ICD-10-CM > C00-D49 > C64-C68 > C66 C66 Malignant neoplasm of ureter Non-Billable/Non-Specific Type 1 Excludes malignant neoplasm of ureteric orifice of bladder (C67.6) Codes C66.1Malignant neoplasm of right ureterC66.2Malignant neoplasm of left ureterC66.9Malignant neoplasm of unspecified ureter