2026 ICD-10-CM Diagnosis Code J15.8Pneumonia due to other specified bacteria

ICD-10-CM Codes›J00–J99›J09-J18›J15

ICD-10-CM J15.8
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J15.8 is a billable ICD-10-CM diagnosis code for pneumonia due to other specified bacteria. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 177 through 179, 974 through 976. 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
J15.8
Billable Status
Yes — Valid for Submission
Code Describes
Pneumonia due to other specified bacteria
Short Description
Pneumonia due to other specified bacteria
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 CodeJ15.8Pneumonia due to other specified bacteria

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Achromobacter pneumonia
  • Bronchopneumonia caused by Achromobacter
  • Infection caused by Acinetobacter
  • Infection caused by Enterococcus
  • Infection caused by vancomycin resistant Enterococcus
  • Meningococcal pneumonia
  • Pneumonia caused by Acinetobacter
  • Pneumonia caused by anaerobic bacteria
  • Pneumonia caused by Enterococcus
  • Pneumonia caused by Enterococcus faecalis
  • Pneumonia caused by Enterococcus faecium
  • Pneumonia caused by Gram positive bacteria
  • Pneumonia caused by vancomycin resistant Enterococcus

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)
      • anaerobes
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • bacillus
        • specified NEC
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • bacterial
        • specified NEC
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • Bacteroides (fragilis) (oralis) (melaninogenicus)
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • broncho-, bronchial (confluent) (croupous) (diffuse) (disseminated) (hemorrhagic) (involving lobes) (lobar) (terminal)
        • bacterial
          • specified NEC
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • Butyrivibrio (fibriosolvens)
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • Clostridium (haemolyticum) (novyi)
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • Eubacterium
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • Fusobacterium (nucleatum)
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • gram-negative bacteria NEC
        • anaerobic
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • in (due to)
        • specified
          • bacterium NEC
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • lobar (disseminated) (double) (interstitial)
        • bacterial
          • specified NEC
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • Peptococcus
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • Peptostreptococcus
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • specified NEC
        • bacterium NEC
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • Veillonella

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 J15.8 to ICD-9-CMHistory

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

ICD-9-CM
482.81 Pneumonia anaerobes
Approximate The match is approximate rather than exact.
ICD-9-CM
482.89 Pneumonia oth spcf bact
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 J15.8Overview

Is J15.8 (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 specified bacteria on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does J15.8 group to?

When pneumonia due to other specified bacteria is the principal diagnosis on an inpatient stay, it groups to MS-DRG 177, 178, 179, 974, 975, 976, with relative weights from 0.7550 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of J15.8?

Under the General Equivalence Mappings, pneumonia due to other specified bacteria converts to ICD-9-CM 482.81 (pneumonia anaerobes) and 482.89 (pneumonia oth spcf bact). 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.