2027 ICD-10-CM Diagnosis Code N51Disorders of male genital organs in diseases classified elsewhere

ICD-10-CM Codes›N00–N99›N40-N53›N51

ICD-10-CM N51
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

N51 is a billable ICD-10-CM diagnosis code for disorders of male genital organs in diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 729 through 730. The code is a manifestation code that cannot be reported as the principal diagnosis. Coders also document this condition as chylocele. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified male genital disorders.

Code Identity

ICD-10-CM Code
N51
Billable Status
Yes — Valid for Submission
Code Describes
Disorders of male genital organs in diseases classified elsewhere
Short Description
Disorders of male genital organs in diseases classd elswhr
Chapter
N40-N53
Diseases of male genital organs

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN40-N53Diseases of male genital organs
CategoryN51Disorders of male genital organs in diseases classified elsewhere
This CodeN51Disorders of male genital organs in diseases classified elsewhere

Code EditsBilling

Medicare Code Editor checks that affect claim validity for N51.

Manifestation diagnoses
Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chylocele
  • Chylocele of tunica vaginalis caused by Loa loa
  • Epididymitis associated with another disorder
  • Infection by Loa loa
  • Infection caused by Loa
  • Male genital organ disorder associated with another disorder
  • Orchitis associated with another disorder

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N51: its own notes plus those printed at Chapter 14. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • amebic balanitis (A06.8)
  • candidal balanitis (B37.42)
  • gonococcal balanitis (A54.23)
  • gonococcal prostatitis (A54.22)
  • herpesviral [herpes simplex] balanitis (A60.01)
  • trichomonal prostatitis (A59.02)
  • tuberculous prostatitis (A18.14)

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 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)

Code First

The underlying condition named in the note is sequenced before this code.

  • underlying disease, such as:
  • filariasis (B74.0-B74.9)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Clinical ClassificationClinical

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

CCSR GEN016
Other specified male genital disorders
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Penis Disorders

Problems with the penis can cause pain and affect a man's sexual function and fertility. Penis disorders include:

Read the full article at MedlinePlus

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

Convert N51 to ICD-9-CMHistory

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

ICD-9-CM
608.81 Male gen dis in oth dis
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About N51Overview

What is the ICD-10 code for disorders of male genital organs in diseases classified elsewhere?

The ICD-10-CM code for disorders of male genital organs in diseases classified elsewhere is N51. It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is N51 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report disorders of male genital organs in diseases classified elsewhere on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does N51 group to?

On inpatient claims, disorders of male genital organs in diseases classified elsewhere maps to MS-DRG 729, 730, with relative weights from 0.6595 to 1.0553 depending on complications. Higher weights mean higher Medicare reimbursement.

Can N51 be a principal diagnosis?

No. This is a manifestation code: disorders of male genital organs in diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.

Can N51 be reported with A06.8?

Not as a rule. The Excludes1 note on N51 lists "amebic balanitis (A06.8)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).