2026 ICD-10-CM Diagnosis Code N48.31Priapism due to trauma

ICD-10-CM Codes›N00–N99›N40-N53›N48

ICD-10-CM N48.31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

N48.31 is a billable ICD-10-CM diagnosis code for priapism due to trauma. 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 priapism. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified male genital disorders.

Code Identity

ICD-10-CM Code
N48.31
Billable Status
Yes — Valid for Submission
Code Describes
Priapism due to trauma
Short Description
Priapism due to trauma
Same as the full description in the CMS dataset.
Parent Code
N48.3
Priapism

Code Classification

ChapterN00–N99Diseases of the genitourinary system
SectionN40-N53Diseases of male genital organs
CategoryN48Other disorders of penis
This CodeN48.31Priapism due to trauma

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Priapism
  • Priapism due to trauma

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.

    • Priapism
      • due to
        • trauma

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

Clinical InformationClinical

  • Priapism

    a prolonged painful erection that may lasts hours and is not associated with sexual activity. it is seen in patients with sickle cell anemia, advanced malignancy, spinal trauma; and certain drug treatments.

  • Priapism

    persistent and usually painful erection that lasts for at least four hours in the absence of physical or psychological stimulation, which can be caused by hematologic disorders, including sickle cell disease and leukemia, spinal cord injuries, and medications.

Patient EducationClinical

Penis Disorders

Problems with the penis can cause pain and affect a man's sexual function and fertility. Penis disorders include:

Read the full article at MedlinePlus

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

Convert N48.31 to ICD-9-CMHistory

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

ICD-9-CM
607.3 Priapism
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 N48.31Overview

Is N48.31 (Priapism) a billable code?

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

What MS-DRG does N48.31 group to?

When priapism due to trauma 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 N48.31?

Under the General Equivalence Mappings, priapism due to trauma converts to ICD-9-CM 607.3 (priapism). 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.