C21.2: Malignant neoplasm of cloacogenic zone
C21.2 is the billable ICD-10-CM diagnosis code for Malignant neoplasm of cloacogenic zone. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code C21.2?
C21.2 is the ICD-10-CM diagnosis code for Malignant neoplasm of cloacogenic zone. It belongs to category C21 (Malignant neoplasm of anus and anal canal).
Is C21.2 a billable code?
Yes. C21.2 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does C21.2 belong to?
C21.2 is part of ICD-10-CM category C21 — Malignant neoplasm of anus and anal canal, which has 8 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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