Skip to content

Chapters ENES DE

20Developmental anomalies
Chromosomal anomalies, excluding gene mutations
Sex chromosome anomalies

LD50 category

Number anomalies of chromosome X

6 subordinate codes

LD50.0Turner syndrome
LD50.1Karyotype 47,XXX
LD50.2Mosaicism, lines with various numbers of X chromosomes
LD50.3Klinefelter syndrome
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified

Nearby in Sex chromosome anomalies

LD51Structural anomalies of chromosome X, excluding Turner syndrome
LD52Number anomalies of chromosome Y
LD53Structural anomalies of chromosome Y
LD54Male with sex chromosome mosaicism
LD55Fragile X chromosome
LD56Chimaera 46, XX, 46, XY
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified

NextLD51 — Structural anomalies of chromosome X, excluding Turner syndrome

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
LA00-LD0ZStructural developmental anomalies primarily affecting one body system
LD20-LD2ZMultiple developmental anomalies or syndromes
LD40-LD7ZChromosomal anomalies, excluding gene mutations
LD90Conditions with disorders of intellectual development as a relevant clinical feature
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified
LD42Polyploidies
LD43Complete monosomies of the autosomes
LD44Deletions of the autosomes
LD45Uniparental disomies
LD46Imprinting errors
LD47Balanced rearrangements or structural rearrangements
LD50-LD5ZSex chromosome anomalies
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified
2 more
LD50Number anomalies of chromosome X
LD51Structural anomalies of chromosome X, excluding Turner syndrome
LD52Number anomalies of chromosome Y
LD53Structural anomalies of chromosome Y
LD54Male with sex chromosome mosaicism
LD55Fragile X chromosome
LD56Chimaera 46, XX, 46, XY
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified
LD50.0Turner syndrome
LD50.1Karyotype 47,XXX
LD50.2Mosaicism, lines with various numbers of X chromosomes
LD50.3Klinefelter syndrome
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified

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.

About · Data & methodology · Privacy · Contact