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
- CC — Complication or Comorbidity
- 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. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 68 closely related codes. 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
specified NEC N13.8
specified NEC N13.8
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:
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Convert N13.8 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N13.8Overview
What is the ICD-10 code for other obstructive and reflux uropathy?
The ICD-10-CM code for other obstructive and reflux uropathy is N13.8 (sometimes written as N138). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
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.
Is N13.8 a CC or MCC?
CMS lists N13.8 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 68 closely related codes in its exclusion list.
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.
