2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

N36.1 is a billable ICD-10-CM diagnosis code for urethral diverticulum. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N36.1: its own notes plus those printed at block N30-N39 and Chapter 14. A note printed at a category, block or chapter applies to every code under it.

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.

From Block N30-N39 Other diseases of the urinary system applies to 85 codes
  • urinary infection (complicating):
  • abortion or ectopic or molar pregnancy (O00-O07, O08.8)
  • pregnancy, childbirth and the puerperium (O23.-, O75.3, O86.2-)
From Chapter 14 (N00-N99) Diseases of the genitourinary system applies to 838 codes
  • 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.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About N36.1Overview

What is the ICD-10 code for urethral diverticulum?

The ICD-10-CM code for urethral diverticulum is N36.1 (sometimes written as N361). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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, 2026 through September 30, 2027.

What MS-DRG does N36.1 group to?

When urethral diverticulum is the principal diagnosis on an inpatient stay, it groups to MS-DRG 699, 698, 700, with relative weights from 0.6740 to 1.6400 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.