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Chapters ENES DE

03Diseases of the blood or blood-forming organs
Anaemias or other erythrocyte disorders

3A80-3A8Z block

Polycythaemia

3 subordinate codes

3A80Congenital polycythaemia
3A81Acquired polycythaemia
4B4ZDiseases of the immune system, unspecified

Nearby in Anaemias or other erythrocyte disorders

3A00-3A0ZNutritional or metabolic anaemias
3A10-3A4ZHaemolytic anaemias
3A50Thalassaemias
3A51Sickle cell disorders or other haemoglobinopathies
3A60-3A6ZPure red cell aplasia
3A70Aplastic anaemia
3A71Anaemia due to chronic disease
3A72Sideroblastic anaemia

Previous3A73 — Congenital dyserythropoietic anaemia Next3A90 — Anaemia due to acute disease

Browse ICD-11

01Certain infectious or parasitic diseases
02Neoplasms
03Diseases of the blood or blood-forming organs
04Diseases of the immune system
05Endocrine, nutritional or metabolic diseases
06Mental, behavioural or neurodevelopmental disorders
07Sleep-wake disorders
08Diseases of the nervous system
09Diseases of the visual system
10Diseases of the ear or mastoid process
11Diseases of the circulatory system
12Diseases of the respiratory system
13Diseases of the digestive system
14Diseases of the skin
15Diseases of the musculoskeletal system or connective tissue
16Diseases of the genitourinary system
17Conditions related to sexual health
18Pregnancy, childbirth or the puerperium
19Certain conditions originating in the perinatal period
20Developmental anomalies
21Symptoms, signs or clinical findings, not elsewhere classified
22Injury, poisoning or certain other consequences of external causes
23External causes of morbidity or mortality
24Factors influencing health status or contact with health services
25Codes for special purposes
26Supplementary Chapter Traditional Medicine Conditions
VSupplementary section for functioning assessment
XExtension Codes
3A00-3A9ZAnaemias or other erythrocyte disorders
3B10-3B6ZCoagulation defects, purpura or other haemorrhagic or related conditions
3B80-3B8ZDiseases of spleen
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified
3A50Thalassaemias
3A51Sickle cell disorders or other haemoglobinopathies
3A60-3A6ZPure red cell aplasia
3A70Aplastic anaemia
3A71Anaemia due to chronic disease
3A72Sideroblastic anaemia
3A73Congenital dyserythropoietic anaemia
3A80-3A8ZPolycythaemia
3A90Anaemia due to acute disease
3A91Congenital methaemoglobinaemia
3A92Hereditary methaemoglobinaemia
3A93Acquired methaemoglobinaemia
3A94Acute posthaemorrhagic anaemia
4B4YOther specified diseases of the immune system
4B4ZDiseases of the immune system, unspecified
2 more
3A80Congenital polycythaemia
3A81Acquired polycythaemia
4B4ZDiseases of the immune system, unspecified

International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).

Release 2026-01. View this entity in the official WHO ICD-11 browser.

This page reproduces WHO classification content for reference. It is not medical advice and must not be used to diagnose or treat. For coding decisions, consult the official release and your national coding guidelines.

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