G31: Other degenerative diseases of nervous system, not elsewhere classified
G31.0: Circumscribed brain atrophy
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.
Various disorders can cause one’s brain, or certain parts of one’s brain, to get smaller. The brain may also no longer be able to work properly in these areas. Depending on which areas of the brain are affected, one may have a range of symptoms. For example, one’s thinking and behavior may change. You may also have trouble speaking. One may no longer be able to remember the right word for something, for example. It is also possible to have other symptoms.
Patient Disclaimer
The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.