C66.1: Malignant neoplasm of right ureter
C66.1 is the billable ICD-10-CM diagnosis code for Malignant neoplasm of right ureter. 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 C66.1?
C66.1 is the ICD-10-CM diagnosis code for Malignant neoplasm of right ureter. It belongs to category C66 (Malignant neoplasm of ureter).
Is C66.1 a billable code?
Yes. C66.1 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 C66.1 belong to?
C66.1 is part of ICD-10-CM category C66 — Malignant neoplasm of ureter, 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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