G32.81

Cerebellar ataxia in diseases classified elsewhere

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 11 never code together

G32.8code

Excludes1

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

G32.81code

Excludes1

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

G00-G99chapter

Excludes2

certain conditions originating in the perinatal period (P04-P96)P04-P96
certain infectious and parasitic diseases (A00-B99)A00-B99
complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
neoplasms (C00-D49)C00-D49
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 9

G32.81code

Code first

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

G32.8code

Code first

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

Index entries leading here 1

Ataxia, ataxy, ataxic R27.0
- cerebellar (hereditary) G11.9
  - in
    - specified disease NEC G32.81

Alongside this code 1 same parent — G32.8

G32.89 Oth degeneratv disord of nervous sys in dis classd elswhr

Medications 2

3 Cerebellar Diseases drugs 2 Cerebellar Ataxia drugs

MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

CMS22HCC72 CMS28HCC182 ESRD21HCC72 ESRD24HCC72

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable: yes
Code set: FY2026
Parent: G32.8
Block: G30-G32
Siblings: 1

Present FY2024–FY2027.