Excludes1 pair
G31.2 vs G90-
G31.2 and G90 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on G90
dysfunction of the autonomic nervous system due to alcohol (G31.2)
G31.2
Degeneration of nervous system due to alcohol
Billable
- Chapter 6
- Diseases of the nervous system
- Section
- G30-G32
Use when the record says
- Alcoholic cerebellar ataxia
- Alcoholic cerebellar degeneration
- Alcoholic cerebral degeneration
- Alcoholic encephalopathy
- Dysfunction of the autonomic nervous system due to alcohol
Indexed under
- Encephalopathy › alcoholic
- Ataxia, ataxy, ataxic › cerebellar › alcoholic
- Degeneration, degenerative › brain › alcoholic
- Degeneration, degenerative › cerebellar NOS › alcoholic
- Degeneration, degenerative › cortical › alcoholic
G90
Disorders of autonomic nervous system
Not billable
- Chapter 6
- Diseases of the nervous system
- Section
- G89-G99
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027