2026 ICD-10-CM Diagnosis Code N13.8Other obstructive and reflux uropathy
ICD-10-CM Codes›N00–N99›N10-N16›N13
- Billable — Valid for Submission
- Not Chronic
N13.8 is a billable ICD-10-CM diagnosis code for other obstructive and reflux uropathy. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 693 through 694. 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 obstructive nephropathy due to neurogenic bladder
- Benign prostatic hyperplasia
- Benign prostatic hyperplasia with outflow obstruction
- Clot retention of urine
- Disorder of urological anastomosis
- Hyperplasia of prostate
- Mechanical urinary obstruction
- Obstruction of urethra
- Obstructive nephropathy
- Obstructive nephropathy due to bladder cancer
- Obstructive nephropathy due to malignancy
- Obstructive nephropathy due to prostate cancer
- Obstructive nephropathy due to prostatic hypertrophy
- Obstructive vesicoureteric reflux
- Prostatic obstruction
- Retention of urine
- Stricture of urological anastomosis
- Urinary obstruction due to nodular prostate
- Urinary tract obstruction due to duplicated collecting system
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Urinary tract obstruction due to specified cause
Code First
- , if applicable, any causal condition, such as:
- enlarged prostate N40.1
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Dietl's crisis - N13.8
- pelvicalyceal - N13.8
- pyelosinus - N13.8
- Nephropathy - See Also: Nephritis; - N28.9
- obstructive - N13.8
- Obstruction, obstructed, obstructive
- renal - See Also: Hydronephrosis; - N28.89
- outflow - N13.8
- specified NEC - N13.8
- Ovary, ovarian - See Also: condition;
- vein syndrome - N13.8
- obstructive - N13.9
- specified NEC - N13.8
- specified NEC - N13.8
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Anuria
- postrenal
- Crisis
- Dietl's
- Dietl's crisis
- Extravasation
- pelvicalyceal
- Extravasation
- pyelosinus
- Nephropathy
- obstructive
- Obstruction, obstructed, obstructive
- renal
- outflow
- Obstruction, obstructed, obstructive
- urinary (moderate)
- specified NEC
- Ovary, ovarian
- vein syndrome
- Tortuous
- ureter
- Uropathy
- obstructive
- specified NEC
- Uropathy
- reflux
- specified NEC
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Bladder Diseases
The bladder is a hollow organ in your lower abdomen that stores urine. Many conditions can affect your bladder. Some common ones are:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert N13.8 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N13.8Overview
Is N13.8 (Obstructive and reflux uropathy) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other obstructive and reflux uropathy on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does N13.8 group to?
When other obstructive and reflux uropathy is the principal diagnosis on an inpatient stay, it groups to MS-DRG 693, 694, with relative weights from 0.7817 to 1.3445 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of N13.8?
Under the General Equivalence Mappings, other obstructive and reflux uropathy converts to ICD-9-CM 593.4 (ureteric obstruction NEC). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
