C66.1
Billable codeMalignant neoplasm of right ureter
The ICD-10 code for malignant neoplasm of right ureter is C66.1.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- C66.2Malignant neoplasm of left ureter
- C66.9Malignant neoplasm of unspecified ureter
- C66.1Malignant neoplasm of right ureter
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 1892Approximate match
Associated MS-DRGs
C66.1 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.
- DRG 643Endocrine Disorders with MCC
- DRG 644Endocrine Disorders with CC
- DRG 645Endocrine Disorders without CC/MCC
- DRG 656Kidney and Ureter Procedures for Neoplasm with MCC
- DRG 657Kidney and Ureter Procedures for Neoplasm with CC
- DRG 658Kidney and Ureter Procedures for Neoplasm without CC/MCC
- DRG 659Kidney and Ureter Procedures for Non-Neoplasm with MCC
- DRG 660Kidney and Ureter Procedures for Non-Neoplasm with CC
- DRG 661Kidney and Ureter Procedures for Non-Neoplasm without CC/MCC
- DRG 686Kidney and Urinary Tract Neoplasms with MCC
- DRG 687Kidney and Urinary Tract Neoplasms with CC
- DRG 688Kidney and Urinary Tract Neoplasms without CC/MCC