2026 ICD-10-CM Diagnosis Code N13.739Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified

ICD-10-CM Codes›N00–N99›N10-N16›N13

ICD-10-CM N13.739
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N13.739 is a billable ICD-10-CM diagnosis code for vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 698 through 700. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Vesicoureteral reflux.

Code Identity

ICD-10-CM Code
N13.739
Billable Status
Yes — Valid for Submission
Code Describes
Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified
Short Description
Vesicoureter-reflux w reflux nephropathy w hydroureter, unsp
Parent Code
N13.73
Vesicoureteral-reflux with reflux nephropathy with hydroureter

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN10-N16Renal tubulo-interstitial diseases
CategoryN13Obstructive and reflux uropathy
This CodeN13.739Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Reflux
      • vesicoureteral (with scarring)
        • with
          • nephropathy
            • with hydroureter

Clinical ClassificationClinical

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

CCSR GEN011
Vesicoureteral reflux
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Kidney Diseases

You have two kidneys, each about the size of your fist. They are near the middle of your back, just below the rib cage. Inside each kidney there are about a million tiny structures called nephrons. They filter your blood. They remove wastes and extra water, which become urine. The urine flows through tubes called ureters.

Read the full article at MedlinePlus

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

Convert N13.739 to ICD-9-CMHistory

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

ICD-9-CM
593.73 Vscourtl rflx w npht NOS
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 N13.739Overview

Is N13.739 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does N13.739 group to?

When vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 698, 699, 700, with relative weights from 0.6899 to 1.6544 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of N13.739?

Under the General Equivalence Mappings, vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified converts to ICD-9-CM 593.73 (vscourtl rflx w npht NOS). 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.