2026 ICD-10-CM Diagnosis Code C79.01Secondary malignant neoplasm of right kidney and renal pelvis

ICD-10-CM Codes›C00–D49›C76-C80›C79

ICD-10-CM C79.01
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C79.01 is a billable ICD-10-CM diagnosis code for secondary malignant neoplasm of right kidney and renal pelvis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 656 through 658, 686 through 688. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Secondary malignancies.

Code Identity

ICD-10-CM Code
C79.01
Billable Status
Yes — Valid for Submission
Code Describes
Secondary malignant neoplasm of right kidney and renal pelvis
Short Description
Secondary malignant neoplasm of r kidney and renal pelvis
Parent Code
C79.0
Secondary malignant neoplasm of kidney and renal pelvis

Code Classification

ChapterC00–D49Neoplasms
SectionC76-C80Malignant neoplasms of ill-defined, other secondary and unspecified sites
CategoryC79Secondary malignant neoplasm of other and unspecified sites
This CodeC79.01Secondary malignant neoplasm of right kidney and renal pelvis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral metastatic malignant melanoma to kidneys
  • Bilateral metastatic malignant neoplasm to kidneys
  • Bilateral neoplasm of kidneys
  • Carcinoma of renal pelvis
  • Malignant melanoma metastatic to kidney
  • Metastatic adenocarcinoma to bilateral kidneys
  • Metastatic adenocarcinoma to left kidney
  • Metastatic adenocarcinoma to right kidney
  • Metastatic malignant melanoma to left kidney
  • Metastatic malignant melanoma to right kidney
  • Metastatic malignant neoplasm to left kidney
  • Metastatic malignant neoplasm to renal pelvis
  • Metastatic malignant neoplasm to right kidney
  • Metastatic squamous cell carcinoma to right kidney
  • Metastatic transitional cell carcinoma to kidney
  • Metastatic transitional cell carcinoma to renal pelvis
  • Metastatic transitional cell carcinoma to right kidney
  • Metastatic transitional cell carcinoma to right renal pelvis
  • Metastatic transitional cell carcinoma to upper urinary tract
  • Secondary adenocarcinoma of kidney
  • Transitional cell carcinoma of right kidney
  • Transitional cell carcinoma of right renal pelvis

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO070
Secondary malignancies
Default principal diagnosis: inpatient Yes · outpatient Yes

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
calyx, renalC65.C79.0D09.19D30.1D41.1D49.51
junction › pelviuretericC65.C79.0D09.19D30.1D41.1D49.59
kidney (parenchymal)C64.C79.0D09.19D30.0D41.0D49.51
kidney (parenchymal) › calyxC65.C79.0D09.19D30.1D41.1D49.51
kidney (parenchymal) › hilusC65.C79.0D09.19D30.1D41.1D49.51
kidney (parenchymal) › pelvisC65.C79.0D09.19D30.1D41.1D49.51
parenchyma, kidneyC64.C79.0D09.19D30.0D41.0D49.51
pelvis, pelvic › renalC65.C79.0D09.19D30.1D41.1D49.51
renalC64.C79.0D09.19D30.0D41.0D49.51
renal › calyxC65.C79.0D09.19D30.1D41.1D49.51
renal › hilusC65.C79.0D09.19D30.1D41.1D49.51
renal › parenchymaC64.C79.0D09.19D30.0D41.0D49.51
renal › pelvisC65.C79.0D09.19D30.1D41.1D49.51

Patient EducationClinical

Kidney Cancer

You have two kidneys. They are fist-sized organs on either side of your backbone above your waist. The tubes inside filter and clean your blood, taking out waste products and making urine. Kidney cancer forms in the lining of tiny tubes inside your kidneys.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert C79.01 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
198.0 Second malig neo kidney
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About C79.01Overview

Is C79.01 (Secondary malignant neoplasm of kidney and renal pelvis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report secondary malignant neoplasm of right kidney and renal pelvis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does C79.01 group to?

When secondary malignant neoplasm of right kidney and renal pelvis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 656, 657, 658, 686, 687, 688, with relative weights from 0.7903 to 3.1838 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of C79.01?

Under the General Equivalence Mappings, secondary malignant neoplasm of right kidney and renal pelvis converts to ICD-9-CM 198.0 (second malig neo kidney). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.