
Circulatory system
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Integumentary system
Musculoskeletal system
3 more
XA4PM9Cardiovascular system
Lymphatic system
XA5999Arteries
XA5J49Veins
XA21T7Blood Vessels
XA6H07Heart
XA6548Left atrium
XA78X5Interatrial septum
XA6T92Right atrium
XA8FJ7Left ventricle
XA5651Interventricular septum
XA9HH8Right ventricle
XA3B03Coronary arteries
XA9FK9Cardiac veins
XA10E0Chamber of the heart
XA3113Connective and other soft tissue of heart
XA6CK2Heart wall
XA79Z5Cardiac electrical conducting system
XA0QB6Heart valve
XA8SK6Myocardium

International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).

Release 2026-01. View this entity in the official WHO ICD-11 browser.

This page reproduces WHO classification content for reference. It is not medical advice and must not be used to diagnose or treat. For coding decisions, consult the official release and your national coding guidelines.

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