2027 ICD-10-CM Diagnosis Code N45Orchitis and epididymitis

ICD-10-CM Codes›N00–N99›N40-N53›N45

ICD-10-CM N45
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

N45 is a non-billable ICD-10-CM category code for orchitis and epididymitis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as N45.1, N45.2, N45.3, and N45.4.

Code Identity

ICD-10-CM Code
N45
Billable Status
No — Non-Billable Category
Code Describes
Orchitis and epididymitis
Short Description
Orchitis and epididymitis
Same as the full description in the CMS dataset.
Chapter
N40-N53
Diseases of male genital organs

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN40-N53Diseases of male genital organs
CategoryN45Orchitis and epididymitis
This CodeN45Orchitis and epididymitis

Specific Coding for Orchitis and epididymitisOverview

Non-specific codes like N45 require more characters. Use one of these billable codes instead:

  • Use N45.1 for Epididymitis

  • Use N45.2 for Orchitis

  • Use N45.3 for Epididymo-orchitis

  • Use N45.4 for Abscess of epididymis or testis

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to N45: its own notes plus those printed at 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 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)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

  • code (B95-B97), to identify infectious agent.

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name N45, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming N45: they are not reported together with it, unless the two conditions are unrelated.

  • N49 Inflammatory disorders of male genital organs, not elsewhere classified
    orchitis and epididymitis (N45.-)

Patient EducationClinical

Testicular Disorders

Testicles, or testes, make male hormones and sperm. They are two egg-shaped organs inside the scrotum, the loose sac of skin behind the penis. It's easy to injure your testicles because they are not protected by bones or muscles. Men and boys should wear athletic supporters when they play sports.

Read the full article at MedlinePlus

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

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 N45Overview

What is the ICD-10 code for orchitis and epididymitis?

N45 is the ICD-10-CM category for orchitis and epididymitis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is N45 (Orchitis and epididymitis) a billable code?

No. This is a category header that groups the codes for orchitis and epididymitis, and headers cannot be submitted on claims. Claims for orchitis and epididymitis need a more specific code from this category, such as N45.1, N45.2, and N45.3.

Does N45 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: code (B95-B97), to identify infectious agent.. The additional code is reported after N45.