4A01.0

ICD-11 MMS 2026-01

Immunodeficiencies with predominantly antibody defects

Description

A disorder characterised by an inability to mount a normal immune response due to antibody (i.e. immunoglobulin) defects

Exclusions from above levels

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

Child codes

  • 4A01.00 – Hereditary agammaglobulinaemia with profoundly reduced or absent B cells
  • 4A01.01 – Immunodeficiencies with severe reduction in at least two serum immunoglobulin isotypes with normal or low numbers of B cells
  • 4A01.02 – Specific antibody deficiency with normal immunoglobulin concentrations or normal number of B cells
  • 4A01.03 – Transient hypogammaglobulinaemia of infancy
  • 4A01.04 – Immunodeficiencies with isotype or light chain deficiencies with normal number of B cells
  • 4A01.05 – Immunodeficiencies with severe reduction in serum IgG or IgA with normal or elevated IgM and normal numbers of B-cells
  • 4A01.0Y – Other specified immunodeficiencies with predominantly antibody defects
  • 4A01.0Z – Immunodeficiencies with predominantly antibody defects, unspecified

Sibling codes

  • 4A01.1 – Combined immunodeficiencies
  • 4A01.2 – Diseases of immune dysregulation
  • 4A01.3 – Other well-defined immunodeficiency syndromes due to defects in adaptive immunity
  • 4A01.Z – Primary immunodeficiencies due to disorders of adaptive immunity, unspecified

Foundation entity

Immunodeficiencies with predominantly antibody defects – http://id.who.int/icd/entity/85074116

Part of: 4A01: Primary immunodeficiencies due to disorders of adaptive immunity › 04: Diseases of the immune system