C18 is the ICD-10 code for Malignant neoplasm of colon. It is a three-character category divided into 10 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block C15–C26 (Malignant neoplasms of digestive organs) in Chapter II, Neoplasms.
- Code type
- Category (3 characters)
- Chapter
- II · C00–D48
- Classification
- WHO ICD-10, 2019 version
Subcodes of C18
- C18.0Malignant neoplasm: Caecum
- C18.1Malignant neoplasm: Appendix
- C18.2Malignant neoplasm: Ascending colon
- C18.3Malignant neoplasm: Hepatic flexure
- C18.4Malignant neoplasm: Transverse colon
- C18.5Malignant neoplasm: Splenic flexure
- C18.6Malignant neoplasm: Descending colon
- C18.7Malignant neoplasm: Sigmoid colon
- C18.8Malignant neoplasm: Overlapping lesion of colon
- C18.9Malignant neoplasm: Colon, unspecified
C18 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
DC18Kræft i tyktarmen
C18Koolonin syöpä
C18Bösartige Neubildung des Kolons
C18Tumeur maligne du côlon
C18maligne neoplasma van colon
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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