2026 ICD-10-CM Diagnosis Code N36.1Urethral diverticulum

ICD-10-CM Codes›N00–N99›N30-N39›N36

ICD-10-CM N36.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N36.1 is a billable ICD-10-CM diagnosis code for urethral diverticulum. 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 degenerative disorder of urethra. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified diseases of bladder and urethra.

Code Identity

ICD-10-CM Code
N36.1
Billable Status
Yes — Valid for Submission
Code Describes
Urethral diverticulum
Short Description
Urethral diverticulum
Same as the full description in the CMS dataset.
Parent Code
N36
Other disorders of urethra

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN30-N39Other diseases of the urinary system
CategoryN36Other disorders of urethra
This CodeN36.1Urethral diverticulum

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Degenerative disorder of urethra
  • Urethral diverticulum

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.

    • Diverticulum, diverticula(multiple)
      • urethra (acquired)
    • Sacculation
      • urethra

Clinical ClassificationClinical

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

CCSR GEN007
Other specified and unspecified diseases of bladder and urethra
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Urethral Diverticulum

    a pouch or sac-like protrusion in the urethra.

Patient EducationClinical

Urethral Disorders

The urethra is the tube that allows urine to pass out of the body. In men, it's a long tube that runs through the penis. It also carries semen in men. In women, it's short and is just above the vagina. Urethral problems may happen due to aging, illness, or injury. They include:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert N36.1 to ICD-9-CMHistory

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

ICD-9-CM
599.2 Urethral diverticulum
Exact Match The mapping is direct, with no qualifiers.

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 N36.1Overview

Is N36.1 (Other disorders of urethra) a billable code?

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

What MS-DRG does N36.1 group to?

When urethral diverticulum 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 N36.1?

Under the General Equivalence Mappings, urethral diverticulum converts to ICD-9-CM 599.2 (urethral diverticulum). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.