ICD-10-CM · FY 2026 APRIL UPDATE
G31.8
Other specified degenerative diseases of nervous system
Diagnosis reference
Nonbillable categoryThis entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.
Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification
Related entries
Up to 30 descendants in this category
| CODE | DESCRIPTION | TYPE |
|---|---|---|
| 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 |
Use the complete reference
This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.
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