I67.5: Moyamoya disease

You have a congenital disorder, which means you were born with it. With this, over a long period of time, the blood vessels in your brain get narrower or get blocked. As a result, the brain no longer receives enough blood and it gets damaged. Collateral circulation may also occur to bypass the bottlenecks. Collateral circulation involves new connections between blood vessels. Bleeds occur more easily from such a collateral circulation.

Various symptoms can appear over a period of time. For example, one’s memory may get worse or one might get confused more often. One sometimes has problems with moving, or in carrying out certain activities.

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.