C21.1 is the ICD-10 code for Malignant neoplasm: Anal canal. It is a four-character subcategory of C21 (Malignant neoplasm of anus and anal canal), 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 C21.1 includes
Conditions and terms that are coded here.
- Anal sphincter
C21.1 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
C21.1Ondartet svulst i analkanal
DC211Kræft i analkanalen
C21.1Analkanal
C21.1Canal anal
C21.1anaal kanaal
C21.1Malignant neoplasm of anal canal
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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