2026 ICD-10-CM Diagnosis Code N43.40Spermatocele of epididymis, unspecified

ICD-10-CM Codes›N00–N99›N40-N53›N43

ICD-10-CM N43.40
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N43.40 is a billable ICD-10-CM diagnosis code for spermatocele of epididymis, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 729 through 730. Coders also document this condition as cyst of epididymis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified male genital disorders.

Code Identity

ICD-10-CM Code
N43.40
Billable Status
Yes — Valid for Submission
Code Describes
Spermatocele of epididymis, unspecified
Short Description
Spermatocele of epididymis, unspecified
Same as the full description in the CMS dataset.
Parent Code
N43.4
Spermatocele of epididymis

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN40-N53Diseases of male genital organs
CategoryN43Hydrocele and spermatocele
This CodeN43.40Spermatocele of epididymis, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cyst of epididymis
  • Spermatocele

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.

    • Spermatocele

Clinical ClassificationClinical

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

CCSR GEN016
Other specified male genital disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Spermatocele

    a cystic dilation of the epididymis, usually in the head portion (caput epididymis). the cyst fluid contains dead spermatozoa and can be easily differentiated from testicular hydrocele and other testicular lesions.

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.

Convert N43.40 to ICD-9-CMHistory

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

ICD-9-CM
608.1 Spermatocele
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 N43.40Overview

Is N43.40 (Spermatocele of epididymis) a billable code?

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

What MS-DRG does N43.40 group to?

When spermatocele of epididymis, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 729, 730, with relative weights from 0.6720 to 1.0587 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of N43.40?

Under the General Equivalence Mappings, spermatocele of epididymis, unspecified converts to ICD-9-CM 608.1 (spermatocele). The mapping is approximate, so confirm the match fits the documentation.

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.