ICD-10 Diagnosis Code J15.9

Unspecified bacterial pneumonia

Diagnosis Code J15.9

ICD-10: J15.9
Short Description: Unspecified bacterial pneumonia
Long Description: Unspecified bacterial pneumonia
This is the 2018 version of the ICD-10-CM diagnosis code J15.9

Valid for Submission
The code J15.9 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Diseases of the respiratory system (J00–J99)
    • Influenza and pneumonia (J09-J18)
      • Bacterial pneumonia, not elsewhere classified (J15)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code J15.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • 482.9 - Bacterial pneumonia NOS

  • Bacterial pneumonia
  • Bacterial pneumonia associated with acquired immunodeficiency syndrome
  • Bacterial pneumonia co-occurrent with human immunodeficiency virus infection
  • Bronchopneumonia caused by bacteria
  • Chronic pneumonia
  • Disorder of respiratory system co-occurrent with human immunodeficiency virus infection
  • Healthcare associated bacterial pneumonia
  • Healthcare associated pneumonia
  • Pneumonia associated with acquired immunodeficiency syndrome
  • Recurrent bacterial infection
  • Recurrent bacterial pneumonia
  • Recurrent bacterial pneumonia co-occurrent with human immunodeficiency virus infection
  • Recurrent lower respiratory tract infection
  • Recurrent pneumonia
  • Respiratory disorder associated with acquired immunodeficiency syndrome
  • Secondary bacterial pneumonia

Index of Diseases and Injuries
References found for the code J15.9 in the Index of Diseases and Injuries:

Information for Patients


Also called: Bronchopneumonia

Pneumonia is an infection in one or both of the lungs. Many germs, such as bacteria, viruses, and fungi, can cause pneumonia. You can also get pneumonia by inhaling a liquid or chemical. People most at risk are older than 65 or younger than 2 years of age, or already have health problems.

Symptoms of pneumonia vary from mild to severe. See your doctor promptly if you

  • Have a high fever
  • Have shaking chills
  • Have a cough with phlegm that doesn't improve or gets worse
  • Develop shortness of breath with normal daily activities
  • Have chest pain when you breathe or cough
  • Feel suddenly worse after a cold or the flu

Your doctor will use your medical history, a physical exam, and lab tests to diagnose pneumonia. Treatment depends on what kind you have. If bacteria are the cause, antibiotics should help. If you have viral pneumonia, your doctor may prescribe an antiviral medicine to treat it.

Preventing pneumonia is always better than treating it. Vaccines are available to prevent pneumococcal pneumonia and the flu. Other preventive measures include washing your hands frequently and not smoking.

NIH: National Heart, Lung, and Blood Institute

  • Aspiration pneumonia (Medical Encyclopedia)
  • Atypical pneumonia (Medical Encyclopedia)
  • Hospital-acquired pneumonia (Medical Encyclopedia)
  • Mycoplasma pneumonia (Medical Encyclopedia)
  • Pneumonia (Medical Encyclopedia)
  • Pneumonia - adults - discharge (Medical Encyclopedia)
  • Pneumonia - children - community acquired (Medical Encyclopedia)
  • Pneumonia - children - discharge (Medical Encyclopedia)
  • Viral pneumonia (Medical Encyclopedia)

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