1. Certain infectious and parasitic diseases (A00-B99)

 2. Neoplasms (C00-D48)

 3. Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89)

   D50-D53  Nutritional anaemias

   D55-D59  Haemolytic anaemias

   D60-D64  Aplastic and other anaemias

   D65-D69  Coagulation defects, purpura and other haemorrhagic conditions

   D70-D77  Other diseases of blood and blood-forming organs

   D80-D89  Certain disorders involving the immune mechanism

     D80  Immunodeficiency with predominantly antibody defects

     D81  Combined immunodeficiencies

     D82  Immunodeficiency associated with other major defects

     D84  Other immunodeficiencies

     D86  Sarcoidosis

     D89  Other disorders involving the immune mechanism, not elsewhere classified

 4. Endocrine, nutritional and metabolic diseases (E00-E90)

 5. Mental and behavioural disorders (F00-F99)

 6. Diseases of the nervous system (G00-G99)

 7. Diseases of the eye and adnexa (H00-H59)

 8. Diseases of the ear and mastoid process (H60-H95)

 9. Diseases of the circulatory system (I00-I99)

 10. Diseases of the respiratory system (J00-J99)

 11. Diseases of the digestive system (K00-K93)

 12. Diseases of the skin and subcutaneous tissue (L00-L99)

 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)

 14. Diseases of the genitourinary system (N00-N99)

 15. Pregnancy, childbirth and the puerperium (O00-O99)

 16. Certain conditions originating in the perinatal period (P00-P96)

 17. Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)

 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

 19. Injury, poisoning and certain other consequences of external causes (S00-T98)

 20. External causes of morbidity and mortality (V01-Y98)

 21. Factors influencing health status and contact with health services (Z00-Z99)

 22. Codes for special purposes (U00-U85)