C66.9Billable
Malignant neoplasm of unspecified ureter
- Chapter
- 2. Neoplasms
- Category
- C66
- Effective date
- October 1, 2026
Related codes in category C66
Frequently asked questions
What is ICD-10 code C66.9?
C66.9 is an ICD-10-CM diagnosis code for Malignant neoplasm of unspecified ureter.
Is C66.9 a billable code?
Yes. C66.9 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is C66.9 in?
C66.9 falls under Chapter 2: Neoplasms.
When did C66.9 become effective?
C66.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to C66.9?
C66.9 belongs to category C66, which includes 3 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.