A48.1: Pneumonic Legionnaires disease

You have been infected by Legionnaires’ disease (legionellosis).

Legionella are bacteria. They can occur in soil and water. You can become infected by breathing in the bacteria along with water droplets. Unclean water droplets like these can be breathed in while showering, for example. The unclean water droplets may also get into ambient air via a defective air-conditioning system. Temperatures below 20 degrees and above 60 degrees kill off the bacteria.

Legionnaires’ disease can cause headaches and pain in the limbs. The legionella have also inflamed your lungs. The lungs are on the left and right side of the ribcage. They are also connected to the nose and mouth via the bronchial tubes and windpipe (trachea). Pneumonia can cause various symptoms. These include shortness of breath, coughing and a high temperature.

Additional indicator

On medical documents, the ICD code is often appended by letters that indicate the diagnostic certainty or the affected side of the body.

  • G: Confirmed diagnosis
  • V: Tentative diagnosis
  • Z: Condition after
  • A: Excluded diagnosis
  • L: Left
  • R: Right
  • B: Both sides

Further information


This information is not intended for self-diagnosis and does not replace professional medical advice from a doctor. If you find an ICD code on a personal medical document, please also note the additional indicator used for diagnostic confidence.
Your doctor will assist you with any health-related questions and explain the ICD diagnosis code to you in a direct consultation if necessary.


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