ICD-10 block

D37–D48 Neoplasms of uncertain or unknown behaviour

The block D37–D48 of ICD-10 is titled “Neoplasms of uncertain or unknown behaviour”. It is part of Chapter II, Neoplasms, and holds 12 groups.

Coding notes

Categories D37-D48 classify by site neoplasms of uncertain or unknown behaviour, i.e., there is doubt whether the neoplasm is malignant or benign. Such neoplasms are assigned behaviour code /1 in the classification of the morphology of neoplasms.

Codes in D37–D48

D37Neoplasm of uncertain or unknown behaviour of oral cavity and digestive organs

D38Neoplasm of uncertain or unknown behaviour of middle ear and respiratory and intrathoracic organs

D39Neoplasm of uncertain or unknown behaviour of female genital organs

D40Neoplasm of uncertain or unknown behaviour of male genital organs

D41Neoplasm of uncertain or unknown behaviour of urinary organs

D42Neoplasm of uncertain or unknown behaviour of meninges

D43Neoplasm of uncertain or unknown behaviour of brain and central nervous system

D44Neoplasm of uncertain or unknown behaviour of endocrine glands

D45Polycythaemia vera

D46Myelodysplastic syndromes

D47Other neoplasms of uncertain or unknown behaviour of lymphoid, haematopoietic and related tissue

D48Neoplasm of uncertain or unknown behaviour of other and unspecified sites

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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