Skip to content

Chapters ENES DE

XExtension Codes
Anatomy and topography
Functional anatomy
Musculoskeletal system
Bones
XA4S38Axial skeleton
XA4RY5Bones of the head
XA1RZ4Cranial Bones
XA2P19Temporal bone

XA68N3 category

Mastoid

Also indexed as

Mastoid

Nearby in Temporal bone

XA1E15Petrous bone

NextXA1E15 — Petrous bone

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
XA1RZ4Cranial Bones
XA3Y16Facial bones
XA6EQ1Bones of middle ear
XA2BH0Calvarium
XA0KU6Cranial fossa
XA2SR4Ethmoid bone
XA6ZM9Frontal bone
XA5JA2Occipital bone
XA2J87Parietal bone
XA63R0Sphenoid bone
XA2P19Temporal bone
XA8E69Orbital bone
1 more
XA68N3Mastoid
XA1E15Petrous bone

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