01 Certain infectious or parasitic diseases

 02 Neoplasms

 03 Diseases of the blood or blood-forming organs

   Anaemias or other erythrocyte disorders

     Nutritional or metabolic anaemias

     Haemolytic anaemias

     3A50  Thalassaemias

     3A51  Sickle cell disorders or other haemoglobinopathies

     Pure red cell aplasia

     3A70  Aplastic anaemia

     3A71  Anaemia due to chronic disease

     3A72  Sideroblastic anaemia

     3A73  Congenital dyserythropoietic anaemia

     Polycythaemia

     3A90  Anaemia of acute disease

     3A91  Congenital methaemoglobinaemia

     3A92  Hereditary methaemoglobinaemia

     3A93  Acquired methaemoglobinaemia

     3A9Y  Other specified anaemias and erythrocyte disorders

     3A9Z  Anaemias or other erythrocyte disorders, unspecified

   Coagulation defects, purpura or other haemorrhagic or related conditions

   Diseases of spleen

   3C0Y  Other specified diseases of the blood or blood-forming organs

   3C0Z  Diseases of the blood or blood-forming organs, unspecified

 04 Diseases of the immune system

 05 Endocrine, nutritional or metabolic diseases

 06 Mental, behavioural or neurodevelopmental disorders

 07 Sleep-wake disorders

 08 Diseases of the nervous system

 09 Diseases of the visual system

 10 Diseases of the ear or mastoid process

 11 Diseases of the circulatory system

 12 Diseases of the respiratory system

 13 Diseases of the digestive system

 14 Diseases of the skin

 15 Diseases of the musculoskeletal system or connective tissue

 16 Diseases of the genitourinary system

 17 Conditions related to sexual health

 18 Pregnancy, childbirth or the puerperium

 19 Certain conditions originating in the perinatal period

 20 Developmental anomalies

 21 Symptoms, signs or clinical findings, not elsewhere classified

 22 Injury, poisoning or certain other consequences of external causes