2026 ICD-10-CM Diagnosis Code N39.9Disorder of urinary system, unspecified

ICD-10-CM Codes›N00–N99›N30-N39›N39

ICD-10-CM N39.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N39.9 is a billable ICD-10-CM diagnosis code for disorder of urinary system, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 698 through 700. Coders also document this condition as disorder of lower urinary tract. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Genitourinary signs and symptoms.

Code Identity

ICD-10-CM Code
N39.9
Billable Status
Yes — Valid for Submission
Code Describes
Disorder of urinary system, unspecified
Short Description
Disorder of urinary system, unspecified
Same as the full description in the CMS dataset.
Parent Code
N39
Other disorders of urinary system

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN30-N39Other diseases of the urinary system
CategoryN39Other disorders of urinary system
This CodeN39.9Disorder of urinary system, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disorder of lower urinary tract
  • Disorder of urinary system
  • Disorder of urinary tract
  • Fetal disorder due to maternal disorder of urinary tract
  • Hereditary disorder of the urinary system
  • Urinary complication
  • Urinary disorder treatment changed
  • Urinary disorder treatment started
  • Urinary sequelae of disorders

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.

    • Disease, diseased
      • urinary (tract)
    • Disorder(of)
      • urinary system
    • Problem(with) (related to)
      • urinary
    • Uropathy

Clinical ClassificationClinical

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

CCSR SYM011
Genitourinary signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Urinary Complication

    any disorder of the organs of the urinary system occurring as a consequence of injury to the urinary system.

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 N39.9 to ICD-9-CMHistory

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

ICD-9-CM
599.9 Urinary tract dis NOS
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 N39.9Overview

Is N39.9 (Other disorders of urinary system) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disorder of urinary system, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does N39.9 group to?

When disorder of urinary system, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 698, 699, 700, with relative weights from 0.6899 to 1.6544 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of N39.9?

Under the General Equivalence Mappings, disorder of urinary system, unspecified converts to ICD-9-CM 599.9 (urinary tract dis NOS). 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.