Diagnosis Code


Code Information

Diagnosis Code: A48.1

Short Description: Legionnaires' disease

Long Description: Legionnaires' disease

The code A48.1 is VALID for claim submission

Code Classification:

  • Certain infectious and parasitic diseases (A00–B99)
    • Other bacterial diseases (A30-A49)
      • Other bacterial diseases, not elsewhere classified (A48)
        • A48.1 Legionnaires' disease

Code Version: 2022 ICD-10-CM


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

Diagnostic Related Group(s)

The code A48.1 is grouped in the following Diagnostic Related Group(s) (MS-DRG v39.0)
  • Respiratory Infections And Inflammations With Mcc (177)
  • Respiratory Infections And Inflammations With Cc (178)
  • Respiratory Infections And Inflammations Without Cc/mcc (179)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
A48.1 Right Arrow 482.84 Legionnaires' disease

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
A48 Other bacterial diseases, not elsewhere classified
A48.0 Gas gangrene
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

This page was last updated on: 10/1/2023