2024 ICD-10-CM Diagnosis Code A48.1

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Legionnaires’ disease

  • A48.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2024 edition of ICD-10-CM A48.1 became effective on October 1, 2023.
  • This is the American ICD-10-CM version of A48.1 – other international versions of ICD-10 A48.1 may differ.

The following code(s) above A48.1 contain annotation back-references

 that may be applicable to A48.1:

  • A00-B99  Certain infectious and parasitic diseases
  • A48  Other bacterial diseases, not elsewhere classified

Approximate Synonyms

  • Legionnaire’s disease
  • Legionnaires disease

Clinical Information

  • An acute, sometimes fatal, pneumonia-like bacterial infection characterized by high fever, malaise, muscle aches, respiratory disorders and headache. It is named for an outbreak at the 1976 philadelphia convention of the american legion.
  • 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 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. The bacteria are more likely to make you sick if you
    • are older than 65
    • smoke
    • have a lung disease
    • have a weak immune system
    legionnaires’ disease is serious and can be life-threatening. However, most people recover with antibiotic treatment. Centers for Disease Control and Prevention.

ICD-10-CM A48.1 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):

  • 177 Respiratory infections and inflammations with mcc
  • 178 Respiratory infections and inflammations with cc
  • 179 Respiratory infections and inflammations without cc/mcc
  • 791 Prematurity with major problems
  • 793 Full term neonate with major problems
  • 974 Hiv with major related condition with mcc
  • 975 Hiv with major related condition with cc
  • 976 Hiv with major related condition without cc/mcc

Convert A48.1 to ICD-9-CMCode History

  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change

Code annotations containing back-references to A48.1:

  • Type 1 Excludes: J15

Diagnosis Index entries containing back-references to A48.1: