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Chapters ENES DE

XExtension Codes
Anatomy and topography
Surface topography
XA6AS2Extremities
XA45A6Lower extremity
XA47V8Foot
XA4LC9Toes
XA4KK7Fourth toe
XA40R3Perionychium of fourth toe

XA4ZB3 category

Hyponychium of fourth toe

Also indexed as

Hyponychium of fourth toe

Nearby in Perionychium of fourth toe

XA2Y79Proximal nail fold of fourth toe
XA0XZ8Eponychium of fourth toe
XA0PV4Lateral nail fold of fourth toe

PreviousXA0PV4 — Lateral nail fold of fourth toe

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
XA1RS6Head and neck
XA3FR3Trunk
XA6AS2Extremities
XA4BA8Upper extremity
XA45A6Lower extremity
XA3VA7Buttock
XA5S78Thigh
XA8KL5Knee
XA3YG1Lower leg
XA67V4Ankle
XA47V8Foot
XA99M7Hindfoot
XA5151Midfoot
XA5YL1Forefoot
XA8BE2Dorsum of foot
XA1XM4Sole of foot
XA4LC9Toes
XA2RP7Great toe
XA8ZZ3Second toe
XA0SP3Third toe
XA4KK7Fourth toe
XA42W4Fifth toe
XA9LJ5Plantar surface of toe
XA7J49Dorsal surface of toe
XA14Y9Side of toe
XA9E36Toenail
XA40R3Perionychium of fourth toe
XA9316Pad of fourth toe
XA6TS5Fourth toenail
XA2Y79Proximal nail fold of fourth toe
XA0XZ8Eponychium of fourth toe
XA0PV4Lateral nail fold of fourth toe
XA4ZB3Hyponychium of fourth toe

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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