C18.6: Malignant neoplasm of descending colon
C18.6 is the billable ICD-10-CM diagnosis code for Malignant neoplasm of descending colon. 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 C18.6?
C18.6 is the ICD-10-CM diagnosis code for Malignant neoplasm of descending colon. It belongs to category C18 (Malignant neoplasm of colon).
Is C18.6 a billable code?
Yes. C18.6 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 C18.6 belong to?
C18.6 is part of ICD-10-CM category C18 — Malignant neoplasm of colon, which has 20 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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