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Chapters ENES DE

09Diseases of the visual system
Disorders of the visual pathways or centres

9C40 category

Disorder of the optic nerve

14 subordinate codes

9C40.0Infectious optic neuropathy
9C40.1Optic neuritis
9C40.2Neuroretinitis
9C40.3Perineuritis of optic nerve
9C40.4Ischaemic optic neuropathy
9C40.5Compressive optic neuropathy
9C40.6Infiltrative optic neuropathy
9C40.7Traumatic optic neuropathy
9C40.8Hereditary optic neuropathy
9C40.9Glaucomatous optic neuropathy
9C40.AOptic disc swelling
9C40.BOptic atrophy
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified

Nearby in Disorders of the visual pathways or centres

9C41Disorder of optic chiasm
9C42Disorder of post chiasmal visual pathways
9C43Disorder of visual cortex
9C44Disorder of higher visual centres
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified

Next9C41 — Disorder of optic chiasm

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
9A00-9A4ZDisorders of the ocular adnexa or orbit
9A60-9B3ZDisorders of the eyeball - anterior segment
9B50-9C0ZDisorders of the eyeball - posterior segment
9C20-9C2ZDisorders of the eyeball affecting both anterior and posterior segments
9C40-9C4ZDisorders of the visual pathways or centres
9C60-9C61.ZGlaucoma or glaucoma suspect
9C80-9C8ZStrabismus or ocular motility disorders
9D00-9D0ZDisorders of refraction or accommodation
9D20-9D25Postprocedural disorders of eye or ocular adnexa
6 more
9C40Disorder of the optic nerve
9C41Disorder of optic chiasm
9C42Disorder of post chiasmal visual pathways
9C43Disorder of visual cortex
9C44Disorder of higher visual centres
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified
9C40.0Infectious optic neuropathy
9C40.1Optic neuritis
9C40.2Neuroretinitis
9C40.3Perineuritis of optic nerve
9C40.4Ischaemic optic neuropathy
9C40.5Compressive optic neuropathy
9C40.6Infiltrative optic neuropathy
9C40.7Traumatic optic neuropathy
9C40.8Hereditary optic neuropathy
9C40.9Glaucomatous optic neuropathy
9C40.AOptic disc swelling
9C40.BOptic atrophy
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified

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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