K12.1: Other forms of stomatitis

Your oral mucous membrane is inflamed.

There are many causes of an inflamed oral mucous membrane. For example, these include pathogens, a weakened immune system or ill-fitting dentures.

An inflamed oral mucous membrane is typically red, swollen and painful. Sour or spicy foods can make the symptoms worse. An inflamed oral mucous membrane may bleed or cause bad breath.

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).