ICD-10-CM · Chapter 2 · C00-D49
C66 Malignant neoplasm of ureter
3 subcodes
Block: Malignant neoplasms of urinary tract (C64-C68)
Excludes 1 (cannot be coded together)
- malignant neoplasm of ureteric orifice of bladder (C67.6)
Subcodes
Each subcode links to a detail page with full clinical annotations.
| Code | Description | Billable |
| C66..1 | Malignant neoplasm of right ureter | Yes |
| C66..2 | Malignant neoplasm of left ureter | Yes |
| C66..9 | Malignant neoplasm of unspecified ureter | Yes |
Last reviewed: September 2026