G32.81

Billable code

Cerebellar ataxia in diseases classified elsewhere

The ICD-10 code for cerebellar ataxia in diseases classified elsewhere is G32.81.

Clinical notes

Code first

This code represents a manifestation of an underlying disease. Coding convention requires the underlying (etiology) code to be sequenced first, with this code listed second.

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)

Excludes1 (not coded here)

An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).

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)

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
•This code represents a manifestation. Documentation should identify the underlying condition, which must be coded first.
•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

Related codes in this category

G32.89Other specified degenerative disorders of nervous system in diseases classified elsewhere
G32.81Cerebellar ataxia in diseases classified elsewhere

ICD-9-CM equivalent

Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.

3344

View full ICD-10 → ICD-9 crosswalk →

Associated MS-DRGs

G32.81 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.

Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.