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XExtension Codes
Substances
Allergens
Low molecular weight haptens

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Contact allergens in industrial biocides, cutting oils or disinfectants

Nearby in Low molecular weight haptens

Contact allergens in clothing or footwear
Contact allergens in cosmetics
Contact allergens in fragrances
Contact allergens in dental materials
Contact allergens in food flavours or additives
Contact allergens in hairdressing products
Contact allergens in metals or metal salts
Contact allergens in plants or other organic matter

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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
Histopathology
Dimensions of injury
Dimensions of external causes
Consciousness
Substances
Diagnosis code descriptors
Capacity or context
Health Devices, Equipment and Supplies
Extension codes of particular relevance to skin diseases
5 more
XM6S30Medicaments
XM9N55Substances, chiefly nonmedicinal
Allergens
Low molecular weight haptens
Low molecular weight photohaptens
High molecular weight allergens
Contact allergens in clothing or footwear
Contact allergens in cosmetics
Contact allergens in fragrances
Contact allergens in dental materials
Contact allergens in food flavours or additives
Contact allergens in hairdressing products
Contact allergens in industrial biocides, cutting oils or disinfectants
Contact allergens in metals or metal salts
Contact allergens in plants or other organic matter
Contact allergens in plastics, glues or resin systems
Contact allergens in preservatives or biocides
Contact allergens in rubber chemicals
Contact allergens in systemic medicaments
Contact allergens in topical medicaments

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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