2026 ICD-10-CM Diagnosis Code N13.5Crossing vessel and stricture of ureter without hydronephrosis

ICD-10-CM Codes›N00–N99›N10-N16›N13

ICD-10-CM N13.5
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N13.5 is a billable ICD-10-CM diagnosis code for crossing vessel and stricture of ureter without hydronephrosis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 689 through 690. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified diseases of kidney and ureters.

Code Identity

ICD-10-CM Code
N13.5
Billable Status
Yes — Valid for Submission
Code Describes
Crossing vessel and stricture of ureter without hydronephrosis
Short Description
Crossing vessel and stricture of ureter w/o hydronephrosis
Parent Code
N13
Obstructive and reflux uropathy

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN10-N16Renal tubulo-interstitial diseases
CategoryN13Obstructive and reflux uropathy
This CodeN13.5Crossing vessel and stricture of ureter without hydronephrosis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired stricture of ureter
  • Complete obstruction of the urinary tract
  • Complete occlusion of ureter by external compression
  • Drug-induced retroperitoneal fibrosis
  • Extrinsic ureteral obstruction
  • Idiopathic retroperitoneal fibrosis
  • Kinking of ureter
  • Kinking of ureter without obstruction
  • Malignant retroperitoneal fibrosis
  • Obstruction of pelviureteric junction
  • Obstruction of ureter
  • Obstruction of ureteral orifice
  • Obstruction of vesicoureteric junction
  • Occlusion of ureter
  • Postoperative kinking of ureter
  • Postoperative stricture
  • Postoperative ureteric constriction
  • Retroperitoneal fibrosis
  • Stenosis of ureter
  • Stenosis of vesicoureteric junction
  • Stricture of ureter
  • Stricture of ureter co-occurrent and due to crossing vessel
  • Stricture of vesicoureteric junction

Tabular List NotesGuidance

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

Inclusion Terms

  • Kinking and stricture of ureter without hydronephrosis

Type 1 Excludes

  • Crossing vessel and stricture of ureter without hydronephrosis with infection N13.6

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Angulation
      • ureter
    • Compression
      • ureter
    • Constriction
      • spastic
        • ureter
    • Constriction
      • ureter
    • Contraction(s), contracture, contracted
      • ureterovesical orifice (postinfectional)
    • Disease, diseased
      • Ormond's
    • Fasciitis
      • perirenal (with ureteral obstruction)
    • Fibrosis, fibrotic
      • retroperitoneal
        • idiopathic (with ureteral obstruction)
    • Intussusception(bowel) (colon) (enteric) (ileocecal) (ileocolic) (intestine) ( rectum)
      • ureter (with obstruction)
    • Kink, kinking
      • ureter (pelvic junction)
    • Narrowing
      • ureter
    • Obliteration
      • ureter
    • Obstruction, obstructed, obstructive
      • pelviureteral junction
    • Obstruction, obstructed, obstructive
      • ureter (functional) (pelvic junction) NEC
    • Occlusion, occluded
      • ureter (complete) (partial)
    • Occlusion, occluded
      • ureteropelvic junction
    • Occlusion, occluded
      • ureterovesical orifice
    • Ormond's disease(with ureteral obstruction)
    • Prolapse, prolapsed
      • ureter
        • with obstruction
    • Spasm(s), spastic, spasticity
      • ureter
    • Stricture
      • ureter (postoperative)
    • Stricture
      • ureterovesical orifice
    • Syndrome
      • Ormond's
    • Syndrome
      • periurethral fibrosis

Clinical ClassificationClinical

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

CCSR GEN006
Other specified and unspecified diseases of kidney and ureters
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Retroperitoneal Fibrosis

    a slowly progressive condition of unknown etiology, characterized by deposition of fibrous tissue in the retroperitoneal space compressing the ureters, great vessels, bile duct, and other structures. when associated with abdominal aortic aneurysm, it may be called chronic periaortitis or inflammatory perianeurysmal fibrosis.

  • Idiopathic Retroperitoneal Fibrosis|Ormond's Disease

    a condition characterized by abnormal proliferation of fibrous tissue in the compartment posterior to the peritoneum, for which no underlying cause has been identified.

  • Retroperitoneal Fibrosis

    a rare, serious disorder characterized by extensive fibrosis in the retroperitoneum. in most cases its etiology is unknown. in some cases it is related to autoimmunity or metastatic cancer. it leads to the entrapment and obstruction of vital retroperitoneal structures including the ureters.

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 N13.5 to ICD-9-CMHistory

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

ICD-9-CM
593.3 Stricture of ureter
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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About N13.5Overview

Is N13.5 (Obstructive and reflux uropathy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report crossing vessel and stricture of ureter without hydronephrosis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does N13.5 group to?

When crossing vessel and stricture of ureter without hydronephrosis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 689, 690, with relative weights from 0.8095 to 1.1603 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of N13.5?

Under the General Equivalence Mappings, crossing vessel and stricture of ureter without hydronephrosis converts to ICD-9-CM 593.3 (stricture of ureter). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.