R76.1: Abnormal reaction to tuberculin test

A tuberculosis test on your skin returned an abnormal result.

You had a skin test to show antibodies against tuberculosis bacteria. The immune system protects the body from pathogens and foreign substances. The immune system can also destroy cells in the body that have pathologically changed. Some of the immune system’s antibodies can make pathogens and foreign substances visible to the immune system. Other antibodies attack pathogens or foreign substances directly.

Tuberculosis is also abbreviated to TB. Tuberculosis is caused by certain bacteria. The bacteria are transmitted through coughing and sneezing, for example. The bacteria can remain undetected in the body for a very long time. But they can also cause severe inflammations. The bacteria trigger symptoms when the body’s defense system is weakened. For example, tuberculosis may cause fever, coughing and a feeling of weakness. It is also possible to lose weight and feel very tired.

Your skin test returned an abnormal result. This type of result can mean that there are antibodies against tuberculosis bacteria in the body. However, the test may also not have been conclusive. There are various circumstances that can influence the result of the test. These include vaccinations or medication that suppress the immune system.

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).