J05.0: Acute obstructive laryngitis [croup]

Your larynx is inflamed. The airways are constricted as a result.

The larynx can be seen particularly well in men as a bulging area at the front of the neck. This area is also called the Adam’s apple. The larynx is important for breathing and speaking. It consists mainly of cartilage, ligaments, and muscles. The vocal cords are also located in the larynx. The larynx goes down into the windpipe. The inside walls of the larynx and windpipe are made up of mucous membrane.

Due to the inflammation in the larynx, the mucous membrane is swollen. The swelling has constricted your airways. As a result, you may be having breathing difficulties. Due to your constricted airways, you may also have made a whistling noise when breathing.

The vocal cords may also swell up due to the inflammation. As a result, you have a rough or hoarse voice.

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.


Provided by the non-profit organization “Was hab’ ich?” gemeinnützige GmbH on behalf of the Federal Ministry of Health (BMG).