I01.9: Acute rheumatic heart disease, unspecified

Your immune system is attacking your body after an illness involving certain bacteria. Your heart has become inflamed as a result.

You have become infected some time ago with certain bacteria. You had a sore throat or tonsillitis caused by bacteria. Your immune system fought the bacteria using certain antibodies. However, these antibodies can also attack the body’s tissue.

Your heart has become inflamed as a result of this condition. The heart pumps blood through the body. In the process, the blood flows through blood vessels. The blood supplies all areas of the body with oxygen and nutrients.

When a cardiac muscle is inflamed, the heart may, for example, have an irregular beat or it may no longer pump enough blood through the body. This may result in missed heartbeats, chest pain, or shortness of breath.

Also common is a high temperature, joint pain, and feeling generally ill.

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).