C26.9: Malignant neoplasm of ill-defined sites within the digestive system
C26.9 is the billable ICD-10-CM diagnosis code for Malignant neoplasm of ill-defined sites within the digestive system. 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 C26.9?
C26.9 is the ICD-10-CM diagnosis code for Malignant neoplasm of ill-defined sites within the digestive system. It belongs to category C26 (Malignant neoplasm of other and ill-defined digestive organs).
Is C26.9 a billable code?
Yes. C26.9 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 C26.9 belong to?
C26.9 is part of ICD-10-CM category C26 — Malignant neoplasm of other and ill-defined digestive organs, which has 6 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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