C90.00: Multiple myeloma Without mention of complete remission

You have a disease of the immune cells. This disease is one of the cancers. This disease is also called multiple myeloma or plasmacytoma.

The tissue in the body is made up of cells. With cancer, the cells multiply uncontrollably, which leads to a malignant neoplasm (abnormal growth of tissue) developing. The cancer cells can destroy the healthy tissue and spread throughout the body.

In your case, a type of immune cell is dividing uncontrollably. These diseased immune cells produce too much of one sort of immune cell, but they do not work. In your case, the diseased immune cells have accumulated in the bone marrow. The blood cells are formed in the bone marrow. If there are a great many diseased immune cells in the bone marrow, then sometimes too few healthy blood cells can be formed.

Not every cancer is the same. There are cancers that develop quickly. You may then quickly feel seriously ill. But there are also cancers that progress slowly. You may then feel generally unwell or weak, or even have no symptoms at all to start with. This disease can damage various organs. The kidneys especially can be damaged by the many immune cells. Often the cancer also damages the cranial bone, the ribs or the bones of the spine.

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).

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Multiple myeloma

Multiple myeloma is a cancer that originates from plasma cells in the bone marrow. With modern therapies, multiple myeloma can usually be effectively treated.