R77.9: Abnormality of plasma protein, unspecified

The amount of certain proteins in your blood has changed.

There are different types of proteins in the blood with different tasks. The proteins help with blood clotting or fighting off pathogens, for example. Changes in the level of proteins in the blood can have a number of causes. This depends on exactly what type is affected. Most proteins are produced in the liver. If there are not enough proteins in the blood, this can be an indication of liver disease.

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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