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Chapters ENES DE

XExtension Codes
Substances
XM6S30Medicaments
XM9NV2Opioids
Opioids or related analgesics and agents affecting opioid receptors
Opioid receptor antagonists

XM2M16 category

Naltrexone

Also indexed as

Naltrexone

Nearby in Opioid receptor antagonists

XM7TT0Antagonist narcotic analgesic
XM0850Cyclazocine
XM65J2Levallorphan
XM4HP3Morphine antagonist
XM14T9Naloxone
XM9BM4Narcotic antagonist
XM5DJ2Opiate antagonists
XM3TK0Methylnaltrexone bromide

PreviousXM14T9 — Naloxone NextXM9BM4 — Narcotic antagonist

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
XM7452Antiepileptics or antiparkinsonism drugs
XM0HK5Antipsychotics [neuroleptics]
XM4G94Antidepressants
XM98Y0Cannabinoids or hallucinogens
XM9NV2Opioids
XM0RE9Psychostimulants
XM3L75Sedative hypnotic drugs or other central nervous system depressants
XM16M6Other or unspecified drugs, medicaments and biological substances
XM0YW5Topical agents primarily affecting skin and mucous membrane and ophthalmological, otorhinolaryngological or dental drugs
14 more
Opioids or related analgesics and agents affecting opioid receptors
XM4SL9Oxycodone
XM9UH3Nalfurafine
XM4587Codeine, codeine derivatives and other opioids used in cough suppression
XM1ZY9Methadone, methadone derivatives and other drugs used to treat opioid addictive disorders
XM4MV8Opioid anaesthetics
Opioid receptor antagonists
XM4S22Other opioid analgesics, natural, synthetic and semi-synthetic
XM4PD9Nalmefene
XM4M74Difelikefalin
3 more
XM7TT0Antagonist narcotic analgesic
XM0850Cyclazocine
XM65J2Levallorphan
XM4HP3Morphine antagonist
XM14T9Naloxone
XM2M16Naltrexone
XM9BM4Narcotic antagonist
XM5DJ2Opiate antagonists
XM3TK0Methylnaltrexone bromide
XM4GP3Alvimopan
XM93Z3Naloxegol
XM6KY8Opioid antagonist

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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