2026 ICD-10-CM Diagnosis Code N50.0Atrophy of testis

ICD-10-CM Codes›N00–N99›N40-N53›N50

ICD-10-CM N50.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N50.0 is a billable ICD-10-CM diagnosis code for atrophy of testis. 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 androgen-induced testicular atrophy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified male genital disorders.

Code Identity

ICD-10-CM Code
N50.0
Billable Status
Yes — Valid for Submission
Code Describes
Atrophy of testis
Short Description
Atrophy of testis
Same as the full description in the CMS dataset.
Parent Code
N50
Other and unspecified disorders of male genital organs

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN40-N53Diseases of male genital organs
CategoryN50Other and unspecified disorders of male genital organs
This CodeN50.0Atrophy of testis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Androgen-induced testicular atrophy
  • Atrophy of testis
  • Bilateral atrophy of testes

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.

    • Atrophy, atrophic(of)
      • testis

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

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 N50.0 to ICD-9-CMHistory

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

ICD-9-CM
608.3 Atrophy of testis
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 N50.0Overview

Is N50.0 (Other and unspecified disorders of male genital organs) a billable code?

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

What MS-DRG does N50.0 group to?

When atrophy of testis 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 N50.0?

Under the General Equivalence Mappings, atrophy of testis converts to ICD-9-CM 608.3 (atrophy of testis). 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.