1C1C.0

ICD-11 MMS 2026-01

Meningococcal meningitis

Description

A condition of the meninges, caused by an infection with the gram-negative bacteria Neisseria meningitidis. This condition is characterised by high fever, stiff neck, severe headache, vomiting, purpura, photophobia, and sometimes chills, altered mental status, or seizures. Transmission is through haematogenous spread to the meninges after droplet transmission or direct contact. Confirmation is by identification of Neisseria meningitidis in CSF (cerebrospinal fluid), for example, by agglutination test or polymerase chain reaction.

Index terms

  • Meningococcal meningitis
  • Meningitis due to Neisseria meningitidis
  • chronic meningococcal arachnoiditis
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  • diplococcal meningitis
  • diplococcal spinal meningitis
  • epidemic meningitis
  • meningococcal arachnoiditis
  • meningococcal cerebrospinal fever
  • meningococcal cerebrospinal infection
  • meningococcal cerebrospinal inflammation
  • meningococcal meningeal infection
  • meningococcal meninges infection
  • meningococcal spinal meningitis

Inclusions

  • Meningitis due to Neisseria meningitidis

Exclusions from above levels

  • NE83.1 – Infection arising from device, implant or graft, not elsewhere classified

Sibling codes

  • 1C1C.1 – Waterhouse-Friderichsen syndrome
  • 1C1C.2 – Meningococcaemia
  • 1C1C.Y – Other specified meningococcal disease
  • 1C1C.Z – Meningococcal disease, unspecified

Foundation entity

Meningococcal meningitis – http://id.who.int/icd/entity/516585689

Allowed postcoordination axes

Part of: 1C1C: Meningococcal disease › 01: Certain infectious or parasitic diseases