G99: Other disorders of nervous system in diseases classified elsewhere
Codes under G99 (Other disorders of nervous system in diseases classified elsewhere). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| G99.0 | Autonomic neuropathy in diseases classified elsewhere | ✓ |
| G99.0 | Autonomic neuropathy in diseases classified elsewhere | ✓ |
| G99.2 | Myelopathy in diseases classified elsewhere | ✓ |
| G99.2 | Myelopathy in diseases classified elsewhere | ✓ |
| G99.8 | Other specified disorders of nervous system in diseases classified elsewhere | ✓ |
| G99.8 | Other specified disorders of nervous system in diseases classified elsewhere | ✓ |
Frequently asked questions
What is ICD-10-CM code G99?
G99 is an ICD-10-CM category covering Other disorders of nervous system in diseases classified elsewhere. It contains 6 more specific diagnosis codes, 6 of which are billable.
Is G99 a billable code?
No — G99 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example G99.0 — Autonomic neuropathy in diseases classified elsewhere). 6 of the 6 codes under G99 are billable.
What codes fall under G99?
G99 includes G99.0, G99.0, G99.2, G99.2, G99.8, plus 1 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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