ICD-10 chapter
Chapter III Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
Chapter III of ICD-10 is titled “Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism”. It spans codes D50–D89, in 6 blocks.
What Chapter III excludes
Conditions that look similar but belong under another code.
- autoimmune disease (systemic) NOS M35.9
- certain conditions originating in the perinatal period P00-P96
- complications of pregnancy, childbirth and the puerperium O00-O99
- congenital malformations, deformations and chromosomal abnormalities Q00-Q99
- endocrine, nutritional and metabolic diseases E00-E90
- human immunodeficiency virus [HIV] disease B20-B24
- injury, poisoning and certain other consequences of external causes S00-T98
- neoplasms C00-D48
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified R00-R99
Blocks in Chapter III
- D50–D53Nutritional anaemias4 categories
- D55–D59Haemolytic anaemias5 categories
- D60–D64Aplastic and other anaemias5 categories
- D65–D69Coagulation defects, purpura and other haemorrhagic conditions5 categories
- D70–D77Other diseases of blood and blood-forming organs8 categories
- D80–D89Certain disorders involving the immune mechanism7 categories
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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