9C40.1

ICD-11 MMS 2026-01

Optic neuritis

Description

Optic neuritis is a condition related to immune mediated inflammation of the optic nerve. It is commoner in women and can be the first presenting symptom of MS. The symptoms are those of blurred vision, pain on moving the eye and in the vast majority it is self limiting.

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
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  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes
  • 8A21.0 – Posterior cortical atrophy

Child codes

  • 9C40.10 – Retrobulbar neuritis
  • 9C40.1Y – Other specified optic neuritis
  • 9C40.1Z – Optic neuritis, unspecified

Foundation children elsewhere

  • 8A43 – Neuromyelitis optica

Sibling codes

  • 9C40.0 – Infectious optic neuropathy
  • 9C40.2 – Neuroretinitis
  • 9C40.3 – Perineuritis of optic nerve
  • 9C40.4 – Ischaemic optic neuropathy
  • 9C40.5 – Compressive optic neuropathy
  • 9C40.6 – Infiltrative optic neuropathy
  • 9C40.7 – Traumatic optic neuropathy
  • 9C40.8 – Hereditary optic neuropathy
  • 9C40.9 – Glaucomatous optic neuropathy
  • 9C40.A – Optic disc swelling
  • 9C40.B – Optic atrophy
  • 9C40.Y – Other specified disorder of the optic nerve
  • 9C40.Z – Disorder of the optic nerve, unspecified

Foundation entity

Optic neuritis – http://id.who.int/icd/entity/210935787

Allowed postcoordination axes

Part of: 9C40: Disorder of the optic nerve › 09: Diseases of the visual system