C91.4 is the ICD-10 code for Hairy-cell leukaemia. It is a four-character subcategory of C91 (Lymphoid leukaemia), the most specific level in the WHO edition. It belongs to the block C81–C96 (Malignant neoplasms, stated or presumed to be primary, of lymphoid, haematopoietic and related tissue) in Chapter II, Neoplasms.
- Code type
- Subcategory (4 characters)
- Chapter
- II · C00–D48
- Classification
- WHO ICD-10, 2019 version
What C91.4 includes
Conditions and terms that are coded here.
- Leukaemic reticuloendotheliosis
C91.4 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
C91.4Hårcellsleukemi
C91.4Hårcelleleukemi
DC914Hårcelle leukæmi
C91.4Karvasoluleukemia
C91.4Haarzellenleukämie
C91.4Leucémie à tricholeucocytes
C91.4hairy-cell leukaemia
Listed through more specific codes:
- C91.40Hairy cell leukemia not having achieved remission
- C91.41Hairy cell leukemia, in remission
- C91.42Hairy cell leukemia, in relapse
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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