2026 ICD-10-CM Diagnosis Code J15.4Pneumonia due to other streptococci

ICD-10-CM Codes›J00–J99›J09-J18›J15

ICD-10-CM J15.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J15.4 is a billable ICD-10-CM diagnosis code for pneumonia due to other streptococci. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 193 through 195, 974 through 976. Coders also document this condition as bronchopneumonia caused by Group A Streptococcus. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections and Pneumonia (except that caused by tuberculosis).

Code Identity

ICD-10-CM Code
J15.4
Billable Status
Yes — Valid for Submission
Code Describes
Pneumonia due to other streptococci
Short Description
Pneumonia due to other streptococci
Same as the full description in the CMS dataset.
Parent Code
J15
Bacterial pneumonia, not elsewhere classified

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ09-J18Influenza and pneumonia
CategoryJ15Bacterial pneumonia, not elsewhere classified
This CodeJ15.4Pneumonia due to other streptococci

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bronchopneumonia caused by Group A Streptococcus
  • Bronchopneumonia caused by Streptococcus
  • Pneumonia caused by Streptococcus
  • Pneumonia caused by Streptococcus pyogenes
  • Streptococcus pyogenes infection

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

  • pneumonia due to streptococcus, group B J15.3
  • pneumonia due to Streptococcus pneumoniae J13

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.

    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • broncho-, bronchial (confluent) (croupous) (diffuse) (disseminated) (hemorrhagic) (involving lobes) (lobar) (terminal)
        • streptococcal NEC
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • in (due to)
        • Streptococcus
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • in (due to)
        • Streptococcus
          • specified NEC
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • lobar (disseminated) (double) (interstitial)
        • streptococcal NEC
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • streptococcal NEC (broncho) (lobar)
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • streptococcal NEC (broncho) (lobar)
        • group
          • A
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • streptococcal NEC (broncho) (lobar)
        • group
          • specified NEC

Clinical ClassificationClinical

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

CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient No · outpatient No
CCSR RSP002
Pneumonia (except that caused by tuberculosis)
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Pneumonia

Pneumonia is an infection in one or both of your lungs. It causes the air sacs of your lungs to fill up with fluid or pus. Pneumonia can range from mild to severe, depending on what caused it, your age, and your overall health.

The full article covers:

  • What is pneumonia?
  • What causes pneumonia?
  • Who is more likely to develop pneumonia?
  • What are the symptoms of pneumonia?
  • What other problems can pneumonia cause?
  • How is pneumonia diagnosed?
  • What are the treatments for pneumonia?
  • Can pneumonia be prevented?

Read the full article at MedlinePlus

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

Convert J15.4 to ICD-9-CMHistory

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

ICD-9-CM
482.31 Pneumonia strptococcus a
Approximate The match is approximate rather than exact.
ICD-9-CM
482.39 Pneumonia oth strep
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 J15.4Overview

Is J15.4 (Bacterial pneumonia, not elsewhere classified) a billable code?

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

What MS-DRG does J15.4 group to?

When pneumonia due to other streptococci is the principal diagnosis on an inpatient stay, it groups to MS-DRG 193, 194, 195, 974, 975, 976, with relative weights from 0.6285 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of J15.4?

Under the General Equivalence Mappings, pneumonia due to other streptococci converts to ICD-9-CM 482.31 (pneumonia strptococcus a) and 482.39 (pneumonia oth strep). 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.