2026 ICD-10-CM Diagnosis Code J04.31Supraglottitis, unspecified, with obstruction

ICD-10-CM Codes›J00–J99›J00-J06›J04

ICD-10-CM J04.31
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J04.31 is a billable ICD-10-CM diagnosis code for supraglottitis, unspecified, with obstruction. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 152 through 153. Coders also document this condition as laryngeal obstruction due to supraglottitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified upper respiratory infections.

Code Identity

ICD-10-CM Code
J04.31
Billable Status
Yes — Valid for Submission
Code Describes
Supraglottitis, unspecified, with obstruction
Short Description
Supraglottitis, unspecified, with obstruction
Same as the full description in the CMS dataset.
Parent Code
J04.3
Supraglottitis, unspecified

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ00-J06Acute upper respiratory infections
CategoryJ04Acute laryngitis and tracheitis
This CodeJ04.31Supraglottitis, unspecified, with obstruction

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Laryngeal obstruction due to supraglottitis

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.

    • Supraglottitis
      • with obstruction

Clinical ClassificationClinical

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

CCSR RSP006
Other specified upper respiratory infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Supraglottitis

    inflammation of the epiglottis and supraglottic structures including the pharynx; uvula; base of tongue; and aryepiglottic folds. it is usually caused by haemophilus influenzae in children but often by different organisms in adults.

Patient EducationClinical

Throat Disorders

Your throat is a tube that carries food to your esophagus and air to your windpipe and larynx. The technical name for your throat is the pharynx.

Read the full article at MedlinePlus

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

Convert J04.31 to ICD-9-CMHistory

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

ICD-9-CM
464.51 Supraglottis w obstr NOS
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 J04.31Overview

Is J04.31 (Supraglottitis, unspecified) a billable code?

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

What MS-DRG does J04.31 group to?

When supraglottitis, unspecified, with obstruction is the principal diagnosis on an inpatient stay, it groups to MS-DRG 152, 153, with relative weights from 0.7382 to 1.1822 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of J04.31?

Under the General Equivalence Mappings, supraglottitis, unspecified, with obstruction converts to ICD-9-CM 464.51 (supraglottis w obstr NOS). 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.