G99
Non-billableOther disorders of nervous system in diseases classified elsewhere
G99 is the ICD-10-CM code for Other disorders of nervous system in diseases classified elsewhere. It is a non-billable category code — use a more specific child code such as G99.0 for billing.
- Status
- Header (non-billable)
- Chapter
- G00-G99
- Subcodes
- 3
- Edition
- FY2026
G00-G99 Diseases of the nervous system
What this means — in plain language
MedlinePlus · NIHThe brain, spinal cord, and nerves make up the nervous system. Together they control all the workings of the body. When something goes wrong with a part of your nervous system, you can have trouble moving, speaking, swallowing, breathing, or learning. You can also have problems with your memory, senses, or mood. There are more than 600 neurologic diseases. Major types include: Diseases caused by faulty genes, such…
Read more about Neurologic Diseases at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition