G32.81 – Cerebellar ataxia in diseases classified elsewhere

ICD-10-CM 2027 diagnosis code · Other degenerative diseases of the nervous system

Billable code

ICD-10-CM code G32.81

Code: G32.81 (claims format: G3281)
Description: Cerebellar ataxia in diseases classified elsewhere
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 6. Diseases of the nervous system (G00-G99)
Block: G30-G32 Other degenerative diseases of the nervous system
Parent codes: G32 › G32.8

Notes for G32.81

Excludes1 (not coded here):

systemic atrophy primarily affecting the central nervous system in alcoholic cerebellar ataxia (G31.2)
systemic atrophy primarily affecting the central nervous system in myxedema (G13.2)

Code first:

underlying disease, such as:
celiac disease (with gluten ataxia) (K90.0)
cerebellar ataxia (in) neoplastic disease (paraneoplastic cerebellar degeneration) (C00-D49)
non-celiac gluten ataxia (M35.9)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

G32.8 – Other specified degenerative disorders of nervous system in diseases classified elsewhere

Excludes1 (not coded here):

superior hemorrhagic polioencephalitis [Wernicke's encephalopathy] (E51.2)

Code first:

underlying disease, such as:
amyloidosis cerebral degeneration (E85.-)
cerebral degeneration (due to) hypothyroidism (E00.0-E03.9)
cerebral degeneration (due to) neoplasm (C00-D49)
cerebral degeneration (due to) vitamin B deficiency, except thiamine (E52-E53.-)

Index terms for G32.81

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in G32.8

G32.89 – Other specified degenerative disorders of nervous system in diseases classified elsewhereBillable

Frequently asked questions

What is ICD-10 code G32.81?

G32.81 is the ICD-10-CM code for cerebellar ataxia in diseases classified elsewhere, in the block G30-G32 (Other degenerative diseases of the nervous system).

Is G32.81 a billable code?

Yes. G32.81 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does G32.81 belong to?

It belongs to category G32 – Other degenerative disorders of nervous system in diseases classified elsewhere.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.