2026 ICD-10-CM Diagnosis Code Q53.10Unspecified undescended testicle, unilateral

ICD-10-CM Codes›Q00-Q99›Q50-Q56›Q53

ICD-10-CM Q53.10
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Q53.10 is a billable ICD-10-CM diagnosis code for unspecified undescended testicle, unilateral. 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. The code is exempt from POA reporting. Coders also document this condition as palpable undescended testicle. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Genitourinary congenital anomalies.

Code Identity

ICD-10-CM Code
Q53.10
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified undescended testicle, unilateral
Short Description
Unspecified undescended testicle, unilateral
Same as the full description in the CMS dataset.
Parent Code
Q53.1
Undescended testicle, unilateral

Code Classification

ChapterQ00-Q99Congenital malformations, deformations and chromosomal abnormalities
SectionQ50-Q56Congenital malformations of genital organs
CategoryQ53Undescended and ectopic testicle
This CodeQ53.10Unspecified undescended testicle, unilateral

Present on Admission (POA)Billing

Q53.10 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Palpable undescended testicle
  • Undescended left testicle
  • Undescended right testicle

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.

    • Cryptorchid, cryptorchism, cryptorchidism
      • unilateral
    • Maldescent, testis
      • unilateral
    • Nondescent(congenital)
      • testicle
        • unilateral

Clinical ClassificationClinical

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

CCSR MAL003
Genitourinary congenital anomalies
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 Q53.10 to ICD-9-CMHistory

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

ICD-9-CM
752.51 Undescended testis
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 Q53.10Overview

Is Q53.10 (Undescended testicle, unilateral) a billable code?

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

What MS-DRG does Q53.10 group to?

When unspecified undescended testicle, unilateral 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.

Is Q53.10 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for unspecified undescended testicle, unilateral on inpatient claims.

What is the ICD-9 equivalent of Q53.10?

Under the General Equivalence Mappings, unspecified undescended testicle, unilateral converts to ICD-9-CM 752.51 (undescended testis). The mapping is approximate, so confirm the match fits the documentation.

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.