4B20.3

ICD-11 MMS 2026-01

Neurosarcoidosis

Description

This refers to sarcoidosis, a condition of unknown cause featuring granulomas in various tissues, involving the central nervous system (brain and spinal cord). It can have many manifestations, but abnormalities of the cranial nerves (a group of twelve nerves supplying the head and neck area) are the most common.

Index terms

  • Neurosarcoidosis
  • Multiple cranial nerve palsies in sarcoidosis
  • Polyneuropathy in sarcoidosis

Exclusions from above levels

  • 2A83.0 – Monoclonal gammopathy of undetermined significance
  • NE84 – Failure or rejection of transplanted organs or tissues
  • 02 – Neoplasms
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  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 20 – Developmental anomalies

Sibling codes

  • 4B20.0 – Sarcoidosis of lung
  • 4B20.1 – Sarcoidosis of lymph nodes
  • 4B20.2 – Sarcoidosis of the digestive system
  • 4B20.4 – Ocular sarcoidosis
  • 4B20.5 – Cutaneous sarcoidosis
  • 4B20.Y – Other specified sarcoidosis
  • 4B20.Z – Sarcoidosis, unspecified

Foundation entity

Neurosarcoidosis – http://id.who.int/icd/entity/1479285656

Allowed postcoordination axes

Part of: 4B20: Sarcoidosis › 04: Diseases of the immune system