Other degenerative diseases of the nervous system
27 codes in this section
About Section G30-G32
Section G30-G32 (G30-G32) covers other degenerative diseases of the nervous system. It sits within the Diseases of the nervous system chapter (G00-G99). This section contains 27 ICD-10-CM codes, 21 billable diagnoses you can submit on a claim, and 6 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in G30-G32
Grouped by 3-character root code. Click any code for full detail.
| G30.0 | Alzheimer's disease with early onset | Billable |
| G30.1 | Alzheimer's disease with late onset | Billable |
| G30.8 | Other Alzheimer's disease | Billable |
| G30.9 | Alzheimer's disease, unspecified | Billable |
| G31.0 | Frontotemporal dementia | Header |
| G31.01 | Pick's disease | Billable |
| G31.09 | Other frontotemporal neurocognitive disorder | Billable |
| G31.1 | Senile degeneration of brain, not elsewhere classified | Billable |
| G31.2 | Degeneration of nervous system due to alcohol | Billable |
| G31.8 | Other specified degenerative diseases of nervous system | Header |
| G31.80 | Leukodystrophy, unspecified | Billable |
| G31.81 | Alpers disease | Billable |
| G31.82 | Leigh's disease | Billable |
| G31.83 | Neurocognitive disorder with Lewy bodies | Billable |
| G31.84 | Mild cognitive impairment of uncertain or unknown etiology | Billable |
| G31.85 | Corticobasal degeneration | Billable |
| G31.86 | Alexander disease | Billable |
| G31.87 | Primary progressive apraxia of speech | Billable |
| G31.89 | Other specified degenerative diseases of nervous system | Billable |
| G31.9 | Degenerative disease of nervous system, unspecified | Billable |
| G32.0 | Subacute combined degeneration of spinal cord in diseases classified elsewhere | Billable |
| G32.8 | Other specified degenerative disorders of nervous system in diseases classified elsewhere | Header |
| G32.81 | Cerebellar ataxia in diseases classified elsewhere | Billable |
| G32.89 | Other specified degenerative disorders of nervous system in diseases classified elsewhere | Billable |
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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