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Chapters ENES DE

XExtension Codes
Substances
XM6S30Medicaments
XM5MU9Systemic antibiotics, anti-infectives or antiparasitics
Antiviral drugs
XM8GK2Protease inhibitors

XM56L1 category

Ritonavir

Also indexed as

Ritonavir

Nearby in Protease inhibitors

XM7YP4Saquinavir
XM1VT6Indinavir
XM6175Nelfinavir
XM6WJ3Amprenavir
XM2AR2Fosamprenavir
XM2U50Atazanavir
XM8QH1Tipranavir
XM63Q8Darunavir

PreviousXM1VT6 — Indinavir NextXM6175 — Nelfinavir

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
XM6CH2Drugs primarily affecting the autonomic nervous system
XM7YD4Drugs used in addictive disorders
XM8014Antivertigo and motion sickness preparations
XM1950Agents primarily acting on smooth and skeletal muscles or the respiratory system
XM5MU9Systemic antibiotics, anti-infectives or antiparasitics
XM0QJ8Neuroprotective agents, not elsewhere classified
XM7BA9Analgesics, antipyretics or anti-inflammatory drugs
XM7452Antiepileptics or antiparkinsonism drugs
XM0HK5Antipsychotics [neuroleptics]
14 more
Systemic antibiotics and antibacterials
Antimycobacterials
Antifungal agents
Antiviral drugs
Antivenin, antivenom (sera), Immunoglobulin
Vaccines
Other specified systemic anti-infectives and antiparasitics
Antiprotozoal drugs
Anthelminthics
XM56B8Nucleosides and nucleotides
XM7QR0Cyclic amines
XM90G3Phosphonic acid derivatives
XM8GK2Protease inhibitors
XM3EZ0Nucleoside and nucleotide reverse transcriptase inhibitors
XM5PT4Non-nucleoside reverse transcriptase inhibitors
XM6DT0Neuraminidase inhibitors
XM9DH8Antivirals for treatment of hepatitis C infections
XM3SJ3Antivirals for treatment of hepatitis C infections, combinations
30 more
XM7YP4Saquinavir
XM1VT6Indinavir
XM56L1Ritonavir
XM6175Nelfinavir
XM6WJ3Amprenavir
XM2AR2Fosamprenavir
XM2U50Atazanavir
XM8QH1Tipranavir
XM63Q8Darunavir

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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