Is C66 a billable code?
No. C66 is a header code that groups 3 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
C66: Malignant neoplasm of ureter
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
C66 groups related diagnoses under malignant neoplasm of ureter. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
C66 questions
What does C66 mean?
C66 is the ICD-10-CM code for Malignant neoplasm of ureter. It is in chapter 2, Neoplasms (C00-D49).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.