ICD-10-CM 2027 diagnosis code
N13.5Crossing vessel and stricture of ureter without hydronephrosis
N13.5 is a valid, billable ICD-10-CM code for crossing vessel and stricture of ureter without hydronephrosis. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Crossing vessel and stricture of ureter w/o hydronephrosis
Looking up by condition? See ICD-10 code for Ureter kink, ICD-10 code for Ureter postoperative stricture, ICD-10 code for Pelviureteral junction obstruction.
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 N13.5
N13.5 is the ICD-10-CM diagnosis code for Crossing vessel and stricture of ureter without hydronephrosis. 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, choose N13.5 (Crossing vessel and stricture of ureter without hydronephrosis) only when documentation doesn't support a more specific option: hydronephrosis with ureteropelvic junction obstruction (N13.0), hydronephrosis with ureteral stricture, not elsewhere classified (N13.1), hydronephrosis with renal and ureteral calculous obstruction (N13.2), other and unspecified hydronephrosis (N13.3), hydroureter (N13.4), Pyonephrosis (N13.6), Vesicoureteral-reflux (N13.7), other obstructive and reflux uropathy (N13.8) and 1 more.
Don't report N13.5 together with the conditions in its Excludes1 note: Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6).
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 689 (Kidney and Urinary Tract Infections with MCC, relative weight 1.1415) and DRG 690 (Kidney and Urinary Tract Infections without MCC, relative weight 0.801), 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 593.3 (stricture or kinking of ureter).
Coding notes
- Kinking and stricture of ureter without hydronephrosis
- Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
Notes that apply from higher levels
Instructions written at a parent level also apply to N13.5.
Broader instructions also apply from N10-N16 Renal tubulo-interstitial diseases and Chapter 14: Diseases of the genitourinary system.
Alphabetic index entries
24 entriesTerms in the official ICD-10-CM index that lead to N13.5.
- 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
Codes whose notes reference N13.5
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 →- 593.3Stricture or kinking of ureterapproximate
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 N13.5
Is N13.5 billable?
- Yes. N13.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can N13.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict N13.5 as a principal diagnosis.
Is N13.5 a CC or MCC?
- No. N13.5 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does N13.5 group to?
- N13.5 is used in the MS-DRG v44.0 logic for MS-DRG 689 (Kidney and Urinary Tract Infections with MCC) and MS-DRG 690 (Kidney and Urinary Tract Infections without 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 N13.5?
- The CMS General Equivalence Mappings map N13.5 to ICD-9-CM 593.3.