ICD-10-CM 2027 diagnosis code
N13.71Vesicoureteral-reflux without reflux nephropathy
N13.71 is a valid, billable ICD-10-CM code for vesicoureteral-reflux without reflux nephropathy. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About N13.71
N13.71 is the ICD-10-CM diagnosis code for Vesicoureteral-reflux without reflux nephropathy. It belongs to category N13 (obstructive and reflux uropathy), block N10-N16 (renal tubulo-interstitial diseases) and chapter 14 (diseases of the genitourinary system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within N13.7, choose N13.71 (without reflux nephropathy) only when documentation doesn't support a more specific option: unspecified (N13.70), with reflux nephropathy without hydroureter (N13.72) and with reflux nephropathy with hydroureter (N13.73).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 698 (Other Kidney and Urinary Tract Diagnoses with MCC, relative weight 1.6398), DRG 699 (Other Kidney and Urinary Tract Diagnoses with CC, relative weight 1.0003) and DRG 700 (Other Kidney and Urinary Tract Diagnoses without CC/MCC, relative weight 0.6741), in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 593.70 (vesicoureteral reflux unspecified or without reflux nephropathy).
Notes that apply from higher levels
Instructions written at a parent level also apply to N13.71.
› From N13.7 Vesicoureteral-reflux
- reflux-associated pyelonephritis (N11.0)
Broader instructions also apply from N10-N16 Renal tubulo-interstitial diseases and Chapter 14: Diseases of the genitourinary system.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to N13.71.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 11 · Diseases and Disorders of the Kidney and Urinary Tract
ICD-9-CM equivalent
Converter →- 593.70Vesicoureteral reflux unspecified or without reflux nephropathyapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about N13.71
Is N13.71 billable?
- Yes. N13.71 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N13.71 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N13.71 as a principal diagnosis.
Is N13.71 a CC or MCC?
- No. N13.71 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does N13.71 group to?
- N13.71 is used in the MS-DRG v44.0 logic for MS-DRG 698 (Other Kidney and Urinary Tract Diagnoses with MCC), MS-DRG 699 (Other Kidney and Urinary Tract Diagnoses with CC) and MS-DRG 700 (Other Kidney and Urinary Tract Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for N13.71?
- The CMS General Equivalence Mappings map N13.71 to ICD-9-CM 593.70.