ICD-10 diagnosis code

C21 Malignant neoplasm of anus and anal canal

C21 is the ICD-10 code for Malignant neoplasm of anus and anal canal. It is a three-character category divided into 4 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 C21

C21 in national editions

Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.

SwedenICD-10-SE

C21Malign tumör i anus och analkanalen

DenmarkICD-10-DK

DC21Kræft i endetarmsåbningen og analkanalen

FinlandICD-10-FI

C21Peräaukon ja/tai peräaukkokanavan syöpä

GermanyICD-10-GM

C21Bösartige Neubildung des Anus und des Analkanals

FranceICD-10-FR

C21Tumeur maligne de l'anus et du canal anal

NetherlandsICD-10-NL

C21maligne neoplasma van anus en anaal kanaal

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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