Is G25.5 a billable ICD-10-CM code?

Yes. G25.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does G25.5 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Extrapyramidal and movement disorders (G20-G26).

What cannot be coded together with G25.5?

G25.5 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

G25.5

G25.5 — Other chorea

Billable / specific codeICD-10-CM

G25.5 is a billable, specific ICD-10-CM code for other chorea. 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.

chorea NOS with heart involvement (I02.0)
Huntington's chorea (G10)
rheumatic chorea (I02.-)
Sydenham's chorea (I02.-)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Chorea NOS

Other codes that can never be billed with G25.5

These codes carry an Excludes1 note pointing at G25.5. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G25.5 alone.

R25.1Tremor, unspecified
I02Rheumatic chorea

Risk adjustment

G25.5 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

G25.5 is named in 5 Medicare coverage policies — 5 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A56612Billing and Coding: CT of the Head
A56773Billing and Coding: Neurophysiology Evoked Potentials (NEPs)
A57204Billing and Coding: MRI and CT Scans of the Head and Neck

How G25.5 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 G25.5.

Chorea(chronic) (gravis) (posthemiplegic) (senile) (spasmodic)
Choreoathetosis(paroxysmal)
Hemiballism(us)
Hemichorea
Chorea›progressive
Chorea›Sydenham's›nonrheumatic

Related codes at this level

Codes that share G25. If G25.5 is not quite right, the correct code is usually one of these.

Questions about G25.5

Is G25.5 a billable ICD-10-CM code?: Yes. G25.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does G25.5 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Extrapyramidal and movement disorders (G20-G26).
What cannot be coded together with G25.5?: G25.5 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.