G35.31: Secondary progressive multiple sclerosis With mention of acute flare or progression

You have multiple sclerosis.

Multiple sclerosis is often abbreviated to MS. With multiple sclerosis, the brain and spinal cord can become inflamed in different places. The cause of this disorder is not yet known. The brain is made up of several areas. For example, the cerebrum is used to think and plan actions. In the cerebellum, movements are initialized and coordinated. The brain stem is responsible for various unconscious tasks such as breathing. The brain stem passes into the spinal cord. The spinal cord is located in the spinal column. The spinal cord is made up of nerve fibers. The brain uses the nerve fibers to exchange information with the organs, skin and muscles.

Depending on which areas of the brain or spinal cord are damaged, one may have different symptoms. The severity of the symptoms may vary, too. Someone’s vision may be impaired, for example. Or they may perceive certain stimuli, such as touch and heat, less well. They may also feel a tingling or pain. The person may no longer be able to move certain parts of their body properly. There may also be many other symptoms.

The symptoms also depend on the severity of the inflammation. For example, there may be times when the inflammation is less severe. The symptoms may then be fewer or non-existent. There may also be times when the inflammation is more severe. The symptoms may then be more severe.

In the past you have alternated between periods of severe and less severe inflammation of your brain or spinal cord. Now your multiple sclerosis symptoms are slowly getting more severe. The inflammation you have of your brain or spinal cord is currently severe. This is also known as a flare-up. The symptoms can then get more severe.

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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