4B01

ICD-11 MMS 2026-01

Disorders of neutrophil function

Exclusions from above levels

  • 02 – Neoplasms
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 20 – Developmental anomalies

Child codes

  • 4B01.0 – Constitutional disorders of neutrophil function
  • 4B01.1 – Acquired disorders of neutrophil function
  • 4B01.Z – Disorders of neutrophil function, unspecified

Foundation children elsewhere

  • 4A00.0 – Functional neutrophil defects

Sibling codes

  • 4B00 – Disorders of neutrophil number
  • 4B02 – Eosinopenia
  • 4B03 – Eosinophilia
  • 4B04 – Disorders with decreased monocyte counts
  • 4B05 – Disorders with increased monocyte counts
  • 4B06 – Acquired lymphopenia
  • 4B07 – Acquired lymphocytosis
  • 4B0Y – Other specified immune system disorders involving white cell lineages
  • 4B0Z – Immune system disorders involving white cell lineages, unspecified

Foundation entity

Disorders of neutrophil function – http://id.who.int/icd/entity/576188835

Part of: 04: Diseases of the immune system