2022 ICD-10-CM Diagnosis Code A48.1

Legionnaires' disease

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • A48.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2022 edition of ICD-10-CM A48.1 became effective on October 1, 2021.
  • 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
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to A48.1:
  • A00-B99
    2022 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
  • A48
    ICD-10-CM Diagnosis Code A48

    Other bacterial diseases, not elsewhere classified

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Type 1 Excludes
    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 v39.0):
  • 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-CM

Code 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
Code annotations containing back-references to A48.1:
  • Type 1 Excludes: J15
    ICD-10-CM Diagnosis Code J15

    Bacterial pneumonia, not elsewhere classified

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Code First
    Code Also
    • associated abscess, if applicable (J85.1)
    Includes
    • bronchopneumonia due to bacteria other than S. pneumoniae and H. influenzae
    Type 1 Excludes
    • chlamydial pneumonia (J16.0)
    • congenital pneumonia (P23.-)
    • Legionnaires' disease (A48.1)
    • spirochetal pneumonia (A69.8)

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

ICD-10-CM Codes Adjacent To A48.1
A43.8 Other forms of nocardiosis
A43.9 Nocardiosis, unspecified
A44 Bartonellosis
A44.0 Systemic bartonellosis
A44.1 Cutaneous and mucocutaneous bartonellosis
A44.8 Other forms of bartonellosis
A44.9 Bartonellosis, unspecified
A46 Erysipelas
A48 Other bacterial diseases, not elsewhere classified
A48.0 Gas gangrene
A48.1 Legionnaires' disease
A48.2 Nonpneumonic Legionnaires' disease [Pontiac fever]
A48.3 Toxic shock syndrome
A48.4 Brazilian purpuric fever
A48.5 Other specified botulism
A48.51 Infant botulism
A48.52 Wound botulism
A48.8 Other specified bacterial diseases
A49 Bacterial infection of unspecified site
A49.0 Staphylococcal infection, unspecified site
A49.01 Methicillin susceptible Staphylococcus aureus infection, unspecified site

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.