2026 ICD-10-CM Diagnosis Code N44.03Torsion of appendix testis

ICD-10-CM Codes›N00–N99›N40-N53›N44

ICD-10-CM N44.03
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N44.03 is a billable ICD-10-CM diagnosis code for torsion of appendix 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 torsion of appendix of testis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified male genital disorders.

Code Identity

ICD-10-CM Code
N44.03
Billable Status
Yes — Valid for Submission
Code Describes
Torsion of appendix testis
Short Description
Torsion of appendix testis
Same as the full description in the CMS dataset.
Parent Code
N44.0
Torsion of testis

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN40-N53Diseases of male genital organs
CategoryN44Noninflammatory disorders of testis
This CodeN44.03Torsion of appendix testis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Torsion of appendix of testis
  • Torsion of testis

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.

    • Torsion
      • appendix testis
    • Torsion
      • hydatid of Morgagni
        • male
    • Torsion
      • testis, testicle
        • appendix

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 N44.03 to ICD-9-CMHistory

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

ICD-9-CM
608.23 Torsion appendix 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 N44.03Overview

Is N44.03 (Torsion of testis) a billable code?

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

What MS-DRG does N44.03 group to?

When torsion of appendix 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 N44.03?

Under the General Equivalence Mappings, torsion of appendix testis converts to ICD-9-CM 608.23 (torsion appendix testis). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.