2027 ICD-10-CM Diagnosis Code N13.71Vesicoureteral-reflux without reflux nephropathy

ICD-10-CM Codes›N00–N99›N10-N16›N13

ICD-10-CM N13.71
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

N13.71 is a billable ICD-10-CM diagnosis code for vesicoureteral-reflux without reflux nephropathy. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 698 through 700. Coders also document this condition as secondary left vesicoureteral reflux grade 1. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Vesicoureteral reflux.

Code Identity

ICD-10-CM Code
N13.71
Billable Status
Yes — Valid for Submission
Code Describes
Vesicoureteral-reflux without reflux nephropathy
Short Description
Vesicoureteral-reflux without reflux nephropathy
Same as the full description in the CMS dataset.
Parent Code
N13.7
Vesicoureteral-reflux

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN10-N16Renal tubulo-interstitial diseases
CategoryN13Obstructive and reflux uropathy
This CodeN13.71Vesicoureteral-reflux without reflux nephropathy

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Secondary left vesicoureteral reflux grade 1
  • Secondary left vesicoureteral reflux grade 1 measured by radionuclide cystogram
  • Secondary right vesicoureteral reflux grade 1
  • Secondary right vesicoureteral reflux grade 1 measured by voiding cystourethrography
  • Secondary right vesicoureteral reflux grade 3
  • Secondary right vesicoureteral reflux grade 3 measured by radionuclide cystogram
  • Vesicoureteral reflux without reflux nephropathy

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N13.71: its own notes plus those printed at N13.7, N13, block N10-N16, and Chapter 14. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block N10-N16 Renal tubulo-interstitial diseases applies to 35 codes
  • pyelonephritis

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From N13.7 Vesicoureteral-reflux applies to 8 codes
  • reflux-associated pyelonephritis (N11.0)
From Block N10-N16 Renal tubulo-interstitial diseases applies to 35 codes
  • pyeloureteritis cystica (N28.85)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From N13 Obstructive and reflux uropathy applies to 18 codes
  • calculus of kidney and ureter without hydronephrosis (N20.-)
  • congenital obstructive defects of renal pelvis and ureter (Q62.0-Q62.3)
  • hydronephrosis with ureteropelvic junction obstruction (Q62.11)
  • obstructive pyelonephritis (N11.1)
From Chapter 14 (N00-N99) Diseases of the genitourinary system applies to 838 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name N13.71, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming N13.71: they are not reported together with it, unless the two conditions are unrelated.

  • N11.1 Chronic obstructive pyelonephritis
    obstructive uropathy (N13.-) names N13.-, which includes this code

Code Also 3

These codes say N13.71 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • N80.A4 Superficial endometriosis of ureter
    if applicable, obstructive and reflux uropathy (N13.-) names N13.-, which includes this code
  • N80.A5 Deep endometriosis of ureter
    if applicable, obstructive and reflux uropathy (N13.-) names N13.-, which includes this code
  • N80.A6 Endometriosis of ureter, unspecified depth
    if applicable, obstructive and reflux uropathy (N13.-) names N13.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

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

Clinical InformationClinical

  • Vesico-Ureteral Reflux

    retrograde flow of urine from the urinary bladder into the ureter. this is often due to incompetence of the vesicoureteral valve.

Patient EducationClinical

Ureteral Disorders

Your kidneys make urine by filtering wastes and extra water from your blood. The urine travels from the kidneys to the bladder in two thin tubes called ureters.

Read the full article at MedlinePlus

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

Convert N13.71 to ICD-9-CMHistory

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

ICD-9-CM
593.70 Vescouretrl rflux unspcf
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About N13.71Overview

What is the ICD-10 code for vesicoureteral-reflux without reflux nephropathy?

The ICD-10-CM code for vesicoureteral-reflux without reflux nephropathy is N13.71 (sometimes written as N1371). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is N13.71 (Vesicoureteral-reflux) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report vesicoureteral-reflux without reflux nephropathy on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does N13.71 group to?

When vesicoureteral-reflux without reflux nephropathy is the principal diagnosis on an inpatient stay, it groups to MS-DRG 699, 698, 700, with relative weights from 0.6740 to 1.6400 depending on complications. Higher weights mean higher Medicare reimbursement.

Can N13.71 be reported with N11.0?

Not as a rule. The Excludes1 note at N13.7, which applies to N13.71, lists "reflux-associated pyelonephritis (N11.0)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of N13.71?

Under the General Equivalence Mappings, vesicoureteral-reflux without reflux nephropathy converts to ICD-9-CM 593.70 (vescouretrl rflux unspcf). The mapping is approximate, so confirm the match fits the documentation.