2026 ICD-10-CM Diagnosis Code C62.00Malignant neoplasm of unspecified undescended testis

ICD-10-CM Codes›C00–D49›C60-C63›C62

ICD-10-CM C62.00
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C62.00 is a billable ICD-10-CM diagnosis code for malignant neoplasm of unspecified undescended testis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 715 through 716, 722 through 724. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Male reproductive system cancers - testis.

Code Identity

ICD-10-CM Code
C62.00
Billable Status
Yes — Valid for Submission
Code Describes
Malignant neoplasm of unspecified undescended testis
Short Description
Malignant neoplasm of unspecified undescended testis
Same as the full description in the CMS dataset.
Parent Code
C62.0
Malignant neoplasm of undescended testis

Code Classification

ChapterC00–D49Neoplasms
SectionC60-C63Malignant neoplasms of male genital organs
CategoryC62Malignant neoplasm of testis
This CodeC62.00Malignant neoplasm of unspecified undescended testis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Malignant neoplasm of ectopic testis
  • Malignant neoplasm of undescended testis
  • Malignant teratoma
  • Malignant teratoma of testis
  • Malignant teratoma of undescended testis
  • Non-seminomatous germ cell neoplasm of testis
  • Primary malignant neoplasm of undescended testis
  • Primary non-seminomatous germ cell neoplasm of testis
  • Primary nonseminomatous germ cell neoplasm of undescended testis
  • Primary seminoma of undescended testis
  • Seminoma of undescended testis
  • Teratoma of testis

Clinical ClassificationClinical

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

CCSR NEO040
Male reproductive system cancers - testis
Default principal diagnosis: inpatient Yes · outpatient Yes

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
testis, testes › ectopicC62.0C79.82D07.69D29.2D40.1D49.59
testis, testes › retainedC62.0C79.82D07.69D29.2D40.1D49.59
testis, testes › undescendedC62.0C79.82D07.69D29.2D40.1D49.59

Patient EducationClinical

Testicular Cancer

Testicular cancer is a cancer that develops in the tissues of one or both testicles. The testicles, or testes, are part of the male reproductive system. They make male hormones and sperm. They are two egg-shaped glands inside the scrotum, a sac of loose skin that lies below the penis. You can get cancer in one or both testicles.

The full article covers:

  • What is testicular cancer?
  • Who is most likely to develop testicular cancer?
  • What are the symptoms of testicular cancer?
  • How is testicular cancer diagnosed?
  • What are the treatments for testicular cancer?

Read the full article at MedlinePlus

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

Convert C62.00 to ICD-9-CMHistory

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

ICD-9-CM
186.0 Mal neo undescend 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 C62.00Overview

Is C62.00 (Malignant neoplasm of undescended testis) a billable code?

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

What MS-DRG does C62.00 group to?

When malignant neoplasm of unspecified undescended testis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 715, 716, 722, 723, 724, with relative weights from 0.6117 to 2.2373 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of C62.00?

Under the General Equivalence Mappings, malignant neoplasm of unspecified undescended testis converts to ICD-9-CM 186.0 (mal neo undescend testis). 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.