G31.8
G31.8: Other specified degenerative diseases of nervous system
Non-billable headerICD-10-CM
G31.8 is a non-billable header ICD-10-CM code for other specified degenerative diseases of nervous system. It cannot be billed on its own: choose one of the more specific child codes below.
Other codes that can never be billed with G31.8
Their own Excludes1 notes name this code, so the conflict is not listed above.
- E74.4Disorders of pyruvate metabolism and gluconeogenesis
- E88.4Mitochondrial metabolism disorders
- F06.7Mild neurocognitive disorder due to known physiological condition
- F07.0Personality change due to known physiological condition
- G21Secondary parkinsonism
- G71.3Mitochondrial myopathy, not elsewhere classified
- R41Other symptoms and signs involving cognitive functions and awareness
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead G31.8
9 child codes. Green means billable.
- G31.80Leukodystrophy, unspecified
- G31.81Alpers disease
- G31.82Leigh's disease
- G31.83Neurocognitive disorder with Lewy bodies
- G31.84Mild cognitive impairment of uncertain or unknown etiology
- G31.85Corticobasal degeneration
- G31.86Alexander disease
- G31.87Primary progressive apraxia of speech
- G31.89Other specified degenerative diseases of nervous system