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Chapters ENES DE

XExtension Codes
Substances
XM6S30Medicaments
XM26S4Hormones and their synthetic substitutes or antagonists, not elsewhere classified
Antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified
XM9X91Aromatase inhibitors

XM2J37 category

Letrozole

Also indexed as

Letrozole

Nearby in Aromatase inhibitors

XM7D25Aminoglutethimide
XM14P8Formestane
XM4Z64Anastrozole
XM6976Vorozole
XM2VT0Exemestane

PreviousXM4Z64 — Anastrozole NextXM6976 — Vorozole

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
XM3MU3Agents primarily affecting the gastrointestinal system
XM6WT8Agents primarily affecting blood constituents or immune system
XM3KY1Agents affecting genitourinary system, sex or anabolic hormones
XM26S4Hormones and their synthetic substitutes or antagonists, not elsewhere classified
XM9W63Agents affecting bones, joints or other connective tissue, not elsewhere classified
XM4TG8Agents primarily affecting water and nutrition-balance or metabolism
XM3973Agents primarily affecting the cardiovascular system
XM6CH2Drugs primarily affecting the autonomic nervous system
XM7YD4Drugs used in addictive disorders
14 more
Hypothalamic hormones and analogues
Prolactin inhibitors
Glucocorticoids and synthetic analogues
Anticorticosteroids
Antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified
Thyroid hormones and substitutes
Antithyroid drugs
Iodine therapy
XM9N95Glucagon
6 more
XM6W81Gonadotrophin-releasing hormone antagonists
XM10A6Antiestrogen
XM7JF4Antiandrogen
XM9X91Aromatase inhibitors
XM8MB2Antigonadotrophin
XM3C58Cyproterone
XM0FW7Danazol
XM9QT3Nafoxidine
XM0P47Taleranol
5 more
XM7D25Aminoglutethimide
XM14P8Formestane
XM4Z64Anastrozole
XM2J37Letrozole
XM6976Vorozole
XM2VT0Exemestane

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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