C64.9 — Malignant neoplasm of unspecified kidney, except renal pelvis
Is C64.9 billable?
Yes, but C64.9 is an unspecified code. C64.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, C64.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting C64.9 — the more specific alternatives are listed below.
C64.9 at a glance
| Code | C64.9 |
|---|---|
| Description | Malignant neoplasm of unspecified kidney, except renal pelvis |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does C64.9 group to?
C64.9 sits in MDC 11 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 656Kidney and Ureter Procedures for Neoplasm with MCCsurgical
- 657Kidney and Ureter Procedures for Neoplasm with CCsurgical
- 658Kidney and Ureter Procedures for Neoplasm without CC/MCCsurgical
As a secondary diagnosis, C64.9 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is C64.9 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under C64, the nearest indexed parent of C64.9. Use them to find the family, then select the specific code.
- Nephroblastoma (epithelial) (mesenchymal)
- Nephroma
- Wilms' tumor
- Adenocarcinoma › renal cell
- Carcinoma › renal cell (malignant)
- Tumor › Grawitz's
- Tumor › Wilms'
Excludes1 — never code together — inherited from C64
The conditions below can never be reported together with C64.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
How long has C64.9 existed?
C64.9 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.