2026 ICD-10-CM Diagnosis Code N46.123Oligospermia due to obstruction of efferent ducts

ICD-10-CM Codes›N00–N99›N40-N53›N46

ICD-10-CM N46.123
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N46.123 is a billable ICD-10-CM diagnosis code for oligospermia due to obstruction of efferent ducts. 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 restricted by the Medicare Code Editor to adult patients (age 15 through 124). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Male infertility.

Code Identity

ICD-10-CM Code
N46.123
Billable Status
Yes — Valid for Submission
Code Describes
Oligospermia due to obstruction of efferent ducts
Short Description
Oligospermia due to obstruction of efferent ducts
Same as the full description in the CMS dataset.
Parent Code
N46.12
Oligospermia due to extratesticular causes

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN40-N53Diseases of male genital organs
CategoryN46Male infertility
This CodeN46.123Oligospermia due to obstruction of efferent ducts

Code EditsBilling

Medicare Code Editor checks that affect claim validity for N46.123.

Adult diagnoses
The Medicare Code Editor detects inconsistencies in adult cases by checking a patient's age and any diagnosis on the patient's record. The adult code edits apply to patients age range is 15–124 years inclusive (e.g., senile delirium, mature cataract).

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.

    • Infertility
      • male
        • oligospermia
          • extratesticular cause
            • efferent duct obstruction
    • Oligospermia
      • due to
        • efferent duct obstruction

Clinical ClassificationClinical

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

CCSR GEN015
Male infertility
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Male Infertility

Infertility is a term doctors use if a man hasn't been able to get a woman pregnant after at least one year of trying. Causes of male infertility include:

Read the full article at MedlinePlus

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

Convert N46.123 to ICD-9-CMHistory

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

ICD-9-CM
606.1 Oligospermia
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 N46.123Overview

Is N46.123 (Oligospermia due to extratesticular causes) a billable code?

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

What MS-DRG does N46.123 group to?

When oligospermia due to obstruction of efferent ducts 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.

Who can N46.123 be reported for?

The Medicare Code Editor checks oligospermia due to obstruction of efferent ducts against patient demographics: this code is intended for adult patients (age 15 through 124). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of N46.123?

Under the General Equivalence Mappings, oligospermia due to obstruction of efferent ducts converts to ICD-9-CM 606.1 (oligospermia). 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.