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Chapters ENES DE

XExtension Codes
Anatomy and topography
Functional anatomy
Musculoskeletal system
Bones
XA4S38Axial skeleton
XA5J55Vertebral column
XA02R1Intervertebral disc or space
XA2Y58Intervertebral disc

XA10M1 category

Annulus fibrosus

Also indexed as

Annulus fibrosus

Nearby in Intervertebral disc

XA8WM9Nucleus pulposus

PreviousXA8WM9 — Nucleus pulposus

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
Nervous system
Visual system
Auditory system
Circulatory system
Respiratory system
Digestive system
Integumentary system
Musculoskeletal system
Genitourinary system
3 more
Bones
Joints and ligaments
Cartilage
Muscles
Tendons
XA16K5Bursa
XA4S38Axial skeleton
XA4TM1Peripheral skeleton
XA4RY5Bones of the head
XA5J55Vertebral column
XA5VB6Bones of the thorax
XA4N47Bones of the pelvis
XA7MS2Vertebra
XA02R1Intervertebral disc or space
XA8D30Cervical discs or space
XA1N54Thoracic discs or space
XA54S5Lumbar discs or space
XA2Y58Intervertebral disc
XA8WM9Nucleus pulposus
XA10M1Annulus fibrosus

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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