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ICD-10-CM 2027 diagnosis code

N13.73Vesicoureteral-reflux with reflux nephropathy with hydroureter

Not billable — use a more specific code

N13.73 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.Short description: Vesicoureteral-reflux w reflux nephropathy with hydroureter

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 N13.73

N13.73 is the ICD-10-CM diagnosis code for Vesicoureteral-reflux with reflux nephropathy with hydroureter. 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 a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within N13.7 (Vesicoureteral-reflux), N13.73 is specifically for Vesicoureteral-reflux with reflux nephropathy with hydroureter. Related codes cover unspecified (N13.70), without reflux nephropathy (N13.71) and with reflux nephropathy without hydroureter (N13.72).

To report this condition, pick the subcode that matches the documentation: N13.731 (unilateral), N13.732 (bilateral) and N13.739 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under N13.73

Notes that apply from higher levels

Instructions written at a parent level also apply to N13.73.

› From N13.7 Vesicoureteral-reflux
Excludes1
  • reflux-associated pyelonephritis (N11.0)
› From N13 Obstructive and reflux uropathy
Excludes2
  • 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)

Broader instructions also apply from N10-N16 Renal tubulo-interstitial diseases and Chapter 14: Diseases of the genitourinary system.

Codes whose notes reference N13.73

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about N13.73

Is N13.73 billable?

No. N13.73 is a header code. Report one of its more specific subcodes instead.