2027 ICD-10-CM Diagnosis Code N13.5Crossing vessel and stricture of ureter without hydronephrosis
ICD-10-CM Codes›N00–N99›N10-N16›N13
- Billable — Valid for Submission
- Chronic Condition
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 2027 (October 1, 2026 through September 30, 2027) 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
Code Classification
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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to N13.5: its own notes plus those printed at N13, block N10-N16, and Chapter 14. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Kinking and stricture of ureter without hydronephrosis
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)
- pyeloureteritis cystica (N28.85)
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name N13.5, its category, or a range that includes it.
Excludes1 3
These codes carry an Excludes1 note naming N13.5: they are not reported together with it, unless the two conditions are unrelated.
Code Also 4
These codes say N13.5 may also be needed to fully describe the condition. The note gives no sequencing direction.
- K68.2 Retroperitoneal fibrosisif applicable, associated obstruction of ureter (N13.5)
- N80.A4 Superficial endometriosis of ureterif applicable, obstructive and reflux uropathy (N13.-) names N13.-, which includes this code
- N80.A5 Deep endometriosis of ureterif applicable, obstructive and reflux uropathy (N13.-) names N13.-, which includes this code
- N80.A6 Endometriosis of ureter, unspecified depthif applicable, obstructive and reflux uropathy (N13.-) names N13.-, which includes this code
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
ureter N13.5
ureter N13.5
Constriction See Also: Stricture;
Disease, diseased See Also: Syndrome;
Ormond's N13.5
ureter N13.5
ureteropelvic junction N13.5
ureterovesical orifice N13.5
Spasm (s), spastic, spasticity See Also: condition; R25.2
ureter N13.5
Stricture See Also: Stenosis;
ureter (postoperative) N13.5
ureterovesical orifice N13.5
Syndrome See Also: Disease;
Ormond's N13.5
periurethral fibrosis N13.5
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
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.
Code HistoryHistory
Questions About N13.5Overview
What is the ICD-10 code for crossing vessel and stricture of ureter without hydronephrosis?
The ICD-10-CM code for crossing vessel and stricture of ureter without hydronephrosis is N13.5 (sometimes written as N135). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
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 0.8008 to 1.1415 depending on complications. Higher weights mean higher Medicare reimbursement.
Can N13.5 be reported with N13.6?
Not as a rule. The Excludes1 note on N13.5 lists "Crossing vessel and stricture of ureter without hydronephrosis with infection (N13.6)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
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.
