ICD-10 Code A48.1

Legionnaires' disease

Version 2019 Billable Code
ICD-10: A48.1
Short Description:Legionnaires' disease
Long Description:Legionnaires' disease

Valid for Submission

ICD-10 A48.1 is a billable code used to specify a medical diagnosis of legionnaires' disease. The code is valid for the year 2019 for the submission of HIPAA-covered transactions.

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)
    • Other bacterial diseases (A30-A49)
      • Other bacterial diseases, not elsewhere classified (A48)

Information for Medical Professionals

Diagnostic Related Groups

The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). The diagnosis code A48.1 is grouped in the following groups for version MS-DRG V36.0 applicable from 10/01/2018 through 09/30/2019.

  • 177 - RESPIRATORY INFECTIONS AND INFLAMMATIONS WITH MCC
  • 178 - RESPIRATORY INFECTIONS AND INFLAMMATIONS WITH CC
  • 179 - RESPIRATORY INFECTIONS AND INFLAMMATIONS WITHOUT CC/MCC

Convert A48.1 to ICD-9

The following crosswalk between ICD-10 to ICD-9 is based based on the General Equivalence Mappings (GEMS) information:

  • 482.84 - Legionnaires' disease

Clinical Information

Notes:

  • Legionnaires' Disease: 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.

Terms:

  • Legionella pneumophila Infections

Synonyms

The following clinical terms are approximate synonyms:

  • Healthcare associated Legionnaires' disease
  • Hospital acquired pneumonia
  • Infection by Legionella pneumophilia
  • Legionella infection
  • Legionella pneumonia
  • Pittsburgh pneumonia

Index to Diseases and Injuries

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 the code A48.1 are found in the index:


Information for Patients


Legionnaires' Disease

Also called: Legionellosis

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

  • Are older than 50
  • Smoke
  • Have a chronic 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

  • Legionnaire disease (Medical Encyclopedia)

[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
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.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.