Is G32.81 a billable ICD-10-CM code?

Yes. G32.81 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does G32.81 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Other degenerative diseases of the nervous system (G30-G32).

What cannot be coded together with G32.81?

G32.81 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

G32.81

G32.81 — Cerebellar ataxia in diseases classified elsewhere

Billable / specific codeICD-10-CM

G32.81 is a billable, specific ICD-10-CM code for cerebellar ataxia in diseases classified elsewhere. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

The underlying condition must be sequenced before this code.

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)

Risk adjustment

G32.81 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 182 Spinal Cord Disorders/Injuries0.478 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

G32.81 is named in 12 Medicare coverage policies — 12 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A53057Billing and Coding: Home Health Occupational Therapy
A53064Billing and Coding: Outpatient Occupational Therapy
A53065Billing and Coding: Outpatient Physical Therapy
A54969Billing and Coding: Nerve Conduction Studies and Electromyography

How G32.81 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G32.81.

Ataxia, ataxy, ataxic›cerebellar›in›specified disease NEC

Related codes at this level

Codes that share G32.8. If G32.81 is not quite right, the correct code is usually one of these.

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

Questions about G32.81

Is G32.81 a billable ICD-10-CM code?: Yes. G32.81 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does G32.81 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Other degenerative diseases of the nervous system (G30-G32).
What cannot be coded together with G32.81?: G32.81 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.