Other specified optic neuritis
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In short
Optic neuritis is an inflammation of the optic nerve, which is a bundle of more than 1 million nerve fibers that carry visual messages from the back of each eye to the brain. Causes of this inflammation include infections and immune-related illnesses such as multiple sclerosis, though sometimes the cause is unknown. With some optic nerve disorders, vision may return, whereas with others, there is no treatment, or treatment may only prevent further vision loss.
Source: MedlinePlus, National Library of Medicine.
AI-generated summary of the sources cited on this page, checked automatically against them. Not reviewed by a clinician; not medical advice.
Codes
Description
The optic nerve is a bundle of more than 1 million nerve fibers that carry visual messages. You have one connecting the back of each eye (your retina) to your brain. Damage to an optic nerve can cause vision loss. The type of vision loss and how severe it is depends on where the damage occurs. It may affect one or both eyes.
There are many different types of optic nerve disorders, including:
- Glaucoma is a group of diseases that are the leading cause of blindness in the United States. Glaucoma usually happens when the fluid pressure inside the eyes slowly rises and damages the optic nerve.
- Optic neuritis is an inflammation of the optic nerve. Causes include infections and immune-related illnesses such as multiple sclerosis. Sometimes the cause is unknown.
- Optic nerve atrophy is damage to the optic nerve. Causes include poor blood flow to the eye, disease, trauma, or exposure to toxic substances.
- Optic nerve head drusen are pockets of protein and calcium salts that build up in the optic nerve over time
Contact your health care provider if you are having vision problems. Tests for optic nerve disorders may include eye exams, ophthalmoscopy (an examination of the back of your eye), and imaging tests. Treatment depends on which disorder that you have. With some optic nerve disorders, you may get your vision back. With others, there is no treatment, or treatment may only prevent further vision loss.
Next to it in ICD-10
- H33Retinal detachment and tears
- H40Glaucoma or glaucoma suspect, unspecified
- H42Glaucoma in other diseases
- H47Other optic nerve and visual pathway disorders
- H52Refractive errors (short sight, long sight, astigmatism)
- H54Visual impairment and blindness
Neighbouring codes in the classification, not a medical link.
External resources
Questions
What is the ICD-10 code for Other specified optic neuritis?
H46 (WHO, International Classification of Diseases, 10th Revision).
What is the ICD-11 code for Other specified optic neuritis?
9C40.1Y: Other specified optic neuritis (WHO, ICD-11 for Mortality and Morbidity Statistics).
Sources and attribution
- ICD-11 for Mortality and Morbidity Statistics, © World Health Organization, licensed under CC BY-ND 3.0 IGO.
- Names other than the official source titles: Anpheros translations and plain-language names, made with AI assistance and checked automatically; the source names are in English.
- Source: MedlinePlus, National Library of Medicine.
- ICD-10 codes and titles © World Health Organization. Source: WHO, International Classification of Diseases, 10th Revision (2019).
Anpheros Search catalog 2026.10.5, published 17 October 2026. About the data →
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