C65.9 Malignant neoplasm of unspecified renal pelvis

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from C65 Malignant neoplasm of renal pelvis

Includes

• malignant neoplasm of pelviureteric junction
• malignant neoplasm of renal calyces

Risk adjustment (HCC)

• CMS-HCC V28: HCC 22 — Bladder, Colorectal, and Other Cancers
• CMS-HCC V22: HCC 11 — Colorectal, Bladder, and Other Cancers
• RxHCC V08: HCC 20 — Lung, Kidney, and Other Cancers; Secondary Cancer of Lymph Nodes and Other Sites
• ESRD V24: HCC 11

MS-DRG index

Defines the logic of DRG(s) 656-658 in MDC 11.

Approximate ICD-9-CM (GEMs)

• 189.1 Malignant neoplasm of renal pelvis (approximate)

Code annotations containing back-references to C65.9

Back-references to C65

• Type 1 Excludes: C64 Malignant neoplasm of kidney, except renal pelvis ("malignant neoplasm of renal calyces (C65.-)")
• Type 1 Excludes: C64 Malignant neoplasm of kidney, except renal pelvis ("malignant neoplasm of renal pelvis (C65.-)")

Nearby codes

• C65 Malignant neoplasm of renal pelvis
• C65.1 Malignant neoplasm of right renal pelvis
• C65.2 Malignant neoplasm of left renal pelvis
• C65.9 Malignant neoplasm of unspecified renal pelvis (this code)