2026 ICD-10-CM Diagnosis Code N13Obstructive and reflux uropathy

ICD-10-CM Codes›N00–N99›N10-N16›N13

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

N13 is a non-billable ICD-10-CM category code for obstructive and reflux uropathy, so it cannot be submitted on claims. Use a more specific code from this category instead, such as N13.0, N13.1, N13.2, and N13.30.

Code Identity

ICD-10-CM Code
N13
Billable Status
No — Non-Billable Category
Code Describes
Obstructive and reflux uropathy
Chapter
N10-N16
Renal tubulo-interstitial diseases

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN10-N16Renal tubulo-interstitial diseases
CategoryN13Obstructive and reflux uropathy
This CodeN13Obstructive and reflux uropathy

Specific Coding for Obstructive and reflux uropathyOverview

Non-specific codes like N13 require more characters. Use one of these billable codes instead:

  • Use N13.0 for Hydronephrosis with ureteropelvic junction obstruction

  • Use N13.1 for Hydronephrosis with ureteral stricture, not elsewhere classified

  • Use N13.2 for Hydronephrosis with renal and ureteral calculous obstruction

  • N13.3 for Other and unspecified hydronephrosis

  • Use N13.30 for Unspecified hydronephrosis

  • Use N13.39 for Other hydronephrosis

  • Use N13.4 for Hydroureter

  • Use N13.5 for Crossing vessel and stricture of ureter without hydronephrosis

  • Use N13.6 for Pyonephrosis

  • N13.7 for Vesicoureteral-reflux

  • Use N13.70 for Vesicoureteral-reflux, unspecified

  • Use N13.71 for Vesicoureteral-reflux without reflux nephropathy

  • N13.72 for Vesicoureteral-reflux with reflux nephropathy without hydroureter

  • N13.73 for Vesicoureteral-reflux with reflux nephropathy with hydroureter

  • Use N13.8 for Other obstructive and reflux uropathy

  • Use N13.9 for Obstructive and reflux uropathy, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 2 Excludes

  • 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

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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 N13Overview

Is N13 (Obstructive and reflux uropathy) a billable code?

No. This is a category header that groups the codes for obstructive and reflux uropathy, and headers cannot be submitted on claims. Claims for obstructive and reflux uropathy need a more specific code from this category, such as N13.0, N13.1, and N13.2.