A48.2 - Nonpneumonic Legionnaires' disease [Pontiac fever]

Version 2023
ICD-10:A48.2
Short Description:Nonpneumonic Legionnaires' disease [Pontiac fever]
Long Description:Nonpneumonic Legionnaires' disease [Pontiac fever]
Status: Valid for Submission
Version:ICD-10-CM 2023
Code Classification:
  • Certain infectious and parasitic diseases (A00–B99)
    • Other bacterial diseases (A30-A49)
      • Other bacterial diseases, not elsewhere classified (A48)

A48.2 is a billable ICD-10 code used to specify a medical diagnosis of nonpneumonic legionnaires' disease [pontiac fever]. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 for the submission of HIPAA-covered transactions.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Clinical Information

Index to Diseases and Injuries References

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for this diagnosis code are found in the injuries and diseases index:

Convert to ICD-9 Code

Source ICD-10 CodeTarget ICD-9 Code
A48.2040.89 - Bacterial diseases NEC
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education


Legionnaires' Disease

Legionnaires' disease is a type of pneumonia caused by bacteria. You usually get it by breathing in mist from water that contains the bacteria. The mist may come from hot tubs, showers, or air-conditioning units for large buildings. The bacteria don't spread from person to person.

Symptoms of Legionnaires' disease include high fever, chills, a cough, and sometimes muscle aches and headaches. Other types of pneumonia have similar symptoms. You will probably need a chest x-ray to diagnose the pneumonia. Lab tests can detect the specific bacteria that cause Legionnaires' disease.

Most people exposed to the bacteria do not become sick. You are more likely to get sick if you:

Legionnaires' disease is serious and can be life-threatening. However, most people recover with antibiotic treatment.

Centers for Disease Control and Prevention


[Learn More in MedlinePlus]

Code History