A31.9: Mycobacterial infection, unspecified

You have an inflammation caused by mycobacteria.

Mycobacteria are a particular type of bacteria. The bacteria trigger symptoms when the body’s defense system is weakened. The symptoms depend on which organ is affected. The bacteria are resistant to many drugs. The bacteria are difficult to treat. Treatment is therefore over a long period for the most part.

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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