C18.9 is the ICD-10 code for Malignant neoplasm: Colon, unspecified. It is a four-character subcategory of C18 (Malignant neoplasm of colon), the most specific level in the WHO edition. It belongs to the block C15–C26 (Malignant neoplasms of digestive organs) in Chapter II, Neoplasms.
- Code type
- Subcategory (4 characters)
- Chapter
- II · C00–D48
- Classification
- WHO ICD-10, 2019 version
What C18.9 includes
Conditions and terms that are coded here.
- Large intestine NOS
C18.9 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
C18.9Ondartet svulst i uspesifisert del av tykktarm
DC189Kræft i tyktarmen UNS
C18.9Määrittämätön koolonin syöpä
C18.9Kolon, nicht näher bezeichnet
C18.9Côlon, sans précision
C18.9colon, niet-gespecificeerd
C18.9Malignant neoplasm of colon, unspecified
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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