A48.1
BillableLegionnaires' disease
Legionnaires' disease
Coding Notes
Includes
Conditions included under this code
- diseases generally recognized as communicable or transmissible
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- certain localized infections - see body system-related chapters
- •actinomycetomaB47.1
Excludes 2
Conditions not included here, but the patient may have both
Use Additional Code
Additional codes that should follow this code
Related Codes(6)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(86)
SNOMED CT
- Legionella infection26726000
- Legionellosis26726000
- Interstitial pneumonia64667001
- Legionella micdadei76090006
- Legionella pittsburghensis76090006
- Pittsburgh pneumonia76090006
- Tatlockia micdadei76090006
- Legionella pneumonia195889001
- Legionnaire's disease195889001
- Legionnaires disease195889001
- Legionnaires' disease195889001
- Infection by Legionella pneumophilia269574000
- Infection caused by Legionella pneumophilia269574000
- Healthcare associated Legionnaires' disease408681003
- Healthcare associated legionnaire disease408681003
- Healthcare associated legionnaire's disease408681003
UMLS
- Disease, LegionnaireC0023241
- Disease, Legionnaires'C0023241
- INFECT LEGIONELLA PNEUMOPHILAC0023241
- Infection by Legionella pneumophiliaC0023241
- Infection caused by Legionella pneumophiliaC0023241
- Infection caused by Legionella pneumophilia (disorder)C0023241
- Infection, Legionella pneumophilaC0023241
- Infections, Legionella pneumophilaC0023241
- LEGIONELLA PNEUMOPHILA INFECTC0023241
- LEGIONNAIRE DISC0023241
- LEGIONNAIRES DISC0023241
- Legionella PneumoniaC0023241
- Legionella pneumoniaC0023241
- Legionella pneumonia (disorder)C0023241
- Legionella pneumophila InfectionC0023241
- Legionella pneumophila InfectionsC0023241
- Legionella pneumophila infectionC0023241
- Legionellal pneumoniaC0023241
- Legionnaire DiseaseC0023241
- Legionnaire's DiseaseC0023241
- Legionnaire's diseaseC0023241
- Legionnaires DiseaseC0023241
- Legionnaires diseaseC0023241
- Legionnaires' DiseaseC0023241
- Legionnaires' diseaseC0023241
- Pneumonia legionellaC0023241
- disease legionnaire'sC0023241
- disease legionnaires'sC0023241
- diseases legionnaire'sC0023241
- diseases legionnairesC0023241
- legionella pneumoniaC0023241
- legionnaire diseaseC0023241
- legionnaire's diseaseC0023241
- legionnaires diseaseC0023241
- legionnaires' diseaseC0023241
- pneumonia legionellaC0023241
Clinical Terms
- Legionella micdadei
- disease legionnaire's
- Infections, Legionella pneumophila
- Healthcare associated legionnaire disease
- Legionella pneumophila Infections
- Infection by Legionella pneumophilia
- diseases legionnaires
- Tatlockia micdadei
- LEGIONNAIRES DIS
- legionella pneumonia
- Disease, Legionnaires'
- Infection caused by Legionella pneumophilia
- Legionnaires disease
- Legionnaire's Disease
- pneumonia legionella
- legionnaire disease
- Legionella pneumophila Infection
- Interstitial pneumonia
- Legionella infection
- Disease, Legionnaire
- Legionellal pneumonia
- LEGIONELLA PNEUMOPHILA INFECT
- Legionella pittsburghensis
- Legionella pneumonia (disorder)
- Healthcare associated legionnaire's disease
- INFECT LEGIONELLA PNEUMOPHILA
- disease legionnaires's
- Pittsburgh pneumonia
- LEGIONNAIRE DIS
- Infection, Legionella pneumophila
- Healthcare associated Legionnaires' disease
- Infection caused by Legionella pneumophilia (disorder)
- Legionellosis
- diseases legionnaire's
Frequently Asked Questions
What is the ICD-10 code for legionnaires' disease?
The ICD-10-CM code for legionnaires' disease is A48.1. The full clinical description is "Legionnaires' disease". A48.1 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code A48.1 mean?
ICD-10-CM code A48.1 represents “Legionnaires' disease”. It is classified under Chapter 1: Certain Infectious and Parasitic Diseases and is a billable/specific code that can be used on a claim.
Is A48.1 a billable code?
Yes, A48.1 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is A48.1 in?
A48.1 is in Chapter 1: Certain Infectious and Parasitic Diseases (codes A00-B99).
What codes cannot be used with A48.1?
A48.1 has Excludes1 notes indicating codes that cannot be used together with it, including: certain localized infections - see body system-related chapters; actinomycetoma (B47.1).
Are additional codes required with A48.1?
Yes, when using A48.1, also report: resistance to antimicrobial drugs (Z16.-).
What SNOMED CT codes does A48.1 map to?
A48.1 maps to 6 SNOMED CT concepts: 408681003, 269574000, 64667001, 26726000, 76090006, and 1 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for A48.1?
A48.1 is linked to 1 UMLS Concept Unique Identifier: C0023241. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does A48.1 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like legionnaires' disease affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of A48.1?
A48.1 maps to the ICD-11 code: 1C19.Z (Legionellosis, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.