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ICD-11 Codes Starting with 4

4A00

Primary immunodeficiencies due to disorders of innate immunity

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4A00.0

Functional neutrophil defects

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4A00.00

Neutrophil immunodeficiency syndrome

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4A00.0Y

Other specified functional neutrophil defects

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4A00.0Z

Functional neutrophil defects, unspecified

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4A00.1

Defects in the complement system

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4A00.10

Immunodeficiency with an early component of complement deficiency

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4A00.11

Immunodeficiency with a late component of complement deficiency

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4A00.12

Immunodeficiency with factor B deficiency

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4A00.13

Immunodeficiency with factor D anomaly

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4A00.14

Hereditary angioedema

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4A00.15

Acquired angioedema

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4A00.1Y

Other specified defects in the complement system

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4A00.1Z

Defects in the complement system, unspecified

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4A00.2

Genetic susceptibility to particular pathogens

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4A00.3

Immunodeficiency with natural-killer cell deficiency

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4A00.Y

Other specified primary immunodeficiencies due to disorders of innate immunity

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4A00.Z

Primary immunodeficiencies due to disorders of innate immunity, unspecified

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4A01

Primary immunodeficiencies due to disorders of adaptive immunity

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4A01.0

Immunodeficiencies with predominantly antibody defects

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4A01.00

Hereditary agammaglobulinaemia with profoundly reduced or absent B cells

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4A01.01

Immunodeficiencies with severe reduction in at least two serum immunoglobulin isotypes with normal or low numbers of B cells

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4A01.02

Specific antibody deficiency with normal immunoglobulin concentrations or normal number of B cells

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4A01.03

Transient hypogammaglobulinaemia of infancy

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4A01.04

Immunodeficiencies with isotype or light chain deficiencies with normal number of B cells

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4A01.05

Immunodeficiencies with severe reduction in serum IgG or IgA with normal or elevated IgM and normal numbers of B-cells

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4A01.0Y

Other specified immunodeficiencies with predominantly antibody defects

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4A01.0Z

Immunodeficiencies with predominantly antibody defects, unspecified

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4A01.1

Combined immunodeficiencies

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4A01.10

Severe combined immunodeficiencies

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4A01.11

Major histocompatibility complex class I deficiency

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4A01.12

Major histocompatibility complex class II deficiency

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4A01.1Y

Other specified combined immunodeficiencies

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4A01.1Z

Combined immunodeficiencies, unspecified

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