Vero
U.S. ICD-10-CM · April 2026

N13 ICD-10-CM Code: Obstructive and reflux uropathy

A clear reference for the official code description, hierarchy, and related coding information from the April 2026 U.S. release.

Code definition

Official description

N13

Obstructive and reflux uropathy

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where N13 sits

  1. 1

    Chapter 14

    Diseases of the genitourinary system (N00-N99)

  2. 2

    Section

    Renal tubulo-interstitial diseases (N10-N16)

  3. 3

    Category N13

    Obstructive and reflux uropathy

  4. 4

    Code N13

    Obstructive and reflux uropathy

More specific choices

Codes under N13

N13 is a non-billable category. Choose the child code that best matches the documented diagnosis.

N13.0

Hydronephrosis with ureteropelvic junction obstruction

N13.1

Hydronephrosis with ureteral stricture, not elsewhere classified

N13.2

Hydronephrosis with renal and ureteral calculous obstruction

N13.3

Other and unspecified hydronephrosis

N13.4

Hydroureter

N13.5

Crossing vessel and stricture of ureter without hydronephrosis

N13.6

Pyonephrosis

N13.7

Vesicoureteral-reflux

N13.8

Other obstructive and reflux uropathy

N13.9

Obstructive and reflux uropathy, unspecified

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for N13.

Code first

No “code first” instruction is listed for N13.

Use additional code

No “use additional code” instruction is listed for N13.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for N13.

Excludes2

Conditions not included here that may be reported separately when present.

  • 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)

Transparency

Source and release

Data release

U.S. ICD-10-CM · April 2026

Effective date

Apr 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code N13 mean?

N13 is the April 2026 U.S. ICD-10-CM code for “Obstructive and reflux uropathy.”

Is N13 a billable or specific ICD-10-CM code?

No. N13 has more specific child codes in the April 2026 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is N13 located in ICD-10-CM?

N13 is listed in Chapter 14, Diseases of the genitourinary system (N00-N99), within Renal tubulo-interstitial diseases (N10-N16) (N10–N16), under category N13, Obstructive and reflux uropathy.

What coding notes are listed for N13?

No inclusion terms are listed for N13 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. Excludes2 notes: 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).

Ready to transform your clinical documentation?

Join Vero and see how effortless documentation can be.

Try for free

  • No credit card required

  • Cancel anytime