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Chapters ENES DE

XExtension Codes
Substances
XM9N55Substances, chiefly nonmedicinal
XM5R77Substance of plant origin

XM26G6 category

Usnic acid

Also indexed as

Usnic acid

Nearby in Substance of plant origin

XM98Y1Abrus precatorius plant
XM99Y1Aconitum plant
XM7BA0Actaea plant
XM55K4Aethusa cynapium plant
XM3AF3Anamirta cocculus plant
XM8SE2Antiaris toxicaria plant
XM2X16Arum maculatum plant
XM1EY0Atropa belladonna plant

PreviousXM6635 — Evernic acid NextXM3XH8 — Grains and flours

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
XM7U05Paratertiary butylphenol formaldehyde resin
XM5B21Phthalate
XM74S8Poisonous mushroom
XM9KE6Silicone
XM5R77Substance of plant origin
XM6UT9Substance of human origin
XM7FG4Toluidine
XM5NA2Triorthocresyl phosphate
XM90U0Triphenyl phosphate
41 more
XM9CZ8Evernia prunastri extract
XM5AM5Isoeugenol
XM88U7Abietic acid
XM9L39Turpentine oil
XM3B42Atranorin
XM4BW2Blighia sapida plant
XM6635Evernic acid
XM26G6Usnic acid
XM3XH8Grains and flours
XM21W4Plant or herbal extracted compounds
XM8MB5Rubber
XM0XN7Cotton plant
XM1KF1Sisal
XM2BX6Brucea javanica plant
XM9B82Caladium plant
102 more

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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