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Chapters ENES DE

XExtension Codes
Anatomy and topography
Functional anatomy
Circulatory system
XA4PM9Cardiovascular system
XA6H07Heart
XA3B03Coronary arteries
XA0F62Left main coronary artery
XA7NQ7Left anterior descending coronary artery
XA2N78Diagonal branches of left anterior descending coronary artery

XA20E5 category

D1 - first diagonal branch

Also indexed as

D1 - first diagonal branch

Nearby in Diagonal branches of left anterior descending coronary artery

XA86J1D2 - second diagonal branch
XA5SR3D3 - third diagonal branch

NextXA86J1 — D2 - second diagonal branch

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
Visual system
Auditory system
Circulatory system
Respiratory system
Digestive system
Integumentary system
Musculoskeletal system
3 more
XA4PM9Cardiovascular system
Lymphatic system
XA5999Arteries
XA5J49Veins
XA21T7Blood Vessels
XA6H07Heart
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
5 more
XA0F62Left main coronary artery
XA2QX7Right coronary artery
XA9FX9Left circumflex artery
XA7NQ7Left anterior descending coronary artery
XA1SH6Left obtuse marginal artery
XA3QP2Ramus intermedius artery
XA5LW8Septal artery
XA2N78Diagonal branches of left anterior descending coronary artery
XA20E5D1 - first diagonal branch
XA86J1D2 - second diagonal branch
XA5SR3D3 - third diagonal branch

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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